JPS5997749A - Casting method of die casting product - Google Patents
Casting method of die casting productInfo
- Publication number
- JPS5997749A JPS5997749A JP20667882A JP20667882A JPS5997749A JP S5997749 A JPS5997749 A JP S5997749A JP 20667882 A JP20667882 A JP 20667882A JP 20667882 A JP20667882 A JP 20667882A JP S5997749 A JPS5997749 A JP S5997749A
- Authority
- JP
- Japan
- Prior art keywords
- casting
- molten metal
- cavity
- die
- biscuit
- 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
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
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、ダイカスト法による鋳物の鋳造方法１こ関す
る。特に、いわゆる身食い欠陥が少なく。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for casting a casting by a die casting method. In particular, there are fewer so-called flesh-eating defects.
そのため溶湯歩留まりが良いダイカス［ｆｓ物の鋳造方
法に関する。Therefore, the present invention relates to a method for casting die castings [fs] with a high yield of molten metal.
ダイカスト法は、精密な金型に溶湯金属を高温で圧入し
て鋳造を行う方法で、鋳肌のすぐれた鋳物を短時間に大
量に生産することができる。そこで、アルミニウム合金
の鋳造を中心に１種々の量産品の鋳造にすでに使用され
ており、又、新たな鋳造品への適用も試みられている。The die casting method is a casting method in which molten metal is press-fitted into a precision mold at high temperature, and it is possible to produce large quantities of castings with excellent casting surfaces in a short period of time. Therefore, it has already been used to cast various mass-produced products, mainly aluminum alloy casting, and attempts are being made to apply it to new cast products.
°ここで、ダイカスト法による一般的な鋳造方法を、第
１図を基し
に説明する。固定金型為および可動金型１よりなる分割
鋳型により形成されるキャビティＣの下方に、′溶湯の
通過する開口面積の最も少ないゲート部ｄと、″ｙンナ
部ｅおよび、ビスケット部ｆがあ□る。そして、ビスケ
ット部ｆに連通して、横向きに射出スリーブ部ｇが配設
され、さらに射出スリ一部の羨位には、プランジャｈが
前後方向に摺動可能に嵌装さねている。キャビティへの
溶湯の供給は：１次の工程により行われる。すなわち、
溶湯を射出スリーブ部ｇ′の一部にある溶湯注入口ｉか
ら、射出スリーブ部ｇに注入する。溶湯が射出スリーブ
部ｇに充填された後に、プランジャｈを前進させて溶湯
を加圧し、溶湯を射出スリーブ部ｇからビスケット部ｆ
に向けて射出する。溶湯は。Here, a general die casting method will be explained with reference to FIG. 1. Below the cavity C formed by the split mold consisting of the fixed mold and the movable mold 1, there are a gate part d with the smallest opening area through which the molten metal passes, an inner part e, and a biscuit part f. □.An injection sleeve part g is disposed laterally in communication with the biscuit part f, and a plunger h is slidably fitted in the front-rear direction in a part of the injection sleeve. The supply of molten metal to the cavity is carried out by the following steps:
Molten metal is injected into the injection sleeve g from a molten metal inlet i located in a part of the injection sleeve g'. After the injection sleeve part g is filled with molten metal, the plunger h is advanced to pressurize the molten metal, and the molten metal is transferred from the injection sleeve part g to the biscuit part f.
Fire towards. The molten metal.
ビスケット部ｒ、ランナ部０を経て、ゲート部ｄよりキ
ャビティＣ内に霧状に噴出し９次第にキャビディ０を満
たしてゆく。このような工程を経て。After passing through the biscuit part r and the runner part 0, it is sprayed in the form of a mist into the cavity C from the gate part d, gradually filling the cavity 0. After going through this process.
キャビティＣに溶湯は充填される。この結果、溶湯がキ
ャビティＣ内に高速で射出され、その後急速に凝固する
ので、一般にダイカスト鋳物は良好な微細な鋳造組織に
有することになるといわれている。Cavity C is filled with molten metal. As a result, the molten metal is injected into the cavity C at high speed and solidified rapidly thereafter, so that the die casting is generally said to have a fine casting structure.
ところが、このようなダイカスト鋳物の表面組織を顕微
鏡で観察すると、一端が偏平な母材と異なる組織（以下
、異常層という）が島状に多く存在し、全体として不均
一な組織となっている場合が少なくない。このような異
常層はゲート部の前後に多く、さらにランチ部、および
、キャビティ部の製品表面に存在することも少なくない
。この異常層の存在する組織は、その境界部にクラック
が発生しやすく、また伝播しやすいので、異常層化じや
すい。又、ゲート部を切断して鋳物の製品部分を分離す
る際に、ゲート部の割れが製品部分の異常層に伝播し、
製品部分まで剥離や割れが及んでしまう。これが、いわ
ゆる身食い欠陥という鋳造欠陥の発生である。However, when the surface structure of such a die-cast casting is observed under a microscope, it is found that there are many island-like structures (hereinafter referred to as abnormal layers) that differ from the base material, which has a flat end, resulting in an overall non-uniform structure. There are many cases. Such abnormal layers are often present before and after the gate portion, and are also often present on the product surface in the launch portion and cavity portion. In a structure in which this abnormal layer exists, cracks are likely to occur and propagate at the boundaries thereof, so that cracks are likely to form into abnormal layers. In addition, when cutting the gate part to separate the product parts of the casting, cracks in the gate part propagate to the abnormal layer of the product part.
Peeling and cracking may extend to the product part. This is the occurrence of a casting defect called a so-called carnivorous defect.
以上の鋳造不良の解消を目積して研究を進めた結果１発
明者らは、以下のような異常層生成のメカニズムを全く
新らし夫、明らかにすることができた。すなわち、射出
スリーブ部内に注入された溶湯が、主として射出スリー
ブ部上の接触面で一部凝固し、外殻凝固層を形成する。As a result of conducting research with the aim of eliminating the above-mentioned casting defects, the inventors were able to completely new and clarify the following abnormal layer generation mechanism. That is, the molten metal injected into the injection sleeve partially solidifies mainly at the contact surface on the injection sleeve to form a solidified outer shell layer.
その外殻凝固層がプランジャの作−こより破壊さｊ、凝
固層の破片が溶湯に混入し、溶湯の移動とともにランチ
部やキャビディ内に注入され、最終的に鋳物内に残り、
異常層となったものである。The outer solidified layer is destroyed by the action of the plunger, and fragments of the solidified layer mix into the molten metal, are injected into the launch part and cavity as the molten metal moves, and finally remain in the casting.
This is an abnormal layer.
本発明は、上記の異常層生成のメカニズムに関する新知
見を基にし、異常層の生成を防止できるダイカスト鋳物
の鋳造方法の提供を目的とするものである。The present invention is based on new knowledge regarding the mechanism of abnormal layer formation described above, and aims to provide a method for casting a die-casting product that can prevent the formation of an abnormal layer.
そして９本発明は、射出スリーブ部内にある金属溶湯を
加圧し、ビスケット部、ランチ部、およびゲート部を経
てキャビディ内に高速で射出して徴とするダイカスト鋳
物の鋳造方法、である。The present invention is a method for casting a die casting by pressurizing the molten metal in the injection sleeve and injecting it at high speed into the cavity through the biscuit part, the launch part, and the gate part.
き込まれた外殻凝固層の破片のキャビディ内への流入を
阻止できる。その結果、キャビティ内の製品鋳物中での
異常層の生成を防止することができる。そして、異常層
の存在ｔこより生じた欠陥、すなわち、＋＋ｎｔ圧性を
阻害する加工時の割れ発生、身食い欠陥等の発生のない
鋳物を得ることができる。It is possible to prevent the pieces of the solidified outer shell layer from flowing into the cavity. As a result, it is possible to prevent the formation of an abnormal layer in the product casting inside the cavity. Further, it is possible to obtain a casting without defects caused by the presence of the abnormal layer, that is, without occurrence of cracks during processing that impede pressure properties, eating defects, etc.
また、均一な組織を得ることができるので、鋳物の実体
強度も著しく増加する。なお、従来、外殻凝固層の破片
が主としてゲート部の前後に堆積し。Furthermore, since a uniform structure can be obtained, the actual strength of the casting is significantly increased. In addition, conventionally, fragments of the outer shell solidified layer were deposited mainly before and after the gate part.
そのためゲート部の溶湯通過面積を狭めて溶湯のキャビ
ディ内への良好な湯回りを阻害する弊害もあったが９本
方法によりスムースな湯回りを確保することもできる。This had the disadvantage of narrowing the molten metal passage area of the gate portion and impeding the good flow of the molten metal into the cavity, but the nine methods can also ensure smooth flow of the molten metal.
本発明において、＝ｐンナ部に設ける絞り部の数は、１
個又は必要に応じて複数個である。１個でも、溶湯中の
外殻凝固層の破片のキャビティ内への流入を相当程度阻
止できる。そして、一般的に絞り部が多くなればなる程
、破片の流入阻止の効果は大きくなる。したがって、溶
湯の種類、溶湯数個の絞りを設ける必要がある場合もあ
る。他方。In the present invention, the number of constricted portions provided in the =pner portion is 1.
or more as necessary. Even one piece can significantly prevent fragments of the outer solidified layer in the molten metal from flowing into the cavity. In general, the more constricted parts there are, the greater the effect of preventing the inflow of debris. Therefore, depending on the type of molten metal, it may be necessary to provide a restriction for several molten metals. On the other hand.
が長くなる。その結果、キャビティ内への溶湯の充填が
完了する前に凝固が進んで、湯回り不良の原因になるの
で好ましくない。becomes longer. As a result, the solidification of the molten metal progresses before the filling of the molten metal into the cavity is completed, which is undesirable because it causes poor running of the molten metal.
絞り部を設ける位置は、ランチ部の特定箇所１こ限定さ
れるものではない。複数個設ける場合は。The position where the constriction part is provided is not limited to one specific location of the launch part. When setting up multiple units.
ランナ部の軸方向の直線上に一定間隔をおいて絞りを設
けてもよく、又ランチ部の内周方向Ｆこ対向して設けて
もよい。The throttles may be provided at regular intervals on a straight line in the axial direction of the runner portion, or may be provided facing each other in the inner circumferential direction F of the launch portion.
絞り部の形状も、特に限定されない。ただ、外殻凝固層
の破片がキャビティ内に流入することを阻止できる形状
であればよい。The shape of the constricted portion is also not particularly limited. However, any shape is sufficient as long as it can prevent fragments of the outer shell solidified layer from flowing into the cavity.
絞り部の溶湯通路の断面積は、ゲート部の溶湯通路の断
面積以上であることが必要である。絞り部の溶湯通路が
ゲート部の溶湯通路の断面積より大きいと、溶湯の供給
がゲート部で大きく制約され、その結果キャビティ内へ
の溶湯の湯回り不良となり好ましくない。又、同様の理
由から、複数のゲート部がある場合ｔこは、ゲート部の
溶湯通路の断面積の合計が、絞り部の溶湯通路の断面積
以上であることが必要である。なお、複数の絞り部の断
面積は、同一でも各々異ってもよい。The cross-sectional area of the molten metal passage in the throttle part needs to be greater than or equal to the cross-sectional area of the molten metal passage in the gate part. If the cross-sectional area of the molten metal passage in the throttle part is larger than the cross-sectional area of the molten metal passage in the gate part, the supply of molten metal will be greatly restricted at the gate part, resulting in poor flow of the molten metal into the cavity, which is undesirable. For the same reason, when there are multiple gate sections, the total cross-sectional area of the molten metal passages in the gate sections must be greater than or equal to the cross-sectional area of the molten metal passages in the throttle section. Note that the cross-sectional areas of the plurality of narrowed portions may be the same or different.
本発明での、その他のキャビディ部、ゲート部。Other cavity parts and gate parts in the present invention.
ランナ部、ビスケット部および射出スリーブ部ノ構造、
材質等は９通常のダイカスト法に使用する場合と異なる
ことはない。Structure of runner part, biscuit part and injection sleeve part,
The materials etc. are the same as those used in the normal die casting method.
以下９本発明の詳細な説明する。Hereinafter, nine aspects of the present invention will be described in detail.
実施例
本発明を実施して、自動車部品のケースカバーをＨａし
た。使用した１５００）ン横型ダイカスト鋳物機につい
て、第２図に、溶湯の通過経路を中心にした縦断面図を
示す。固定金型ｌと可動金型２より形成されるキャビテ
ィ３の下部に、キャビティ８に連通して、ゲート部４．
ランナ部５およびビスケット部６がある。ビスケット部
６の下部横には、射出スリーブ部７が連通して設けられ
ており、さらに射出スリーブ部７内には、プランジャ８
が前後方向に摺動可能に設けられている。Example The present invention was carried out to make a case cover for an automobile part. FIG. 2 shows a vertical cross-sectional view of the 1500 mm horizontal die-casting machine used, centering on the path through which the molten metal passes. At the bottom of the cavity 3 formed by the fixed mold l and the movable mold 2, a gate part 4 is connected to the cavity 8.
There is a runner section 5 and a biscuit section 6. An injection sleeve section 7 is provided in communication with the lower side of the biscuit section 6, and a plunger 8 is disposed within the injection sleeve section 7.
is provided so as to be slidable in the front-back direction.
ランチ部５の内面に１個の絞り部９を設けた。絞り部の
溶湯通路の断面積は厚さ９．５ ｆｉ Ｘ幅８０ｆｆ。One constriction part 9 is provided on the inner surface of the launch part 5. The cross-sectional area of the molten metal passage in the throttle part is 9.5 fi thick x 80 ff wide.
ゲート部の溶湯通路の断面積は厚さｇ、 ｏ ｇｔ ｘ
幅８０ｎである。Ｈａは、６８５℃のアルミニウム溶湯
（Ｊ Ｉ ５ＡＤＣ１２）を使用し、注湯口１０より２
秒の間をおいて、プランジャー８により溶湯を低速射出
プランジャ速度０．２ ｍ ／ ｓｅｅ 、高速射出プ
ランジャ速度２．０ ｍ ／ ｓｅｅで射出した。鋳込
み完了後、プランジャを後退させ、さらｔこ鋳物の冷却
を待って、鋳型をばらして、ケースカバーを取り出した
。The cross-sectional area of the molten metal passage in the gate part is the thickness g, o gt x
The width is 80n. For Ha, 685°C molten aluminum (J I 5ADC12) was used, and 2
After an interval of seconds, the molten metal was injected by the plunger 8 at a low injection plunger speed of 0.2 m/see and a high injection plunger speed of 2.0 m/see. After the casting was completed, the plunger was moved back, the casting was allowed to cool down, the mold was taken apart, and the case cover was taken out.
ｖｙ物の製品ｍ分を分離するため、ゲート部４をプレス
切断した。その結果割れや剥離か鋳物製品に牛する身食
い欠陥の発生は見られなかった。The gate portion 4 was cut by press in order to separate m portions of vy products. As a result, no cracking, peeling, or other defects in the cast products were observed.
体として均質な組織が形成されていた。そして。A homogeneous body tissue was formed. and.
この鋳物か響平板引張試験片を採取し、引張り試験を行
−た。その結果をＩｒ８図中の白抜きの丸印で示した。A sound plate tensile test piece was taken from this casting and subjected to a tensile test. The results are shown as open circles in the Ir8 diagram.
なお９本発明の効果を比較するため、ラン：す部５に絞
り部９を設けることなく、シかも、聾は同一−ｆ＝件、
すなわち、上記と同一溶湯、同一鋳造条件で、ケースカ
バーをダイカスト鋳造した。9. In order to compare the effects of the present invention, it is possible to compare the effect of the present invention without providing the aperture part 9 in the run part 5, and for the deafness to be the same - f = case,
That is, the case cover was die-cast using the same molten metal and the same casting conditions as above.
鋳物の表面を観察したところ：ゲート部４の前後を中心
とし、さらに、その前のランナ部、およびその後の製品
鋳物の組織中に異常層が散在してし・た。異常層を含む
鋳物の引張り試験結果を、第８図中の黒の丸印で示した
。同図から明らカミなよりに１本願発明により得られる
異常層を含まなし・鋳物の実体強度は、異常層を含む鋳
物の２倍以上［こ達することがわかる。When the surface of the casting was observed, abnormal layers were found scattered around the front and rear of the gate part 4, in the runner part in front of it, and in the structure of the product casting after that. The tensile test results of the casting containing the abnormal layer are shown by black circles in FIG. It is clear from the figure that the actual strength of the casting without the abnormal layer obtained by the present invention is more than twice that of the casting containing the abnormal layer.
実施例２
局面ｔこ対向、して設けらｒてし・る。そグ）紋り部９
８の溶湯通路の断面積は厚さ２５ｆｆ×幅８０酊、絞×
幅８０朋である。他のダイ力
例１と全く同一でケースカバー
得られたケースカバ（鋳物の表ｉｔｔこ１ま、全く異常
層の存在はみとめら１な７！Ｊ−った。Example 2 Two surfaces are placed opposite each other. Sogu) Crest part 9
The cross-sectional area of the molten metal passage in No. 8 is 25 ff thick x 80 ff x width.
It is 80mm wide. A case cover was obtained using the same method as in Example 1 of another die force.
第１図は、従来のダイカスト鋳造方法１こイ吏ＪＯのダ
イカスト鋳造機の〒部概略ＩＱ−２図、および第４図は
９本発明の実施例に使用のダイカス？Ｍ造機の一部概略
図、および第３図は、従来方法と本願発明方法によりそ
れぞれ得られた鋳物の比重と引張り強さの関係を示す図
。
ｌ二固定金型、２：可動金型、８：キャビティ。
４：ゲート部、５：ランナ部、６：ビスケツト部、７：
射出スリーブ部、８ニブランジヤ。
９：絞り部、１０：注湯口
（外２名）
第３回
Ｊ：ｌ：、 艶Fig. 1 shows a conventional die casting method 1. A schematic IQ-2 diagram of the die casting machine of JO, and Fig. 4 shows a die cast used in an embodiment of the present invention. A partial schematic diagram of the M-making machine and FIG. 3 are diagrams showing the relationship between specific gravity and tensile strength of castings obtained by the conventional method and the method of the present invention, respectively. l Two fixed molds, 2: movable mold, 8: cavity. 4: Gate part, 5: Runner part, 6: Biscuit part, 7:
Injection sleeve part, 8 nib lunge. 9: Squeezing part, 10: Pouring port (2 people outside) 3rd J: l:, Gloss
Claims (2)
ャビティ内に高速で射出してダイカスト鋳物を鋳造する
方法において、前記ランナ部内面に絞り部を、１個所以
上段叶たことを特徴とするダイカスト鋳物の鋳造方法(1) Pressurize the molten metal inside the injection sleeve. A method of casting a die casting by injecting a biscuit part, a part of a runner, and a gate part into a cavity at high speed through a process, characterized in that the inner surface of the runner part is provided with a drawing part at one or more stages. Casting method for die casting
部の溶湯通路の断面積以上であることを特徴とする特許
請求の範囲第１項記載のダイカスト鋳物の鋳造方法(2) The method for casting a die-casting product according to claim 1, characterized in that the cross-sectional area of the molten metal passage in the throttle part is greater than or equal to the cross-sectional area of the molten metal passage in the gate part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20667882A JPS5997749A (en) | 1982-11-24 | 1982-11-24 | Casting method of die casting product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20667882A JPS5997749A (en) | 1982-11-24 | 1982-11-24 | Casting method of die casting product |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5997749A true JPS5997749A (en) | 1984-06-05 |
Family
ID=16527296
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20667882A Pending JPS5997749A (en) | 1982-11-24 | 1982-11-24 | Casting method of die casting product |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5997749A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04111479U (en) * | 1991-03-19 | 1992-09-28 | 株式会社学習研究社 | large paper clip |
| US6634412B1 (en) * | 1997-11-28 | 2003-10-21 | Commonwealth Scientific And Industrial Research Organisation | Magnesium pressure casting |
| CN107470579A (en) * | 2017-08-30 | 2017-12-15 | 安徽省含山县潮林铸管厂（普通合伙） | A kind of processing method for improving alloy electric machine casing mechanical property |
| US20200001357A1 (en) * | 2018-06-28 | 2020-01-02 | Toyota Jidosha Kabushiki Kaisha | Die casting apparatus |
| WO2022145109A1 (en) * | 2020-12-28 | 2022-07-07 | 株式会社ダイレクト２１ | Die-casting manufacturing method and apparatus |
| JP2022104370A (en) * | 2020-12-28 | 2022-07-08 | 株式会社ダイレクト２１ | Die cast production method and device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52892A (en) * | 1975-06-24 | 1977-01-06 | Teijin Ltd | Process for producing polyesters |
| JPS5465127A (en) * | 1977-11-04 | 1979-05-25 | Toyota Motor Co Ltd | Lip for casting molten metal |
-
1982
- 1982-11-24 JP JP20667882A patent/JPS5997749A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52892A (en) * | 1975-06-24 | 1977-01-06 | Teijin Ltd | Process for producing polyesters |
| JPS5465127A (en) * | 1977-11-04 | 1979-05-25 | Toyota Motor Co Ltd | Lip for casting molten metal |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04111479U (en) * | 1991-03-19 | 1992-09-28 | 株式会社学習研究社 | large paper clip |
| US6634412B1 (en) * | 1997-11-28 | 2003-10-21 | Commonwealth Scientific And Industrial Research Organisation | Magnesium pressure casting |
| US7121319B2 (en) | 1997-11-28 | 2006-10-17 | Commonwealth Scientific And Industrial Research Organisation | Magnesium pressure casting |
| CN107470579A (en) * | 2017-08-30 | 2017-12-15 | 安徽省含山县潮林铸管厂（普通合伙） | A kind of processing method for improving alloy electric machine casing mechanical property |
| US20200001357A1 (en) * | 2018-06-28 | 2020-01-02 | Toyota Jidosha Kabushiki Kaisha | Die casting apparatus |
| CN110653355A (en) * | 2018-06-28 | 2020-01-07 | 丰田自动车株式会社 | Die casting device |
| US10799945B2 (en) * | 2018-06-28 | 2020-10-13 | Toyota Jidosha Kabushiki Kaisha | Die casting apparatus |
| CN110653355B (en) * | 2018-06-28 | 2021-05-28 | 丰田自动车株式会社 | Die casting device |
| WO2022145109A1 (en) * | 2020-12-28 | 2022-07-07 | 株式会社ダイレクト２１ | Die-casting manufacturing method and apparatus |
| JP2022104370A (en) * | 2020-12-28 | 2022-07-08 | 株式会社ダイレクト２１ | Die cast production method and device |
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