JPS611461A - Casting method - Google Patents
Casting methodInfo
- Publication number
- JPS611461A JPS611461A JP12154684A JP12154684A JPS611461A JP S611461 A JPS611461 A JP S611461A JP 12154684 A JP12154684 A JP 12154684A JP 12154684 A JP12154684 A JP 12154684A JP S611461 A JPS611461 A JP S611461A
- Authority
- JP
- Japan
- Prior art keywords
- molten metal
- space
- pin
- sliding pin
- casting
- 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
- B22D17/24—Accessories for locating and holding cores or inserts
Abstract
Description
【発明の詳細な説明】
本発明は、型枠内に形成した鋳造用空間に溶湯を充填し
て凝固させるようにした鋳造方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a casting method in which a casting space formed in a mold is filled with molten metal and solidified.
従来から、型枠内に形成した鋳造用空間に溶湯を充填し
て凝固させるようにした鋳造方法は周知であり、また上
記鋳造用空間内に充填した溶湯が凝固する際に収縮する
ことも周知である。しかるに上記溶湯の収縮は、製品の
形状によってはわれや凹凸の原因となり、安定した品質
の製品が得られないことがあった。Conventionally, a casting method in which a casting space formed in a mold is filled with molten metal and solidified is well known, and it is also well known that the molten metal filled in the casting space contracts when it solidifies. It is. However, the shrinkage of the molten metal may cause cracks or unevenness depending on the shape of the product, making it impossible to obtain a product of stable quality.
本発明はそのような事情に鑑み、上記鋳造用空間内に摺
動ピンを突出させるとともに、その摺動ピンを、上記鋳
造用空間内に充填した溶湯が完全に凝固する以前に後退
させることにより、製品にわれや凹凸が生じるのを防止
できるようにした鋳造方法を提供するものである。In view of such circumstances, the present invention protrudes a sliding pin into the casting space and retreats the sliding pin before the molten metal filled in the casting space completely solidifies. The present invention provides a casting method that can prevent cracks and unevenness from occurring in the product.
以下図示実施例について本発明を説明すると、図におい
て、１は図示しない固定部材に固定した固定型、２は図
示しないシリンダ装置によってその固定型ｌに圧接され
る可動型で、固定型１および可動型２によって鋳造用空
間３を形成するようにしている。The present invention will be described below with reference to the illustrated embodiment. In the figure, 1 is a fixed mold fixed to a fixed member (not shown), 2 is a movable mold that is pressed against the fixed mold l by a cylinder device (not shown), and the fixed mold 1 and the movable A casting space 3 is formed by the mold 2.
上記固定型ｌには、その表面に溶湯を流通させる湯道４
を形成するとともに、この湯道４に連通させたスリーブ
５を設け、このスリーブ５内で射出プランジャ６を前進
させることにより、スリーブ５内に注入した溶湯を上記
湯道４を介して鋳造用空間３内に充填できるようにして
いる。他方、上記可動枠２には中子としての摺動ピン７
を摺動自在に嵌合し、その先端を上記鋳造用空間３に臨
ませるとともに末端を上記可動枠２に設けた図示しない
シリンダ装置に連動させている。The above-mentioned fixed type l has a runner 4 that allows the molten metal to flow on its surface.
At the same time, a sleeve 5 is provided which communicates with the runner 4, and by moving the injection plunger 6 forward within the sleeve 5, the molten metal injected into the sleeve 5 passes through the runner 4 into the casting space. It is designed to be able to fill up to 3. On the other hand, the movable frame 2 has a sliding pin 7 as a core.
are fitted in a slidable manner so that their tips face the casting space 3 and their ends are interlocked with a cylinder device (not shown) provided on the movable frame 2.
図示実施例では、上記鋳造用空間３は概略円板状に形成
してあり、上記摺動ピン７はその鋳造用空間３の軸部に
鋳造用空間３の軸方向長さの約２／３程度まで突出させ
ているが、製品形状によっては適宜の突出量とすること
ができる。In the illustrated embodiment, the casting space 3 is formed approximately in the shape of a disk, and the sliding pin 7 is attached to the shaft of the casting space 3 by about 2/3 of the axial length of the casting space 3. Although the protrusion is made to a certain extent, the protrusion amount can be set as appropriate depending on the shape of the product.
以上の構成において、鋳造を行なうには、まず図示しな
いシリンダ装置によって可動型２を前進させ、その可動
型２を固定型１に圧接させて鋳造用空間３を形成すると
ともに、摺動ピン７を前進させてその摺動ピン７を鋳造
用空間３内に突出させる。In the above configuration, in order to perform casting, the movable mold 2 is first advanced by a cylinder device (not shown), the movable mold 2 is brought into pressure contact with the fixed mold 1 to form the casting space 3, and the sliding pin 7 is moved forward. The sliding pin 7 is moved forward to protrude into the casting space 3.
この状態となったら上記スリーブ５内に溶湯を注入し、
次に射出プランジャ６を前進させてそのスリーブ５内に
注入した溶湯を１−記湯道４を介して鋳造用空間３内に
充填する。そして上記鋳造用空間３内に溶湯を充填した
ら、その鋳造用空間３内の溶湯が完全に凝固する以前に
、かつ摺動ピン７の周囲の溶湯が凝固した後、例えば溶
湯の充填終了後１秒程度で上記摺動ピン７を後退させる
。When this state is reached, pour the molten metal into the sleeve 5,
Next, the injection plunger 6 is advanced to fill the casting space 3 with the molten metal injected into the sleeve 5 via the runner channel 4. When the casting space 3 is filled with molten metal, before the molten metal in the casting space 3 completely solidifies, and after the molten metal around the sliding pin 7 has solidified, for example, 1 after filling the molten metal. The sliding pin 7 is moved back in about seconds.
このとき従来のように、摺動ピン７すなわち中子を後退
させない場合には、製品の形状によっては溶湯の凝固時
の収縮によってその摺動ピン７の周囲にわれが生じ、製
品取出し時に製品がバラバラになったり、製品がバラバ
ラにならないまでも表面に凹凸が生じて大きな削り代を
取らないと製品として完成させることができないといっ
た問題が生じていた。At this time, if the sliding pin 7, that is, the core, is not retreated as in the conventional case, depending on the shape of the product, cracks may occur around the sliding pin 7 due to shrinkage during solidification of the molten metal, and the product may be damaged when taken out. There were problems in that the product would fall apart, or even if the product did not fall apart, the surface would become uneven, making it impossible to complete the product without removing a large cutting allowance.
これに対して本実施例では、鋳造用空間３内の溶湯が完
全に凝固する以前に上記摺動ピン７を後退させているの
で、溶湯は摺動ピン７の存在していた空間内に自由に収
縮しながら凝固することができるようになり、これによ
り−上記われや凹凸の発生を抑制することができるよう
になる。また摺動ピン７に溶湯の収縮によって応力が加
わることや、溶湯から摺動ピン７への熱の伝達が良好に
防止できるので、その摺動ピン７の耐久性の向ヒを図る
ことができるとともに摺動ピン７が可動枠２に焼付くこ
とが防止できる。On the other hand, in this embodiment, since the sliding pin 7 is moved back before the molten metal in the casting space 3 completely solidifies, the molten metal is free to flow into the space where the sliding pin 7 was. It becomes possible to solidify while shrinking, thereby making it possible to suppress the occurrence of the above-mentioned cracks and unevenness. In addition, it is possible to effectively prevent stress from being applied to the sliding pin 7 due to contraction of the molten metal and heat transfer from the molten metal to the sliding pin 7, thereby improving the durability of the sliding pin 7. At the same time, it is possible to prevent the sliding pin 7 from seizing on the movable frame 2.
この後、上記鋳造用空間３内の溶湯が完全に凝固したら
、又は少なくとも一対の型枠１．２に接する部分の溶湯
が凝固したら、上記可動型２を後退させて一対の型枠１
．２を開き、製品の取出しを行なう。本実施例において
はその際においても、製品が摺動ピン７に収縮によって
強固に連結されることがないので、その取出しを容易に
行なうことができる。そして製品の取出しが完了すれば
、以後は上述と同様にして新たな製品の鋳造が行なわれ
る。Thereafter, when the molten metal in the casting space 3 has completely solidified, or when the molten metal in the portions that contact at least the pair of molds 1.2 has solidified, the movable mold 2 is moved back and the molds 1.
．． 2 and take out the product. In this embodiment, even at that time, the product is not firmly connected to the sliding pin 7 due to contraction, so that it can be easily taken out. Once the removal of the product is completed, a new product is then cast in the same manner as described above.
なお、上記実施・例は一般的な鋳造方法について説明し
たものであるが、上記摺動ピン７を加圧鋳造方法におけ
る加圧ピンとして利用してもよい。Although the above embodiments and examples describe a general casting method, the sliding pin 7 may be used as a pressure pin in a pressure casting method.
すなわち、加圧鋳造方法は、ダイカスト製品の鋳巣をな
くし−Ｃ強度や気密性を向上させるために鋳造時に凝固
完了以前の溶湯を加圧する方法であり、溶湯を加圧する
加圧ピンとして上記摺動ピン７を利用し、溶湯の充填時
にはその摺動ピン７を−後退位置に位置させておき、溶
湯を上記鋳造用空間３に充填したら、直ちに若しくは所
要時間経過後にその摺動ピン７を前進させて鋳造用空間
３内の溶湯を加圧させるようにすることができる。そし
てこの場合においても、鋳造用空間３内の溶湯が完全に
凝固する以前に上記摺動ピン７を後退させることは勿論
である。In other words, the pressure casting method is a method in which the molten metal is pressurized before solidification is completed during casting in order to eliminate cavities in die-cast products and improve C strength and airtightness. When filling the molten metal using the moving pin 7, the sliding pin 7 is placed in the -retracted position, and once the casting space 3 is filled with the molten metal, the sliding pin 7 is moved forward immediately or after a required period of time has elapsed. Thus, the molten metal in the casting space 3 can be pressurized. Also in this case, it goes without saying that the sliding pin 7 should be moved back before the molten metal in the casting space 3 is completely solidified.
以］二のように、本発明は、鋳造用空間内に突出させた
摺動ピンを、その鋳造用空間内に充填した溶湯が完全に
凝固する以前に後退させるようにしたものであるから、
製品にわれや凹凸が生じるのを可及的に防止することが
できるようになるという効果が得られる。As described in [2] above, in the present invention, the sliding pin protruding into the casting space is made to retreat before the molten metal filled in the casting space completely solidifies.
The effect is that it is possible to prevent cracks and unevenness on the product as much as possible.
図は本発明の一実施例を示す断面図である。 The figure is a sectional view showing one embodiment of the present invention.
Claims (1)
に鋳造用空間を形成した後、その鋳造用空間内に溶湯を
充填するようにした鋳造方法において、上記鋳造用空間
内に摺動ピンを突出させるとともに、その摺動ピンを、
上記鋳造用空間内に充填した溶湯が完全に凝固する以前
に後退させることを特徴とする鋳造方法。A casting method in which at least a pair of molds are pressed against each other to form a casting space therein, and then the casting space is filled with molten metal, wherein a sliding pin is inserted into the casting space. At the same time as protruding the sliding pin,
A casting method characterized in that the molten metal filled in the casting space is retreated before it completely solidifies.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12154684A JPS611461A (en) | 1984-06-13 | 1984-06-13 | Casting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12154684A JPS611461A (en) | 1984-06-13 | 1984-06-13 | Casting method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS611461A true JPS611461A (en) | 1986-01-07 |
Family
ID=14813922
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12154684A Pending JPS611461A (en) | 1984-06-13 | 1984-06-13 | Casting method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS611461A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62101366A (en) * | 1985-10-29 | 1987-05-11 | Mazda Motor Corp | Molten metal forging device |
| JPH01122650A (en) * | 1987-11-05 | 1989-05-15 | Honda Motor Co Ltd | Method for pulling out pin for hole as-cast in casting apparatus |
| JPH01321062A (en) * | 1988-06-24 | 1989-12-27 | Toyota Motor Corp | Method for separating sprue in high pressure casting |
| EP0815988A1 (en) * | 1996-06-24 | 1998-01-07 | Toyota Jidosha Kabushiki Kaisha | Method of force-fitting separate member into casting and apparatus therefor |
| US5711364A (en) * | 1995-08-30 | 1998-01-27 | Toyota Jidosha Kabushiki Kaisha | Method of and apparatus for casting pipe |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51104429A (en) * | 1975-03-12 | 1976-09-16 | Sadakichi Sugimura | Daikyasutochuzono ketsukanboshiho |
| JPS5797861A (en) * | 1980-12-10 | 1982-06-17 | Toyota Motor Corp | Pressure casting method |
-
1984
- 1984-06-13 JP JP12154684A patent/JPS611461A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51104429A (en) * | 1975-03-12 | 1976-09-16 | Sadakichi Sugimura | Daikyasutochuzono ketsukanboshiho |
| JPS5797861A (en) * | 1980-12-10 | 1982-06-17 | Toyota Motor Corp | Pressure casting method |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62101366A (en) * | 1985-10-29 | 1987-05-11 | Mazda Motor Corp | Molten metal forging device |
| JPH01122650A (en) * | 1987-11-05 | 1989-05-15 | Honda Motor Co Ltd | Method for pulling out pin for hole as-cast in casting apparatus |
| JPH01321062A (en) * | 1988-06-24 | 1989-12-27 | Toyota Motor Corp | Method for separating sprue in high pressure casting |
| US5711364A (en) * | 1995-08-30 | 1998-01-27 | Toyota Jidosha Kabushiki Kaisha | Method of and apparatus for casting pipe |
| EP0815988A1 (en) * | 1996-06-24 | 1998-01-07 | Toyota Jidosha Kabushiki Kaisha | Method of force-fitting separate member into casting and apparatus therefor |
| US5960852A (en) * | 1996-06-24 | 1999-10-05 | Toyota Jidosha Kabushiki Kaisha | Method of force-fitting separate member into casting and apparatus therefor |
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