JP4790921B2

JP4790921B2 - Plunger tip for die casting

Info

Publication number: JP4790921B2
Application number: JP2001074409A
Authority: JP
Inventors: 光晴宮下
Original assignee: Ahresty Corp
Current assignee: Ahresty Corp
Priority date: 2001-03-15
Filing date: 2001-03-15
Publication date: 2011-10-12
Anticipated expiration: 2021-03-15
Also published as: JP2002273558A

Description

【０００１】
【発明の属する技術分野】
本発明は、ダイカスト鋳造において、射出スリーブ内に注湯された溶湯を金型のキャビティヘ射出するためのプランジャチップに関するものである。
【０００２】
【従来の技術】
この種のプランジャチップは、射出スリーブの内周面に常時摺接しているため、射出動作に伴ってその外周面が次第に摩耗するのは避けられないが、実際問題として、外周面全体が均等に摩耗するのではなく一部が摩耗（これを片減りと称する。）して使用不可になることが多い。
加えて、従来のダイカスト用プランジャチップでは、通常全体が一体的に構成されていたため、片減り（部分的摩耗）すると全体を交換しなければならなず、不経済であった。
【０００３】
この様な不具合を解消するべく、チップ本体の外周に射出スリーブの内径とほぼ同じ外径を有する摺接用外筒を回動自在に装着せしめたダイカスト用プランジャチップが提案された（実公平３−２１８１４号公報参照）。しかしこのプランジャチップの場合も、摺接用外筒の外周が片減りをするのは避けられず、片減りすれば摺接用外筒全体を交換しなければならなかった。
【０００４】
【発明が解決しようとする課題】
本発明はこのような従来の不具合に鑑みてなされたものであり、チップ本体の外周に射出スリーブの内径とほぼ同じ外径を有する摺接用外筒を装着せしめたダイカスト用プランジャチップにおいて、摺接用外筒が片減りしても摺接用外筒の全体を交換せずとも済み、且つ同じ摺接用外筒を長期にわたって使用することが可能なダイカスト用プランジャチップを提供せんとするものである。
【０００５】
【課題を解決するための手段】
斯かる目的を達成する本発明の請求項１記載のダイカスト用プランジャチップは、チップ本体の外周に、最初に装着された配列から配列方向の順番が入れ替えられた、射出スリーブの内径とほぼ同じ外径を有する複数個の摺接用外筒が装着されていることを特徴としたものである。
また、請求項２記載のダイカスト用プランジャチップは、前記摺接用外筒が、１個の幅広摺接用外筒と２個の幅狭摺接用外筒とからなり、上記幅広摺接用外筒の左右に幅狭の摺接用外筒を配置した事を特徴としたものである。
【０００６】
【発明の実施の形態】
以下、本発明の具体的な好適実施例を図面に基づいて詳細に説明するが、本発明は図示実施例のものに限定されるものではなく、いろいろなバリエーションが考えられる。
【０００７】
本発明に係るダイカスト用プランジャチップＡは、基本的に、チップ本体１と複数個の摺接用外筒２ａ，２ｂ，２ｃとで構成され、従来と同様に射出ロッド３の先端部３１にカップリング４を介して分離可能に取付けられ、ダイカスト機の射出スリーブ５内に射出動作が可能なように設置される。
【０００８】
チップ本体１は、先端方が閉塞され内部に冷却水室１１を有する略円柱形状に形成されると共に、先端方の外周縁に摺接用外筒２を抜け止めするための係止用鍔１２を周方向に囲繞突出形成し、係止用鍔１２とは反対側の基端方に、射出ロッド３の先端部３１にカップリング４を介して分離可能に連結され射出ロッド３の内部に形成された冷却水通路３２と上記冷却水室１１とを連通させるための連結部１３を軸方向に突出形成してなる。
尚、上記係止用鍔１２は、射出スリーブ５の内周面と摺接しないように、射出スリーブ５の内径よりも少し小径に形成することが好ましい。
【０００９】
そして、このチップ本体１の外周には、射出スリーブ５の内周面と直接摺接する複数個の摺接用外筒２ａ，２ｂ，２ｃをチップ本体１に対して分離可能に且つ入れ替え自由に装着せしめる。
【００１０】
各摺接用外筒２ａ，２ｂ，２ｃは、射出スリーブ５の内周面と適切に摺接し得るように、すなわち射出動作時に射出スリーブ５内周面との間に溶湯が差し込まないように、射出スリーブ５の内径とほぼ同じ外径を有し且つチップ本体１の外径とほぼ同じ内径を有する略円筒形状に形成してなり、それぞれチップ本体１の外周に分離可能に且つ入れ替え自由に嵌挿装着せしめる。
【００１１】
この際、チップ本体１の外周に装着する摺接用外筒２ａ，２ｂ，２ｃの個数や各摺接用外筒２ａ，２ｂ，２ｃの幅に格別制限があるわけではないが、複数個の摺接用外筒２ａ，２ｂ，２ｃをチップ本体１の外周に嵌挿装着した時に、チップ本体１の外周部分に丁度納まる幅にそれぞれ形成する。ちなみに、図示実施例にあっては、３個の摺接用外筒２ａ，２ｂ，２ｃをチップ本体１の外周に装着するようになし、そのうち１個（摺接用外筒２ｂ）を他の摺接用外筒２ａ，２ｃより少し幅広く形成し、幅広摺接用外筒２ｂの左右に幅狭の摺接用外筒２ａ，２ｃを配置したものである。
【００１２】
而して、本プランジャチップＡの使用に際しては、チップ本体１の外周に複数個（図示実施例にあっては、３個）の摺接用外筒２ａ，２ｂ，２ｃを分離可能且つ入れ替え自由に嵌挿装着せしめ、チップ本体１の先端方に囲繞突設した係止用鍔１２と押さえリング６とでガタつかないように押さえ込み、然る後に、チップ本体１の連結部１３と射出ロッド３の先端部３１とをカップリング４でもって一体的に連結させる。すると、本プランジャチップＡが射出ロッド３の先端部３１に一体的に取付けられ、射出ロッド３の内部に形成された冷却水通路３２とチップ本体１の冷却水室１１が連通する。尚、図中の符号７は、冷却水の漏れを防ぐためのＯ−リングを示す。
【００１３】
そして、射出動作に伴って各摺接用外筒２ａ，２ｂ，２ｃの外周面が片減りしたら（多くの場合、図１の符号（ｘ）で示す部分が片減りしやすい。）、上記取付け時と逆の手順により、各摺接用外筒２ａ，２ｂ，２ｃを一旦チップ本体１から取り外して、入れ替え、再装着する。
ここで、各摺接用外筒２ａ，２ｂ，２ｃを入れ替えるとは、それらの配列の順番を入れ替えることだけではなく、入れ替える前の状態から１８０°回転させてチップ本体１の外周に再装着することも含むものである。即ち、図１において、例えば、左端の幅狭摺接用外筒２ａの（ｘ）の部分が片減りした場合に、全部の摺接用外筒２ａ，２ｂ，２ｃを一旦チップ本体１から取り外し、それらの配列の順番を２ａ，２ｂ，２ｃから例えば２ｃ，２ｂ，２ａの順に入れ替えて再装着したり、または片減りした（ｘ）の部分が（ｙ）の場所に移動するように片減りした摺接用外筒２ａを軸方向と直交する方向に１８０°回転移動させてチップ本体１の外周に再装着したり、或いはこれらを組み合わせて入れ替えることを含むものである。この際、各摺接用外筒２ａ，２ｂ，２ｃを入れ替えるだけでなく、更に周方向に適宜な角度に回動させるようにしても良い。
【００１４】
【発明の効果】
本発明の請求項１に係るダイカスト用プランジャチップは斯様に、チップ本体の外周に、最初に装着された配列から配列方向の順番が入れ替えられた、射出スリーブの内径とほぼ同じ外径を有する複数個の摺接用外筒が装着されているので、一部の摺接用外筒が片減りしたような場合に、片減りした摺接用外筒の配列の順番を入れ替えてチップ本体１の外周に再装着されているので、片減りした部分を他の場所（位置）移動させた状態とすることができ、従って片減りした摺接用外筒を射出（鋳造）に悪影響を及ぼすことなく長期にわたって使用することが可能となり、一層のコストの低減化を期することが可能となる。
【００１６】
更に、本発明請求項２に係るダイカスト用プランジャチップによれば、摺接用外筒を、１個の幅広摺接用外筒と２個の幅狭摺接用外筒とで構成し、プランジャチップの中央にあってほとんど片減りしない場所に幅広の摺接用外筒を配置し、その幅広摺接用外筒の左右にプランジャチップの射出方向先端寄りにあって比較的片減りしやすい場所に幅狭の摺接用外筒を配置してなるので、幅狭の摺接用外筒が片減りして別の摺接用外筒と交換する必要が生じた場合でも、幅広の摺接用外筒よりも材料費（コスト）が安い幅狭の摺接用外筒を交換するだけで済み、更なるコストの低減化を期することが可能なる。
【図面の簡単な説明】
【図１】本発明実施の一例を示す一部切欠正面図。
【図２】同分解正面図。
【符号の説明】
Ａ：プランジャチップ
１：チップ本体１１：冷却水室
１２：係止用鍔
２ａ，２ｂ，２ｃ：摺接用外筒
３：射出ロッド４：カップリング
５：射出スリーブ６：押さえリング
７：Ｏ−リング[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a plunger tip for injecting molten metal poured into an injection sleeve into a cavity of a mold in die casting.
[0002]
[Prior art]
Since this type of plunger tip is always in sliding contact with the inner peripheral surface of the injection sleeve, it is inevitable that the outer peripheral surface gradually wears with the injection operation, but as a practical matter, the entire outer peripheral surface is evenly distributed. In many cases, some parts are worn rather than worn (referred to as partial reduction) and become unusable.
In addition, in the conventional die casting plunger tip, since the whole is usually integrally formed, if it is reduced (partially worn), the whole must be replaced, which is uneconomical.
[0003]
In order to solve such problems, there has been proposed a die casting plunger tip in which an outer cylinder for sliding contact having an outer diameter substantially the same as the inner diameter of the injection sleeve is rotatably mounted on the outer periphery of the tip body (actual 3) -21814). However, even in the case of this plunger tip, it is inevitable that the outer periphery of the sliding contact outer cylinder is partially reduced. If the plunger tip is reduced, the entire sliding contact outer cylinder must be replaced.
[0004]
[Problems to be solved by the invention]
The present invention has been made in view of such a conventional problem. In a die casting plunger tip in which a sliding contact outer cylinder having an outer diameter substantially the same as the inner diameter of an injection sleeve is mounted on the outer periphery of a tip body, It is not necessary to replace the entire sliding contact outer cylinder even if the contact outer cylinder is reduced, and to provide a die casting plunger tip that can use the same sliding contact outer cylinder over a long period of time. It is.
[0005]
[Means for Solving the Problems]
The plunger tip for die casting according to claim 1 of the present invention that achieves such an object has an outer periphery that is substantially the same as the inner diameter of the injection sleeve, in which the order of the arrangement direction is changed from the arrangement that is initially mounted on the outer periphery of the chip body. it is obtained by said being a plurality of sliding contact outer tube GaSo wear with a diameter.
The die casting plunger tip according to claim 2, wherein the sliding contact outer cylinder is composed of one wide sliding contact outer cylinder and two narrow sliding contact outer cylinders. A narrow sliding outer cylinder is arranged on the left and right sides of the outer cylinder.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, specific preferred embodiments of the present invention will be described in detail with reference to the drawings. However, the present invention is not limited to the illustrated embodiments, and various variations are conceivable.
[0007]
The die casting plunger tip A according to the present invention is basically composed of a tip body 1 and a plurality of sliding outer cylinders 2a, 2b, 2c, and a cup is attached to the tip 31 of the injection rod 3 as in the prior art. The ring 4 is separably attached and is installed in the injection sleeve 5 of the die casting machine so that an injection operation is possible.
[0008]
The tip body 1 is formed in a substantially columnar shape having a closed end and a cooling water chamber 11 inside, and a locking collar 12 for preventing the sliding outer cylinder 2 from slipping off to the outer periphery of the tip. Is formed so as to protrude in the circumferential direction, and is detachably connected to the distal end portion 31 of the injection rod 3 via the coupling 4 at the base end opposite to the locking rod 12. A connecting portion 13 for communicating the cooling water passage 32 and the cooling water chamber 11 is formed to protrude in the axial direction.
Note that the locking collar 12 is preferably formed to have a slightly smaller diameter than the inner diameter of the injection sleeve 5 so as not to be in sliding contact with the inner peripheral surface of the injection sleeve 5.
[0009]
A plurality of sliding contact outer cylinders 2a, 2b, 2c that are in direct sliding contact with the inner peripheral surface of the injection sleeve 5 are separable from the chip body 1 and can be freely replaced. Let me.
[0010]
Each sliding outer cylinder 2a, 2b, 2c can be properly slidably contacted with the inner peripheral surface of the injection sleeve 5, that is, the molten metal is not inserted between the inner peripheral surface of the injection sleeve 5 during the injection operation. It is formed in a substantially cylindrical shape having an outer diameter substantially the same as the inner diameter of the injection sleeve 5 and an inner diameter substantially the same as the outer diameter of the chip body 1, and is separably fitted to the outer periphery of the chip body 1 and can be freely replaced. Install it.
[0011]
At this time, the number of sliding contact outer cylinders 2a, 2b, 2c to be mounted on the outer periphery of the chip body 1 and the width of each sliding contact outer cylinder 2a, 2b, 2c are not particularly limited. When the sliding outer cylinders 2 a, 2 b, 2 c are fitted and mounted on the outer periphery of the chip body 1, the outer cylinders 2 a, 2 b, and 2 c are formed so as to fit in the outer periphery of the chip body 1. Incidentally, in the illustrated embodiment, three sliding contact outer cylinders 2a, 2b, 2c are mounted on the outer periphery of the chip body 1, one of which (sliding contact outer cylinder 2b) is the other. The outer cylinders 2a and 2c are formed slightly wider than the outer cylinders 2a and 2c for sliding contact, and the narrow outer cylinders 2a and 2c for sliding contact are arranged on the left and right sides of the outer cylinder 2b for wide sliding contact.
[0012]
Thus, when the plunger tip A is used, a plurality (three in the illustrated embodiment) of sliding contact outer cylinders 2a, 2b, 2c can be separated and freely replaced on the outer periphery of the tip body 1. Is inserted into and attached to the tip of the chip body 1 so as not to rattle between the locking hook 12 and the pressing ring 6, and then the connecting portion 13 of the chip body 1 and the injection rod 3 are pressed. The leading end portion 31 is integrally coupled with the coupling 4. Then, the plunger tip A is integrally attached to the tip portion 31 of the injection rod 3, and the cooling water passage 32 formed inside the injection rod 3 and the cooling water chamber 11 of the tip body 1 communicate with each other. In addition, the code | symbol 7 in a figure shows the O-ring for preventing the leakage of a cooling water.
[0013]
When the outer peripheral surfaces of the sliding contact outer cylinders 2a, 2b, and 2c are reduced by the injection operation (in many cases, the portion indicated by the symbol (x) in FIG. 1 is easily reduced), the attachment is performed. The sliding outer cylinders 2a, 2b, 2c are once removed from the chip body 1, replaced, and reattached in the reverse order of time.
Here, replacing each sliding contact outer cylinder 2a, 2b, 2c not only replaces the order of the arrangement, but also rotates 180 ° from the state before the replacement and reattaches it to the outer periphery of the chip body 1. It also includes things. That is, in FIG. 1, for example, when the portion (x) of the narrow-width outer cylinder 2a at the left end is reduced, all the outer cylinders 2a, 2b, 2c are once removed from the chip body 1. The order of those arrangements is changed from 2a, 2b, 2c to, for example, 2c, 2b, 2a and then reattached, or the reduced (x) part is moved to the position (y). That is, the sliding contact outer cylinder 2a is rotated 180 ° in the direction orthogonal to the axial direction and remounted on the outer periphery of the chip body 1 or is replaced in combination. At this time, not only the sliding contact outer cylinders 2a, 2b, 2c may be replaced, but may be further rotated at an appropriate angle in the circumferential direction.
[0014]
【The invention's effect】
The plunger tip for die casting according to claim 1 of the present invention thus has an outer diameter that is substantially the same as the inner diameter of the injection sleeve, in which the order of the arrangement direction is changed from the arrangement that is initially mounted on the outer periphery of the chip body. because it is a plurality of sliding contact barrel GaSo wear, when a portion of the sliding contact outer cylinder such as uneven usage, and change the order of the sequence of sliding contact outer cylinder was uneven usage chips Since it is remounted on the outer periphery of the main body 1, the part that has been reduced can be moved to another place (position), and thus the reduced outer cylinder for sliding contact is adversely affected by injection (casting). Therefore, it can be used over a long period of time without further reducing the cost, and the cost can be further reduced.
[0016]
Furthermore, according to the die-cast plunger tip according to claim 2 of the present invention, the sliding contact outer cylinder is composed of one wide sliding contact outer cylinder and two narrow sliding contact outer cylinders, and the plunger Place a wide sliding contact outer cylinder in the center of the tip where it is hardly reduced, and place it on the left and right sides of the wider sliding contact outer tube near the tip of the plunger tip in the injection direction. Since the narrow sliding contact outer cylinder is arranged on the bottom, even if the narrow sliding contact outer cylinder is reduced and replaced with another sliding contact outer cylinder, the wide sliding contact is required. It is only necessary to replace a narrow sliding contact outer cylinder whose material cost (cost) is lower than that of the outer cylinder, and further cost reduction can be expected.
[Brief description of the drawings]
FIG. 1 is a partially cutaway front view showing an example of the present invention.
FIG. 2 is an exploded front view of the same.
[Explanation of symbols]
A: Plunger tip 1: Tip body 11: Cooling water chamber 12: Locking rods 2a, 2b, 2c: Sliding outer cylinder 3: Injection rod 4: Coupling 5: Injection sleeve 6: Pressing ring 7: O- ring

Claims

Characterized in that the outer periphery of the chip body, the order of arrangement direction from the first mounting sequence has been replaced, and is an inner diameter substantially the same plurality of sliding contact outer tube having an outer diameter GaSo wear of the injection sleeve Die casting plunger tip.

The slidable contact outer cylinder is composed of one wide slidable contact outer cylinder and two narrow slidable contact outer cylinders. The plunger tip for die casting according to claim 1, wherein