JPH10138000A - Ejector pin - Google Patents
Ejector pinInfo
- Publication number
- JPH10138000A JPH10138000A JP31005596A JP31005596A JPH10138000A JP H10138000 A JPH10138000 A JP H10138000A JP 31005596 A JP31005596 A JP 31005596A JP 31005596 A JP31005596 A JP 31005596A JP H10138000 A JPH10138000 A JP H10138000A
- Authority
- JP
- Japan
- Prior art keywords
- shaped
- pin body
- ring
- groove
- rear end
- 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
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/40—Removing or ejecting moulded articles
- B29C45/4005—Ejector constructions; Ejector operating mechanisms
- B29C45/401—Ejector pin constructions or mountings
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Forging (AREA)
- Press Drives And Press Lines (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明はプレスや射出成型の
金型に使用するエジェクタピンの改良に関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in an ejector pin used for a press or an injection mold.
【０００２】[0002]
【従来の技術】一般に、プレスの金型には、成形された
製品を押出して排出するエジェクタピンが複数個取付け
られている。例えば金属板のプレス加工で使用する下型
は、図１０に示すようにダイ１の下方に、スプリング２
を介してバッキング３が可動自在に取付けられている。
このバッキング３にエジェクタピン４の後端側が挿着さ
れ、先端側は前記ダイ１を貫通してストリッププレート
５に接続され、成形された製品をストリッププレート５
で押出すようになっている。2. Description of the Related Art Generally, a plurality of ejector pins for extruding and discharging a molded product are attached to a press die. For example, a lower die used in press working of a metal plate includes a spring 2 below a die 1 as shown in FIG.
The backing 3 is movably mounted via the.
The back end of the ejector pin 4 is inserted into the backing 3, and the front end of the ejector pin 4 penetrates the die 1 and is connected to the strip plate 5.
It is designed to extrude.
【０００３】従来のエジェクタピン４は、丸棒状をなす
ピン本体８の後端側に、ピン本体８の外径Ｄ2 より外径
Ｄ1 が大きいツバ部９が形成されている。このツバ部９
はバッキング３の内部に形成された中空円筒状の嵌合溝
10内に挿着され、ツバ部９の後端面は、バッキング３に
接合した押えプレート11で支持された構造をなしてい
る。Conventional ejector pins 4, the rear end side of the pin body 8 forming a round bar, flange 9 outside diameter D 1 than the outer diameter D 2 of the pin body 8 is large is formed. This collar 9
Is a hollow cylindrical fitting groove formed in the backing 3
The rear end face of the collar portion 9 is inserted into the collar 10 and has a structure supported by a pressing plate 11 joined to the backing 3.
【０００４】プレス成形時に上型が下降してくると、パ
ンチとダイ１との間で金属板が成形され、成形部分が下
降して来ると、ストリッププレート５を押し下げ、この
ときの力がエジェクタピン４を介して押えプレート11に
加わり、スプリング３が伸びてバッキング３が下降す
る。上型が上昇するとスプリング２の弾性力でバッキン
グ３が上昇し、ここに取付けたエジェクタピン４を介し
てストリッププレート５が上昇して、成形された製品を
ダイ１から排出するようになっている。この排出する時
にエジェクタピン４に加わる力は僅かである。When the upper die is lowered during press forming, a metal plate is formed between the punch and the die 1. When the formed portion is lowered, the strip plate 5 is pressed down, and the force at this time is applied to the ejector. It is applied to the holding plate 11 via the pin 4, the spring 3 is extended, and the backing 3 is lowered. When the upper die rises, the backing 3 rises by the elastic force of the spring 2, the strip plate 5 rises via the ejector pins 4 attached thereto, and the formed product is discharged from the die 1. . The force applied to the ejector pin 4 at the time of discharging is slight.
【０００５】従来のエジェクタピン４を作成する場合、
図１１に示すように外径Ｄ1 の丸棒13を旋盤で加工し、
ツバ部９を残して先端側を外径Ｄ2 まで切削している。
また図１２に示すように先端側を外径Ｄ3 とし、中間部
を外径Ｄ2 とした段付のエジェクタピン４も同様に、外
径Ｄ1 の丸棒13のツバ部９を残して先端側を旋盤で加工
している。このため短いツバ部９以外の部分を全部切削
加工して除去するため、加工時間が長く、材料の歩留ま
りも悪いためコストが高くなる問題があった。[0005] When a conventional ejector pin 4 is made,
The round bar 13 having an outer diameter D 1 is processed on a lathe as illustrated in FIG. 11,
And cutting the distal end side to the outer diameter D 2 leaving the flange 9.
Also the outer diameter D 3 of the distal end side as shown in FIG. 12, the intermediate portion to the outer diameter D 2 and ejector pins 4 stepped was likewise leave flange 9 of the outer diameter D 1 of the round bar 13 The tip side is machined with a lathe. For this reason, there is a problem that since the entire portion other than the short brim portion 9 is cut and removed, the processing time is long and the yield of the material is low, so that the cost is increased.
【０００６】[0006]
【発明が解決しようとする課題】本発明は上記欠点を除
去し、加工部分を最小限にして、材料の歩留まりを向上
させて安価に製造できるエジェクタピンを提供するもの
である。SUMMARY OF THE INVENTION An object of the present invention is to provide an ejector pin which eliminates the above-mentioned drawbacks, minimizes the number of processed parts, improves the yield of materials, and can be manufactured at low cost.
【０００７】[0007]
【課題を解決するための手段】本発明の請求項１記載の
エジェクタピンは、丸棒状をなすピン本体の後端近傍に
溝を形成して、ここにピン本体の後端側の外周より突出
する抜け止め係止具を取付けたことを特徴とするもので
ある。The ejector pin according to the first aspect of the present invention has a groove formed near the rear end of the pin body having a round bar shape, and protrudes from the outer periphery of the rear end side of the pin body here. A retaining locking tool is attached.
【０００８】更に請求項２記載のエジェクタピンは、前
記溝をリング状に形成し、ここに取付ける抜け止め係止
具を軸用止め輪で形成したことを特徴とするものであ
る。Further, in the ejector pin according to the present invention, the groove is formed in a ring shape, and the retaining stopper which is attached thereto is formed by a retaining ring for a shaft.
【０００９】[0009]
【発明の実施の形態】以下本発明の実施の一形態を図１
ないし図４を参照して詳細に説明する。このエジェクタ
ピン４は、図１に示すように外径Ｄ2 の丸棒13で形成さ
れたピン本体８の後端近傍にリング状溝14が形成されて
いる。15は図２に示すようにバネ材で形成された外径Ｄ
1 のＥ形軸用止め輪で、これを前記リング状溝14に嵌め
て、図３に示すようにその外周がピン本体８の後端側の
外周より突出する抜け止め係止具となる。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention is shown in FIG.
This will be described in detail with reference to FIG. The ejector pin 4, the ring-shaped groove 14 is formed near the rear end of the pin body 8 formed by a round rod 13 having an outer diameter D 2 as shown in FIG. 15 is an outer diameter D formed of a spring material as shown in FIG.
The E-shaft retaining ring 1 is fitted in the ring-shaped groove 14 and serves as a retaining stopper whose outer periphery protrudes from the outer periphery on the rear end side of the pin body 8 as shown in FIG.
【００１０】このエジェクタピン４は図４に示すよう
に、バッキング３の内部に形成された内径がＤ1 より大
きい中空円筒状の嵌合溝10内に挿着され、Ｅ形軸用止め
輪15が嵌合溝10の上面に当接し、後端面はバッキング３
に接合した押えプレート11で支持される。[0010] The ejector pin 4, as shown in FIG. 4, formed within the inner diameter of the backing 3 is inserted into a larger hollow cylindrical fitting groove in 10 D, the retaining ring 15 for E-shaped shaft Abuts against the upper surface of the fitting groove 10 and the rear end surface
Is supported by the holding plate 11 joined to the holding member.
【００１１】プレス成形時に上型が下降してくると、パ
ンチとダイ１との間で金属板が成形され、成形部分が下
降して来ると、ストリッププレート５を押し下げ、この
ときの力がエジェクタピン４を介して押えプレート11に
加わり、スプリング２が伸びてバッキング３が下降す
る。この時の力は丸棒13であるピン本体８で受けること
になる。When the upper die is lowered during press forming, a metal plate is formed between the punch and the die 1. When the formed portion is lowered, the strip plate 5 is pressed down, and the force at this time is applied to the ejector. The pin 2 is applied to the holding plate 11 via the pin 4, the spring 2 is extended, and the backing 3 is lowered. The force at this time is received by the pin body 8 which is the round bar 13.
【００１２】また上型が上昇するとスプリング２の弾性
力でバッキング３が上昇し、ここに取付けたエジェクタ
ピン４を介してストリッププレート５が上昇して、成形
された製品をダイ１から排出するようになっている。こ
の排出する時にエジェクタピン４に加わる力は僅かであ
る。従って、Ｅ形軸用止め輪15には、ほとんど力が加わ
らずエジェクタピン４の単なる抜け止めとしての作用し
かなく、図１１に示す従来のような厚いツバ部９を残す
必要がない。When the upper die rises, the backing 3 rises by the elastic force of the spring 2, and the strip plate 5 rises via the ejector pins 4 attached thereto, so that the formed product is discharged from the die 1. It has become. The force applied to the ejector pin 4 at the time of discharging is slight. Therefore, the E-shaft retaining ring 15 is hardly applied with any force and acts only as a stopper for the ejector pin 4, and there is no need to leave the thick collar 9 as in the prior art shown in FIG. 11.
【００１３】図５は本発明の他の実施の形態を示すもの
で、外径Ｄ2 の丸棒13で形成されたピン本体８の後端近
傍にリング状溝14を形成し、ここに外径Ｄ1 のＥ形軸用
止め輪15を嵌め、ピン本体８の先端側を外径Ｄ3 に切削
加工した段付のエジェクタピン４である。この構造で
は、リング状溝14の加工と、先端側の切削加工だけであ
るので、図１２に示す従来のツバ部９を設けたものに比
べて加工コストが大幅に低減し、材料の歩留も向上させ
ることができる。[0013] Figure 5 shows another embodiment of the present invention, the ring-shaped groove 14 is formed near the rear end of the pin body 8 formed by a round rod 13 having an outer diameter D 2, the outer here fitting the E-shaped shaft for retaining ring 15 of diameter D 1, an ejector pin 4 the leading end of the stepped was machined to the outer diameter D 3 of the pin body 8. In this structure, only the processing of the ring-shaped groove 14 and the cutting of the tip end side are performed, so that the processing cost is greatly reduced as compared with the conventional one provided with the flange 9 shown in FIG. Can also be improved.
【００１４】図６は本発明の異なる他の実施の形態を示
すもので、ピン本体８の後端近傍に形成したリング状溝
14に、バネ材やプラスチックで形成されたＣ形軸用止め
輪15を嵌めて抜け止め係止具としたものである。FIG. 6 shows another embodiment of the present invention, in which a ring-shaped groove formed near the rear end of the pin body 8 is shown.
A C-shaft retaining ring 15 made of a spring material or plastic is fitted to 14 to form a retaining stopper.
【００１５】図７は本発明の異なる他の実施の形態を示
すもので、ピン本体８の後端近傍に貫通溝16を開孔し、
ここに段付の帯板17を挿着して、その両端を突出させて
抜け止め係止具としたエジェクタピン４である。FIG. 7 shows another embodiment of the present invention, in which a through groove 16 is opened near the rear end of the pin body 8.
The ejector pin 4 is provided with a stepped band plate 17 inserted therein and projecting at both ends thereof to serve as a retaining lock.
【００１６】図８および図９は本発明の異なる他の実施
の形態を示すもので、この抜け止め係止具は、Ｃ形のツ
バ板部18の片側に、一部切欠した円筒部19を一体にプラ
スチックで成型したものである。この抜け止め係止具は
図９に示すように、ピン本体８の後端近傍にリング状溝
14を形成し、プラスチックの弾性によりＣ形のツバ板部
18を広げてからリング状溝14に嵌めて、Ｃ形のツバ板部
18の外周をピン本体８の外周より突出させたものであ
る。この構造では、複数のエジェクタピン４を隣接して
配置する場合に、円筒部19があるので、Ｅ形軸用止め輪
15を用いた場合のように引っかかることがない。FIGS. 8 and 9 show another embodiment of the present invention. This stopper retainer has a cylindrical portion 19 partially cut away on one side of a C-shaped flange 18. It is molded integrally with plastic. As shown in FIG. 9, the retaining stopper is provided with a ring-shaped groove near the rear end of the pin body 8.
Form 14 and make C-shaped brim plate by plastic elasticity
Spread 18 and fit it into ring-shaped groove 14 to make C-shaped collar plate
The outer periphery of 18 protrudes from the outer periphery of the pin body 8. In this structure, when the plurality of ejector pins 4 are arranged adjacent to each other, since the cylindrical portion 19 is provided, the retaining ring for the E-shaped shaft is provided.
It does not get caught as in the case of using 15.
【００１７】なお本発明の抜け止め係止具は、上記構成
に限らずピン本体８の後端側の外径Ｄ1 より突出し、中
空円筒状の嵌合溝10から抜けない構造であれば他の構造
でも良い。[0017] Note that stop engaging end stop omission of the invention, protrude from the outer diameter D 1 of the rear end of the pin body 8 is not limited to the above structure, if the structure does not come out of the hollow cylindrical fitting groove 10 other The structure of may be sufficient.
【００１８】[0018]
【発明の効果】以上説明した如く本発明の請求項１記載
のエジェクタピンによれば、丸棒状をなすピン本体の後
端近傍に溝を形成して、ここにピン本体の外周より突出
する抜け止め係止具を取付けた簡単な構造であり、溝加
工と、必要に応じて先端側の切削加工だけであるので、
加工コストを大幅に低減し、材料の歩留も向上させるこ
とができる。As described above, according to the ejector pin of the first aspect of the present invention, a groove is formed in the vicinity of the rear end of the pin body in the shape of a round bar, and the protrusion protrudes from the outer periphery of the pin body here. Since it is a simple structure with a stop and locking device, only groove processing and, if necessary, cutting on the tip side,
The processing cost can be significantly reduced, and the yield of the material can be improved.
【００１９】また請求項２記載のエジェクタピンは、溝
をリング状に形成し、ここに取付ける抜け止め係止具を
軸用止め輪で形成したもので、加工や軸用止め輪の取付
が容易で、更に作業性を向上させ加工コストを安くする
ことができる。In the ejector pin according to the present invention, the groove is formed in a ring shape, and the retaining stopper to be attached thereto is formed by a retaining ring for the shaft, so that the processing and the mounting of the retaining ring for the shaft are easy. Thus, the workability can be further improved and the processing cost can be reduced.
【図面の簡単な説明】[Brief description of the drawings]
【図１】本発明の実施の一形態によるエジェクタピンの
水平断面図である。FIG. 1 is a horizontal sectional view of an ejector pin according to an embodiment of the present invention.
【図２】図１に示すエジェクタピンに取付けたＥ形軸用
止め輪の取付け状態を示す断面図である。FIG. 2 is a sectional view showing an attached state of an E-shaft retaining ring attached to the ejector pin shown in FIG. 1;
【図３】図１に示すエジェクタピンの斜視図である。FIG. 3 is a perspective view of the ejector pin shown in FIG.
【図４】図１に示すエジェクタピンを取付けた金型の断
面図である。FIG. 4 is a sectional view of a mold to which an ejector pin shown in FIG. 1 is attached.
【図５】本発明の他の実施の形態による段付エジェクタ
ピンを示す側面図である。FIG. 5 is a side view showing a stepped ejector pin according to another embodiment of the present invention.
【図６】エジェクタピンに取付けたＣ形軸用止め輪の取
付け状態を示す断面図である。FIG. 6 is a cross-sectional view showing a mounting state of a C-shaft retaining ring mounted on an ejector pin.
【図７】本発明の他の実施の形態による段付帯板の取付
け状態を示す断面図である。FIG. 7 is a sectional view showing an attached state of a stepped strip according to another embodiment of the present invention.
【図８】本発明の他の実施の形態による抜け止め係止具
を示す斜視図である。FIG. 8 is a perspective view showing a retaining lock according to another embodiment of the present invention.
【図９】図８に示す抜け止め係止具をピン本体のリング
状溝に取付けた状態を示す断面図である。FIG. 9 is a cross-sectional view showing a state where the retaining stopper shown in FIG. 8 is attached to a ring-shaped groove of the pin body.
【図１０】従来のエジェクタピンを取付けた金型の断面
図である。FIG. 10 is a cross-sectional view of a mold to which a conventional ejector pin is attached.
【図１１】従来のエジェクタピンを示す側面図である。FIG. 11 is a side view showing a conventional ejector pin.
【図１２】従来の段付エジェクタピンを示す側面図であ
る。FIG. 12 is a side view showing a conventional stepped ejector pin.
１ ダイ ２ スプリング ３ バッキング ４ エジェクタピン ５ ストリッププレート ８ ピン本体 ９ ツバ部 10 中空円筒状の嵌合溝 11 押えプレート 14 リング状溝 15 軸用止め輪 16 貫通溝 17 段付の帯板 18 Ｃ形のツバ板部 19 円筒部 Reference Signs List 1 die 2 spring 3 backing 4 ejector pin 5 strip plate 8 pin body 9 flange 10 hollow cylindrical fitting groove 11 holding plate 14 ring groove 15 shaft retaining ring 16 through groove 17 stepped strip plate 18 C type Collar plate part 19 Cylindrical part
Claims (2)
形成して、ここにピン本体の外周より突出する抜け止め
係止具を取付けたことを特徴とするエジェクタピン。1. An ejector pin, wherein a groove is formed in the vicinity of a rear end of a pin body in the shape of a round bar, and a retaining stopper protruding from an outer periphery of the pin body is attached to the groove.
抜け止め係止具を軸用止め輪で形成したことを特徴とす
る請求項１記載のエジェクタピン。2. The ejector pin according to claim 1, wherein the groove is formed in a ring shape, and the retaining stopper attached thereto is formed by a retaining ring for the shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31005596A JPH10138000A (en) | 1996-11-06 | 1996-11-06 | Ejector pin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31005596A JPH10138000A (en) | 1996-11-06 | 1996-11-06 | Ejector pin |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10138000A true JPH10138000A (en) | 1998-05-26 |
Family
ID=18000629
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31005596A Pending JPH10138000A (en) | 1996-11-06 | 1996-11-06 | Ejector pin |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10138000A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100845123B1 (en) | 2006-11-28 | 2008-07-09 | 주식회사 엘티 | Eject pin and manufacturing process thereof |
-
1996
- 1996-11-06 JP JP31005596A patent/JPH10138000A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100845123B1 (en) | 2006-11-28 | 2008-07-09 | 주식회사 엘티 | Eject pin and manufacturing process thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2002139013A (en) | Grooved nut and its manufacturing method | |
| JPH10138000A (en) | Ejector pin | |
| JP2976402B2 (en) | Earrings | |
| US4586736A (en) | Flush mounting cup for cabinet latch | |
| KR900004139Y1 (en) | Open - faced buttons | |
| KR930021281A (en) | Extrusion Die and Extrusion Process | |
| US3494168A (en) | Forming tool | |
| JP2564091B2 (en) | Die for extrusion of hollow material | |
| JPS6227376Y2 (en) | ||
| JP3131882B2 (en) | Method and apparatus for injection molding a molded article having a tunnel gate | |
| CN210586668U (en) | Built-in punching and blanking die structure | |
| JPH11247812A (en) | Fastener | |
| JPH026135U (en) | ||
| EP0502584A1 (en) | Identification tag for animals | |
| JPS6186042A (en) | Forging machine | |
| JP3046781U (en) | Ejector mechanism | |
| JP2532875B2 (en) | Manufacturing method of daicaster | |
| JP2716868B2 (en) | Mold manufacturing method | |
| JP3479523B2 (en) | Rear extrusion device | |
| JPS5855032Y2 (en) | Shape pencil | |
| JPS6354331B2 (en) | ||
| SU1657259A1 (en) | Combination die | |
| JP2720314B2 (en) | Washer with retaining ring and method of manufacturing the same | |
| JP3033155U (en) | Press forming machine | |
| JPS61116517A (en) | Mold |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20060127 |
|
| A131 | Notification of reasons for refusal |
Effective date: 20060207 Free format text: JAPANESE INTERMEDIATE CODE: A131 |
|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20060620 |