JPH08197592A - Ejection pin - Google Patents
Ejection pinInfo
- Publication number
- JPH08197592A JPH08197592A JP1279995A JP1279995A JPH08197592A JP H08197592 A JPH08197592 A JP H08197592A JP 1279995 A JP1279995 A JP 1279995A JP 1279995 A JP1279995 A JP 1279995A JP H08197592 A JPH08197592 A JP H08197592A
- Authority
- JP
- Japan
- Prior art keywords
- air
- air escape
- escape groove
- pin
- cavity
- 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
- B29C45/26—Moulds
- B29C45/34—Moulds having venting means
-
- 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
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/44—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles
- B29C33/442—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles with mechanical ejector or drive means therefor
-
- 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)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、例えば射出成形金型
の金型本体に設けられたピン孔に軸方向に進退自在に挿
入し、先端面を金型本体のキャビティに対向し、離型時
に成形品を突き出す突き出しピンに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention, for example, inserts into a pin hole provided in a mold body of an injection molding die so as to be able to advance and retreat in the axial direction, and has a tip end surface facing a cavity of the die body and releasing the mold. It relates to a push pin that sometimes pushes out a molded product.
【０００２】[0002]
【従来の技術】例えば、射出成形用金型においては、固
定金型と可動金型とからなる金型本体にキャビティが設
けられ、射出成形機のノズルから射出された加熱溶融樹
脂が固定金型に設けられたスプルーおよびランナーを介
してキャビティに注入される。このとき、キャビティの
内部にはエアが溜っており、樹脂の注入時に溜ったエア
をキャビティから排出する必要があり、エアの排出が不
十分であると、樹脂がキャビティの隅々まで行き渡らな
いという問題がある。2. Description of the Related Art For example, in an injection molding die, a cavity is provided in a die body composed of a fixed die and a movable die, and a heated molten resin injected from a nozzle of an injection molding machine is used as the fixed die. It is injected into the cavity through the sprue and runner provided in the. At this time, air is accumulated inside the cavity, and it is necessary to discharge the accumulated air from the cavity when injecting the resin. If the air is not sufficiently discharged, the resin will not spread to every corner of the cavity. There's a problem.
【０００３】また、加熱溶融樹脂の注入時に、樹脂から
ガスが発生し、このガスを速やかに排出しないと、前述
のような充填不足や焼けが発生する問題がある。しかし
ながら、従来においては、エア抜きは余り重要視されて
おらず、固定金型と可動金型との接合面の精度、入れ子
の嵌合精度あるいは突き出しピンの嵌め合い公差等によ
って生じる隙間からエアを逃していた。つまり、前記隙
間はエアは通過するが、溶融樹脂は通過しない微小隙間
であるため、キャビティの内部に注入される溶融樹脂の
圧力によってエアが押し出されるようになっている。In addition, when the heated molten resin is injected, a gas is generated from the resin, and if the gas is not quickly discharged, the above-mentioned insufficient filling and burning occur. However, in the past, air bleeding has not been considered so important, and air is removed from the gap created by the accuracy of the joint surface between the fixed mold and the movable mold, the fitting accuracy of the insert, or the fitting tolerance of the ejector pin. I was missing. That is, the air passes through the gap, but the molten resin does not pass through the gap. Therefore, the air is pushed out by the pressure of the molten resin injected into the cavity.
【０００４】しかし、成形時にガス焼けやショート部が
できることがあり、経験上、エア抜きを必要とする場合
には複数枚の薄板を重ね合わせたエア抜き入れ子を追加
したものも実施されている。However, gas burning or short-circuiting may occur during molding, and experience shows that when air bleeding is required, an air bleeding insert in which a plurality of thin plates are stacked is added.
【０００５】[0005]
【発明が解決しようとする課題】ところで、前述のよう
に構成されたエア逃し手段としてのエア抜き入れ子は、
金型本体に対して固定的に設けられるもので、樹脂や異
物によって目詰りした場合には金型を分解し、エア抜き
入れ子を取り外して掃除するか、エア抜き入れ子を新し
いものと交換する必要があり、その作業が面倒であっ
た。By the way, the air vent inserter as the air releasing means constructed as described above,
It is fixedly installed on the mold body, and if it is clogged with resin or foreign matter, it is necessary to disassemble the mold and remove the air vent insert and clean it, or replace the air vent insert with a new one. There was, and the work was troublesome.
【０００６】この発明は、前記事情に着目してなされた
もので、その目的とするところは、キャビティの内部の
エアを効率よく排出することができ、また長期の使用に
おいても、目詰りの発生を防止できる突き出しピンを提
供することにある。The present invention has been made in view of the above circumstances. The purpose of the present invention is to efficiently discharge the air inside the cavity and to prevent clogging even during long-term use. It is to provide a protruding pin that can prevent the above.
【０００７】[0007]
【課題を解決するための手段および作用】この発明は、
前述した目的を達成するために、請求項１は、金型本体
にピン孔を設け、このピン孔に突き出しピン本体を軸方
向に進退自在に挿入し、この突き出しピン本体の先端面
を金型本体のキャビティに対向し、離型時に成形品を突
き出す突き出しピンにおいて、前記突き出しピン本体の
先端部近傍を前記ピン孔より小径に形成し、前記キャビ
ティ内のエアを金型本体の排気通路に逃すエア逃し部を
形成したことを特徴とする。Means and Actions for Solving the Problems
In order to achieve the above-mentioned object, the first aspect of the present invention is to provide a pin body with a pin hole, and insert the ejecting pin body into the pin hole so as to advance and retract in the axial direction. In the ejection pin that faces the cavity of the main body and ejects the molded product at the time of mold release, the vicinity of the tip of the ejection pin main body is formed with a diameter smaller than the pin hole, and the air in the cavity is released to the exhaust passage of the mold main body. It is characterized in that an air escape portion is formed.
【０００８】請求項２は、前記突き出しピン本体の先端
部近傍の外周面に環状のエア逃し溝を設け、このエア逃
し溝より先端側を前記ピン孔より小径に形成し、前記キ
ャビティ内のエアをエア逃し溝に逃す隙間からなる第１
のエア逃し部とし、前記エア逃し溝より基端側にカット
面を形成し、前記エア逃し溝内のエアを金型本体の排気
通路に逃す第２のエア逃し部としたことを特徴とする。According to a second aspect of the present invention, an annular air escape groove is provided on the outer peripheral surface near the tip of the protruding pin body, and the tip side of the air escape groove is formed to have a diameter smaller than that of the pin hole. The first that consists of a gap that allows air to escape to the air escape groove
And a cut surface is formed on the base end side of the air escape groove to form a second air escape portion for allowing the air in the air escape groove to escape to the exhaust passage of the mold body. .
【０００９】請求項３は、前記突き出しピン本体の先端
部近傍の外周面に環状のエア逃し溝を設け、このエア逃
し溝より先端側を真円のピン孔に対して楕円とし、前記
キャビティ内のエアをエア逃し溝に逃す隙間からなる第
１のエア逃し部とし、前記エア逃し溝より基端側にカッ
ト面を形成し、前記エア逃し溝内のエアを金型本体の排
気通路に逃す第２のエア逃し部としたことを特徴とす
る。According to a third aspect of the present invention, an annular air escape groove is provided on the outer peripheral surface of the protruding pin body in the vicinity of the tip end portion, and the tip end side of the air escape groove is an ellipse with respect to a perfect circular pin hole. The air in the air escape groove is formed as a first air escape portion, and a cut surface is formed on the base end side of the air escape groove to escape the air in the air escape groove to the exhaust passage of the mold body. It is characterized in that it is a second air escape portion.
【００１０】キャビティ内のエアは、ピン孔と突き出し
ピンの先端部と間の隙間から逃げて外部に排出されると
共に、金型本体の離型時には相対的にキャビティの内部
に突出して成形品を突き出すことができ、エア抜き機能
と成形品の突き出し機能を兼ね備えることができる。The air in the cavity escapes from the gap between the pin hole and the tip of the protruding pin and is discharged to the outside. At the time of releasing the mold body, the air relatively projects into the cavity to form a molded product. It can be ejected, and can have both an air bleeding function and a molded product ejection function.
【００１１】[0011]
【実施例】以下、この発明の各実施例を図面に基づいて
説明する。図１および図２は第１の実施例を示す。図１
は突き出しピンを示し、図２は突き出しピンを組み込ん
だ成形用金型を示す。まず、成形用金型について説明す
ると、１は金型本体で、これは固定金型２と可動金型３
とから構成されている。固定金型２と可動金型３との間
には加熱溶融樹脂が注入されるキャビティ４が設けられ
ている。Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show a first embodiment. FIG.
Shows an ejection pin, and FIG. 2 shows a molding die incorporating the ejection pin. First, the molding die will be described. 1 is a die body, which is a fixed die 2 and a movable die 3.
It consists of and. A cavity 4 into which the heated molten resin is injected is provided between the fixed mold 2 and the movable mold 3.
【００１２】固定金型２には射出成形機のノズル（図示
しない）と当接するノズルタッチ面を有するスプルー５
が設けられ、このスプルー５はランナー６を介して前記
キャビティ４に連通している。可動金型３にはキャビテ
ィ４を構成するコア７および突き出しプレート８が設け
られ、この突き出しプレート８にはコア７を貫通して前
記キャビティ４まで延長する突き出しピン９が設けられ
ている。The fixed mold 2 has a sprue 5 having a nozzle touch surface that comes into contact with a nozzle (not shown) of an injection molding machine.
Is provided, and the sprue 5 communicates with the cavity 4 via a runner 6. The movable mold 3 is provided with a core 7 and a projecting plate 8 which form a cavity 4, and the projecting plate 8 is provided with a projecting pin 9 which extends through the core 7 to the cavity 4.
【００１３】すなわち、前記コア７には突き出しピン９
が軸方向に進退自在に挿入されるピン孔１０が穿設され
ており、成形後、金型本体１の離型に伴って成形品を突
き出す際に、突き出しピン９を相対的にキャビティ４内
に突出させて成形品をコア７から突き出すことができる
ようになっている。That is, the core 7 has a protrusion pin 9
Has a pin hole 10 inserted therein so as to be able to advance and retreat in the axial direction. When the molded product is ejected as the mold body 1 is released from the mold after molding, the ejector pin 9 is relatively inserted in the cavity 4. It is possible to project the molded product from the core 7 by projecting the molded product.
【００１４】突き出しピン９について説明すると、図１
に示すように、突き出しピン本体１１は円柱棒状体であ
り、この先端部近傍の外周面には環状のエア逃し溝１２
が設けられている。このエア逃し溝１２より先端側は突
き出しピン本体１１より小径、つまり前記ピン孔１０の
先端側の孔径より小径に形成され、前記キャビティ４内
のエアをエア逃し溝１２に逃す隙間からなる第１のエア
逃し部１３が形成されている。この第１のエア逃し部１
３を形成する隙間は、エアは通過するが、溶融樹脂は通
過しない微小隙間であり、キャビティ４の内部に注入さ
れる溶融樹脂の圧力によってキャビティ４内のエアが押
し出されるようになっている。The protrusion pin 9 will be described with reference to FIG.
As shown in FIG. 3, the protruding pin body 11 is a cylindrical rod-shaped body, and the annular air escape groove 12 is formed on the outer peripheral surface near the tip end portion.
Is provided. The tip side of the air escape groove 12 is formed to have a diameter smaller than that of the protruding pin body 11, that is, a diameter smaller than the hole diameter of the tip side of the pin hole 10 to form a gap for allowing the air in the cavity 4 to escape to the air escape groove 12. The air escape portion 13 is formed. This first air escape portion 1
The gap forming 3 is a minute gap through which the air passes but the molten resin does not pass, and the air in the cavity 4 is pushed out by the pressure of the molten resin injected into the cavity 4.
【００１５】さらに、突き出しピン本体１１のエア逃し
溝１２より基端側には側壁の一部を平坦面にカットし、
前記エア逃し溝１２内のエアを金型本体１の排気通路１
５に逃す第２のエア逃し部１４が設けられている。排気
通路１５はピン孔１０の基端側を大径に形成することに
より構成され、金型本体１の外部に連通している。Further, a part of the side wall is cut into a flat surface on the base end side of the air release groove 12 of the protruding pin main body 11,
The air in the air escape groove 12 is exhausted through the exhaust passage 1 of the mold body 1.
A second air escape portion 14 is provided to escape to the air conditioner 5. The exhaust passage 15 is configured by forming the base end side of the pin hole 10 to have a large diameter, and communicates with the outside of the mold body 1.
【００１６】このように構成された突き出しピン９によ
れば、射出成形機のノズルから射出された加熱溶融樹脂
が、スプルー５からランナー６を介してキャビティ４に
注入されると、その溶融樹脂の注入圧力によってキャビ
ティ４内のエアが第１のエア逃し部１３の隙間を通って
エア逃し溝１２に押し出される。エア逃し溝１２に押し
出されたエアは第２の逃し部１４を通って排気通路１５
から金型本体１の外部に放出される。また、溶融樹脂の
注入時に、樹脂からガスが発生しても、このガスのエア
と一緒に排出でき、充填不足や焼けを防止できる。According to the ejection pin 9 thus constructed, when the heated molten resin injected from the nozzle of the injection molding machine is injected into the cavity 4 from the sprue 5 through the runner 6, the molten resin The air in the cavity 4 is pushed out to the air escape groove 12 through the gap of the first air escape portion 13 by the injection pressure. The air pushed into the air escape groove 12 passes through the second escape portion 14 and the exhaust passage 15
Is discharged to the outside of the mold body 1. Further, even if gas is generated from the resin at the time of injecting the molten resin, the gas can be discharged together with the air, and insufficient filling or burning can be prevented.
【００１７】したがって、キャビティ４に注入された溶
融樹脂はキャビティ４の隅々まで行き渡り、キャビティ
４の全域に亘って均一に充填されることになり、品質の
高い成形品を成形することができる。Therefore, the molten resin injected into the cavity 4 reaches every corner of the cavity 4 and is uniformly filled over the entire area of the cavity 4, so that a high quality molded product can be molded.
【００１８】また、キャビティ４内の溶融樹脂が冷却固
化されたのち、固定金型２と可動金型３を離型すると、
突き出しプレート８に固定された突き出しピン９が相対
的に突出してキャビティ４内の成形品を突き出すことが
できる。したがって、突き出しピン９は、本来の目的で
ある成形品の突き出し機能とキャビティ４内のエアを抜
く、エア抜き機能とを兼ね備えている。また、突き出し
ピン９の先端部は突き出し時にコア７から突出するた
め、例え第１の逃し部１３に溶融樹脂が入り込んでも、
突き出し時にその樹脂を排出することができ、樹脂によ
る目詰まりを防止できる。After the molten resin in the cavity 4 is cooled and solidified, the fixed mold 2 and the movable mold 3 are released from each other.
The ejection pin 9 fixed to the ejection plate 8 relatively protrudes to eject the molded product in the cavity 4. Therefore, the ejection pin 9 has both the original purpose of ejecting a molded product and the function of bleeding air from the cavity 4. Further, since the tip end portion of the protrusion pin 9 protrudes from the core 7 during protrusion, even if molten resin enters the first relief portion 13,
The resin can be discharged at the time of protrusion, and clogging by the resin can be prevented.
【００１９】図３は第２の実施例を示すもので、突き出
しピン本体１１は円柱棒状体であり、この先端部近傍の
外周面には環状のエア逃し溝１２が設けられている。こ
のエア逃し溝１２より先端側は楕円に形成されている。
つまり前記ピン孔１０は真円であるのに対し、突き出し
ピン本体１１のエア逃し溝１２より先端側は楕円形状
で、その短径部分の外周面とピン孔１０の内周面との間
に、前記キャビティ４内のエアをエア逃し溝１２に逃す
隙間からなる第１のエア逃し部１６が形成されている。
この第１のエア逃し部１６を形成する隙間は、エアは通
過するが、溶融樹脂は通過しない微小隙間であり、キャ
ビティ４の内部に注入される溶融樹脂の圧力によってキ
ャビティ４内のエアが押し出されるようになっている。
その他の構成は第１の実施例と同じである。FIG. 3 shows a second embodiment, in which the ejecting pin body 11 is a cylindrical rod-shaped body, and an annular air escape groove 12 is provided on the outer peripheral surface near the tip portion. The tip side of the air escape groove 12 is formed into an ellipse.
That is, while the pin hole 10 is a perfect circle, the tip end side of the air escape groove 12 of the protruding pin body 11 is elliptical, and the pin hole 10 is between the outer peripheral surface of the minor diameter portion and the inner peripheral surface of the pin hole 10. A first air escape portion 16 is formed, which is a gap that allows the air in the cavity 4 to escape to the air escape groove 12.
The gap that forms the first air escape portion 16 is a minute gap through which the air passes but the molten resin does not pass, and the air in the cavity 4 is pushed out by the pressure of the molten resin injected into the cavity 4. It is supposed to be.
The other structure is the same as that of the first embodiment.
【００２０】なお、前記実施例においては、突き出しピ
ン本体の先端部をピン孔より小径または楕円にしたが、
この実施例に限定されず、多角形状でもよく、また、円
柱に軸方向に沿う溝を刻設してもよく、キャビティ内の
エアは通過するが、溶融樹脂は通過しない微小隙間が形
成されれはよい。In the above embodiment, the tip of the protruding pin body has a smaller diameter or an ellipse than the pin hole.
The present invention is not limited to this embodiment, and it may have a polygonal shape, or a groove may be formed in a cylinder along the axial direction so that a minute gap is formed in which air in the cavity passes but molten resin does not pass. Is good.
【００２１】[0021]
【発明の効果】以上説明したように、この発明によれ
ば、キャビティ内のエアは、ピン孔と突き出しピンの先
端部と間の隙間から逃げて外部に排出されると共に、金
型本体の離型時には相対的にキャビティの内部に突出し
て成形品を突き出すことができ、エア抜き機能と成形品
の突き出し機能を兼ね備えることができる。したがっ
て、別途エア抜き入れ子等を設ける必要もなく、キャビ
ティ内のエアを迅速に逃すことができ、構成の簡素化と
樹脂による目詰まりを防止できるという効果がある。As described above, according to the present invention, the air in the cavity escapes from the gap between the pin hole and the tip of the protruding pin and is discharged to the outside, and the mold body is separated. At the time of molding, the molded product can be relatively projected to the inside of the cavity and can have both the air bleeding function and the molded product protruding function. Therefore, it is not necessary to separately provide an air vent or the like, and the air in the cavity can be quickly released, which has the effects of simplifying the configuration and preventing clogging with resin.
【図１】この発明の第１の実施例の突き出しピンを示
し、(a) は側面図および端面図、(b) はピン孔に挿入し
た状態の突き出しピンを示す断面図。FIG. 1 is a side view and an end view of a protrusion pin according to a first embodiment of the present invention, and FIG. 1 (b) is a sectional view showing the protrusion pin inserted into a pin hole.
【図２】同実施例の成形用金型の縦断正面図。FIG. 2 is a vertical cross-sectional front view of the molding die of the embodiment.
【図３】この発明の第２の実施例を示す突き出しピンの
側面図および端面図。FIG. 3 is a side view and an end view of a protruding pin showing a second embodiment of the present invention.
１…金型本体、４…キャビティ、９…突き出しピン、１
０…ピン孔、１１…突き出しピン本体、１２…エア逃し
溝、１３，１６…第１のエア逃し部、１４…第２のエア
逃し部。1 ... Mold body, 4 ... Cavity, 9 ... Projection pin, 1
0 ... pin hole, 11 ... protruding pin body, 12 ... air escape groove, 13, 16 ... first air escape portion, 14 ... second air escape portion.
Claims (3)
突き出しピン本体を軸方向に進退自在に挿入し、この突
き出しピン本体の先端面を金型本体のキャビティに対向
し、離型時に成形品を突き出す突き出しピンにおいて、 前記突き出しピン本体の先端部近傍を前記ピン孔より小
径に形成し、前記キャビティ内のエアを金型本体の排気
通路に逃すエア逃し部を形成したことを特徴とする突き
出しピン。1. A mold main body is provided with a pin hole, and a protruding pin main body is inserted into this pin hole so as to be able to advance and retreat in the axial direction. In the ejection pin that sometimes ejects a molded product, the vicinity of the tip of the ejection pin body is formed to have a smaller diameter than the pin hole, and an air escape portion that escapes the air in the cavity to the exhaust passage of the mold body is formed. And the protruding pin.
突き出しピン本体を軸方向に進退自在に挿入し、この突
き出しピン本体の先端面を金型本体のキャビティに対向
し、離型時に成形品を突き出す突き出しピンにおいて、 前記突き出しピン本体の先端部近傍の外周面に環状のエ
ア逃し溝を設け、このエア逃し溝より先端側を前記ピン
孔より小径に形成し、前記キャビティ内のエアをエア逃
し溝に逃す隙間からなる第１のエア逃し部とし、前記エ
ア逃し溝より基端側にカット面を形成し、前記エア逃し
溝内のエアを金型本体の排気通路に逃す第２のエア逃し
部としたことを特徴とする突き出しピン。2. A mold main body is provided with a pin hole, and a protruding pin main body is inserted into this pin hole so as to be able to move forward and backward in the axial direction. At the time of ejecting a molded product, an annular air escape groove is provided on the outer peripheral surface near the tip of the ejector pin body, and the tip side of the air escape groove is formed to have a smaller diameter than the pin hole. A first air escape portion having a gap for escaping air to the air escape groove, a cut surface is formed on the base end side of the air escape groove, and the air in the air escape groove is released to the exhaust passage of the mold body. A protruding pin characterized by having 2 air escape parts.
突き出しピン本体を軸方向に進退自在に挿入し、この突
き出しピン本体の先端面を金型本体のキャビティに対向
し、離型時に成形品を突き出す突き出しピンにおいて、 前記突き出しピン本体の先端部近傍の外周面に環状のエ
ア逃し溝を設け、このエア逃し溝より先端側を真円のピ
ン孔に対して楕円とし、前記キャビティ内のエアをエア
逃し溝に逃す隙間からなる第１のエア逃し部とし、前記
エア逃し溝より基端側にカット面を形成し、前記エア逃
し溝内のエアを金型本体の排気通路に逃す第２のエア逃
し部としたことを特徴とする突き出しピン。3. A mold body is provided with a pin hole, and a protruding pin body is inserted into this pin hole so as to be able to advance and retreat in the axial direction. A tip end surface of this protruding pin body faces a cavity of the mold body, and a mold release is performed. At the time of ejecting a molded product, an annular air escape groove is provided on the outer peripheral surface near the tip of the ejector pin body, and the tip side of this air escape groove is an ellipse with respect to a pin hole of a perfect circle. The first air escape portion is formed by a gap that allows the air inside to escape to the air escape groove, and a cut surface is formed on the base end side of the air escape groove, and the air inside the air escape groove is used as the exhaust passage of the mold body. A protruding pin characterized by being used as a second air releasing portion to be released.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1279995A JPH08197592A (en) | 1995-01-30 | 1995-01-30 | Ejection pin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1279995A JPH08197592A (en) | 1995-01-30 | 1995-01-30 | Ejection pin |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08197592A true JPH08197592A (en) | 1996-08-06 |
Family
ID=11815447
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1279995A Pending JPH08197592A (en) | 1995-01-30 | 1995-01-30 | Ejection pin |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08197592A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002337196A (en) * | 2001-05-14 | 2002-11-27 | Hitachi Cable Ltd | Method for manufacturing three-dimensionally molded circuit substrate |
| JP2007098740A (en) * | 2005-10-04 | 2007-04-19 | Toyota Motor Corp | Resin shaping mold device |
| CN101954687A (en) * | 2010-06-19 | 2011-01-26 | 凡嘉科技（无锡）有限公司 | Translational inclined ejector structure |
| JP2011104794A (en) * | 2009-11-13 | 2011-06-02 | Hiroyuki Fukaya | Metallic mold for injection molding |
| CN102601940A (en) * | 2012-02-25 | 2012-07-25 | 宁波方正汽车模具有限公司 | Ball bearing type pulling hooking device for fixed mould roof |
| WO2014173671A3 (en) * | 2013-04-26 | 2015-01-08 | Bayerische Motoren Werke Aktiengesellschaft | Tool for producing a fiber/plastic composite component, comprising at least one ventilating bore and ejector pin arranged in the bore |
| CN106003484A (en) * | 2016-07-22 | 2016-10-12 | 深圳天珑无线科技有限公司 | Pouring die |
| JP2017024075A (en) * | 2015-07-24 | 2017-02-02 | 株式会社日伸電工 | Molding die device, vent pin and molding method |
| IT201600128107A1 (en) * | 2016-12-19 | 2018-06-19 | Futurplast S R L | Molding device for thermosetting materials. |
-
1995
- 1995-01-30 JP JP1279995A patent/JPH08197592A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002337196A (en) * | 2001-05-14 | 2002-11-27 | Hitachi Cable Ltd | Method for manufacturing three-dimensionally molded circuit substrate |
| JP2007098740A (en) * | 2005-10-04 | 2007-04-19 | Toyota Motor Corp | Resin shaping mold device |
| JP2011104794A (en) * | 2009-11-13 | 2011-06-02 | Hiroyuki Fukaya | Metallic mold for injection molding |
| CN101954687A (en) * | 2010-06-19 | 2011-01-26 | 凡嘉科技（无锡）有限公司 | Translational inclined ejector structure |
| CN102601940A (en) * | 2012-02-25 | 2012-07-25 | 宁波方正汽车模具有限公司 | Ball bearing type pulling hooking device for fixed mould roof |
| WO2014173671A3 (en) * | 2013-04-26 | 2015-01-08 | Bayerische Motoren Werke Aktiengesellschaft | Tool for producing a fiber/plastic composite component, comprising at least one ventilating bore and ejector pin arranged in the bore |
| JP2017024075A (en) * | 2015-07-24 | 2017-02-02 | 株式会社日伸電工 | Molding die device, vent pin and molding method |
| CN106003484A (en) * | 2016-07-22 | 2016-10-12 | 深圳天珑无线科技有限公司 | Pouring die |
| IT201600128107A1 (en) * | 2016-12-19 | 2018-06-19 | Futurplast S R L | Molding device for thermosetting materials. |
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