JPH0439015A - Injection-molded component and its mold - Google Patents
Injection-molded component and its moldInfo
- Publication number
- JPH0439015A JPH0439015A JP14701390A JP14701390A JPH0439015A JP H0439015 A JPH0439015 A JP H0439015A JP 14701390 A JP14701390 A JP 14701390A JP 14701390 A JP14701390 A JP 14701390A JP H0439015 A JPH0439015 A JP H0439015A
- Authority
- JP
- Japan
- Prior art keywords
- core pin
- mold
- ejector sleeve
- filling
- 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.)
- Granted
Links
- 239000012768 molten material Substances 0.000 claims abstract description 9
- 238000002347 injection Methods 0.000 claims description 4
- 239000007924 injection Substances 0.000 claims description 4
- 238000001746 injection moulding Methods 0.000 claims description 3
- 238000005452 bending Methods 0.000 abstract description 7
- 239000000463 material Substances 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 2
- 230000003287 optical effect Effects 0.000 description 4
- 238000000465 moulding Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
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
- B29C45/36—Moulds having means for locating or centering cores
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、細くて比較的長い貫通穴を有する円筒成形体
を成形する為の射出成形型に関するものであり、その成
形体は光通信等に適用される光コネクタの主要部材とし
てのフェルールに関するものである。Detailed Description of the Invention [Field of Industrial Application] The present invention relates to an injection mold for molding a cylindrical molded body having a thin and relatively long through hole, and the molded body is used for optical communication, etc. This invention relates to a ferrule as a main component of an optical connector applied to.
〔発明の概要１
本発明は、直径０．２ｍｍ以下の貫通穴を形成する為の
細径コアピンの一端をエジェクタスリーブでガイドし、
コアピンの他端を固定側のコアピンガイド穴に挿入して
、コアピンの両端を保持する構造になっている。また、
射出成形時の溶融材料の流入に同期してエジェクタスリ
ーブを後退させるので、樹脂圧によってコアピンが曲が
ることがない。[Summary of the Invention 1 The present invention provides a method for guiding one end of a small diameter core pin with an ejector sleeve to form a through hole with a diameter of 0.2 mm or less,
The structure is such that the other end of the core pin is inserted into the core pin guide hole on the fixed side to hold both ends of the core pin. Also,
Since the ejector sleeve is retracted in synchronization with the inflow of molten material during injection molding, the core pin will not bend due to resin pressure.
従来、このような細径を有する円筒体の成形は、第３図
に示すように、円筒体の軸方向と平行なパーティングラ
インで、金型を分割構成し、このパーティングライン面
で、細径コアピンを保持するような機構で成形していた
。Conventionally, in the molding of a cylindrical body having such a small diameter, as shown in FIG. It was molded with a mechanism that held a small diameter core pin.
［発明が解決しようとする課題］
従来の方法によると、円筒体の側面に軸方向に平行なパ
ーティングライン上にパリが生じ、後加工でパリを取る
必要があった。また、型開き操作とは別に、細径コアピ
ンを成形体から抜き取る操作が必要であり、そのため、
外部機構が複雑となり、極めて量産性が悪かった。更に
、外径と内径との軸ズレ等が生じ易い欠点があった。[Problems to be Solved by the Invention] According to the conventional method, a burr occurs on the parting line parallel to the axial direction on the side surface of the cylindrical body, and it is necessary to remove the burr in post-processing. In addition, apart from the mold opening operation, it is necessary to remove the small diameter core pin from the molded product.
The external mechanism was complicated and mass production was extremely difficult. Furthermore, there is a drawback that axis misalignment between the outer diameter and the inner diameter is likely to occur.
上記課題を解決する為に、本発明の金型は、円筒成形体
の端面にパーティングラインを設け、その軸方向が型開
き方向と平行になるキャビティ構造とした。更に、細径
コアピンの一端をエジェクタスリーブでガイドし、他端
を固定側のコアピンガイド穴でガイドすることによって
、細径コアピンの曲がり等が生じることなく、軸ズレの
少ないフェルールが得られる。In order to solve the above problems, the mold of the present invention has a cavity structure in which a parting line is provided on the end face of the cylindrical molded body, and the axial direction of the parting line is parallel to the mold opening direction. Furthermore, by guiding one end of the small diameter core pin with the ejector sleeve and guiding the other end with the core pin guide hole on the fixed side, a ferrule with less axial misalignment can be obtained without bending of the small diameter core pin.
［作用］
上記型構造によれば、細径コアピンの固定側への挿入時
には、変形及び座屈がなく確実に挿入され、溶融材料の
流入と同期したエジェクタスリーブの後退により、コア
ピンの曲がりや軸ズレの少ない円筒成形体が得られる、
〔実施例〕
以下に、本発明の実施例を図面に基づいて説明する１本
発明に係る円筒状の成形体とは、その中心に０．２ｍｍ
φ以下の細穴を備え、その円筒の肉厚は中心穴径以上で
、かつ円筒ｎ長さは中心穴径の１０倍以上と比較的長い
穴を備えた形状を規定するもので、具体例として光通信
等に適用される光コネクタのフェルールの製造に適する
ものである。[Function] According to the above mold structure, when the small diameter core pin is inserted into the fixed side, it is inserted reliably without deformation or buckling, and the retreat of the ejector sleeve in synchronization with the inflow of molten material prevents bending of the core pin and shaft. [Example] Examples of the present invention will be described below based on the drawings. A cylindrical molded body according to the present invention has a cylindrical molded body with a diameter of 0.2 mm at its center.
This specifies a shape that has a relatively long hole with a thin hole of φ or less, the wall thickness of the cylinder is greater than or equal to the diameter of the center hole, and the length n of the cylinder is 10 times or more the diameter of the center hole. It is suitable for manufacturing ferrules for optical connectors used in optical communications, etc.
〈実施例１〉 第１図は、本発明の実施例を示す金型の断面図である。<Example 1> FIG. 1 is a sectional view of a mold showing an embodiment of the present invention.
第１図ａは型開き及び突き出し状態、第１図すは型締め
状態、第１図Ｃは材料射出開始状態、第１図ｄは材料充
填完了時の断面を示す、型開き及び突き出し状態（第１
図ａ）では、エジェクタスリーブ２の先端面が、コアピ
ン３の先端面より寸法Ａだけ前に位置する。型締め開始
と共に、エジェクタスリーブ２の先端面が、固定側キャ
ビテイ面に当たり、エジェクタスリーブ２が徐々に下が
るのと同時に、エジェクタスリーブ先端面より出てきた
コアピン３が、固定側のコアピンガイド穴〇に挿入され
る。型締めが終了すると、第１図すの状態となる。そこ
に溶融材料がゲート７を通って流入すると、その圧力に
よって、エジェクタスリーブ２を前方に押していたバネ
体５が縮み、充填が開始される（第１図ｃ）６その際材
料はゲート７付近で充填された後、エジェクタスリーブ
２を押す方向に進むため、コアピン３には充填による曲
げ応力が加わらず、キャビティｌへの充填が完了する（
第１図ｄ）、その後成形体はスリーブ突き出しビン８に
よりキャビティｌがら押し出され第１図ａの状態に戻る
。このときコアピン３の先端は、エジェクタスリーブ２
の先端より内側にあるため曲りなどの損傷をうけること
はない。Figure 1a shows the mold opening and ejecting state, Figure 1 shows the mold closing state, Figure 1C shows the material injection starting state, and Figure 1d shows the cross section when the material filling is completed, the mold opening and ejecting state ( 1st
In Figure a), the distal end surface of the ejector sleeve 2 is located in front of the distal end surface of the core pin 3 by a distance A. As the mold clamping begins, the tip surface of the ejector sleeve 2 hits the stationary side cavity surface, and at the same time as the ejector sleeve 2 gradually lowers, the core pin 3 coming out from the ejector sleeve tip surface enters the fixed side core pin guide hole 〇. inserted. When the mold clamping is completed, the state shown in Figure 1 is reached. When the molten material enters there through the gate 7, the spring body 5 that was pushing the ejector sleeve 2 forward contracts due to the pressure, and filling starts (Fig. 1c) 6 At that time, the material flows near the gate 7. After filling, the core pin 3 moves in the direction of pushing the ejector sleeve 2, so no bending stress is applied to the core pin 3 due to filling, and the filling of the cavity l is completed (
1d), the molded body is then pushed out of the cavity 1 by the sleeve ejector pin 8 and returns to the state shown in FIG. 1a. At this time, the tip of the core pin 3 is connected to the ejector sleeve 2.
Because it is located inside the tip of the blade, it is not susceptible to damage such as bending.
〈実施例２〉
第２図は、本発明の他の実施例（実施例２）を示す金型
の断面図である。実施例１との遣いは、バネ体５の代わ
りにエアシリンダ９を用いた構造にある。型締めが終了
すると、第２図すの状態となる。そこに溶融材料がゲー
ト７を通って流入すると、その圧力によってエジェクタ
スリーブ２が押され、充填が開始される（第２図Ｃ）。<Example 2> FIG. 2 is a sectional view of a mold showing another example (Example 2) of the present invention. The difference from the first embodiment is that an air cylinder 9 is used instead of the spring body 5. When the mold clamping is completed, the state shown in Fig. 2 is reached. When the molten material enters there through the gate 7, its pressure pushes the ejector sleeve 2 and starts filling (FIG. 2C).
その際、エジェクタスリーブ２にはエアシリンダ９によ
り、後退を規制する力が働いているので、溶融材料の流
入圧力とバランス状態を保ちながら、エジェクタスリー
ブ２は後退する８本発明によれば、エジェクタスリーブ
２にかかる充填圧力に適した後退規制力を設定すること
が出来る。溶融材料はゲート７付近で充填された後、エ
ジェクタスリーブ２を押す方向に進むため、コアピン３
には充填による曲げ応力が加わらず、キャビティｌへの
充填が完了する（第２図ｄ）、その後成形体はスリーブ
突き出しビン８によりキャビティ１から押し出され第１
図ａの状態に戻る。このときコアピン３の先端は、エジ
ェクタスリーブ２の先端より内側にあるため曲りなどの
損傷をうけることはない。At this time, the air cylinder 9 exerts a force on the ejector sleeve 2 to restrict its retreat, so the ejector sleeve 2 retreats while maintaining a balance with the inflow pressure of the molten material.8According to the present invention, the ejector sleeve 2 It is possible to set a retreat regulating force suitable for the filling pressure applied to the sleeve 2. After the molten material is filled near the gate 7, it advances in the direction of pushing the ejector sleeve 2, so the core pin 3
No bending stress is applied to the cavity 1 due to filling, and the filling of the cavity 1 is completed (Fig. 2 d). After that, the molded body is pushed out from the cavity 1 by the sleeve ejector 8 and the first
Return to the state shown in Figure a. At this time, the tip of the core pin 3 is located inside the tip of the ejector sleeve 2, so it will not be bent or damaged.
また、エアシリンダ９の代わりに油圧シリンダを使用す
れば、より正確な制御が出来ることは容易に推測できる
。Furthermore, it can be easily assumed that if a hydraulic cylinder is used instead of the air cylinder 9, more accurate control can be achieved.
以上、本発明によれば、軸方向の表面にパーティングラ
インによるパリの発生がなく、しかも内径と外径の軸ズ
レが極めて少なく、大曲がりの少ない、直径０．２ｍｍ
以下の細径の貫通穴を持ったフェルールが、生産性よく
得られる。更に、本発明によれば、バネ体５によってエ
ジェクタスリーブ２の戻り力を規制できるので、成形不
良の一つであるジェツテイングを防止することもできる
。その結果、高い材料密度と高精度の転写性が得られた
０本発明の実施例による円筒成形体の寸法特性を表−１
に示す。As described above, according to the present invention, there is no occurrence of cracks due to parting lines on the surface in the axial direction, there is extremely little axial misalignment between the inner diameter and outer diameter, there is less large bending, and the diameter is 0.2 mm.
Ferrules with through holes of the following small diameters can be obtained with high productivity. Further, according to the present invention, since the return force of the ejector sleeve 2 can be regulated by the spring body 5, jetting, which is one of the molding defects, can be prevented. As a result, high material density and high-precision transferability were obtained.Table 1 shows the dimensional characteristics of the cylindrical molded body according to the embodiment of the present invention.
Shown below.
［表−１］[Table-1]
第１図は、本発明の実施例１を示す金型の断面図、第２
図は、本発明の実施例２を示す金型の断面図、第３図は
、従来の金型の断面図である。
キャビティ
エジェクタスリーブ
コアピン
コアピン保持ビン
バネ体
・固定側コアピンガイド穴
・ゲート
・スリーブ突き出しビン
・エアシリンダ
以上
出願人 セイコー電子工業株式会社
代理人 弁理士 林 敬 之 助従来の金型の断
面図
第３図
区FIG. 1 is a sectional view of a mold showing Example 1 of the present invention, and FIG.
The figure is a cross-sectional view of a mold showing Example 2 of the present invention, and FIG. 3 is a cross-sectional view of a conventional mold. Cavity Ejector Sleeve Core Pin Core Pin Holding Bin Spring Body, Fixed Side Core Pin Guide Hole, Gate, Sleeve Ejecting Bin, Air Cylinder Applicant Seiko Electronics Co., Ltd. Representative Patent Attorney Takayuki Hayashi Cross-sectional view of conventional mold Figure 3 Section
Claims (2)
出成形する金型において、その穴を形成する為のコアピ
ンをエジェクタスリーブで保持し、型開き時には、この
エジェクタスリーブの先端がコアピンの先端より前に位
置し、型締め時には、このエジェクタスリーブの後退と
共に、コアピンが固定側に設けられたコアピンガイド穴
に挿入され、射出成形時には、溶融材料の流入によりエ
ジェクタスリーブが後退することを特徴とする射出成形
金型。(1) In a mold for injection molding a cylindrical molded body having a hole with a diameter of 0.2 mm or less, the core pin for forming the hole is held by an ejector sleeve, and when the mold is opened, the tip of the ejector sleeve is attached to the core pin. Located in front of the tip, during mold clamping, the ejector sleeve retreats and the core pin is inserted into the core pin guide hole provided on the fixed side, and during injection molding, the ejector sleeve retreats due to the inflow of molten material. injection mold.
フェルール部材であることを特徴とする射出成形部品。(2) An injection molded part according to claim 1, wherein the cylindrical molded body is a ferrule member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14701390A JPH07110505B2 (en) | 1990-06-05 | 1990-06-05 | Injection molded parts and their molds |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14701390A JPH07110505B2 (en) | 1990-06-05 | 1990-06-05 | Injection molded parts and their molds |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0439015A true JPH0439015A (en) | 1992-02-10 |
| JPH07110505B2 JPH07110505B2 (en) | 1995-11-29 |
Family
ID=15420576
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14701390A Expired - Lifetime JPH07110505B2 (en) | 1990-06-05 | 1990-06-05 | Injection molded parts and their molds |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07110505B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010071939A1 (en) * | 2008-12-24 | 2010-07-01 | Ssb Technology Pty Ltd | Moulding cannulae and small deep holes |
| US20110097432A1 (en) * | 2009-10-23 | 2011-04-28 | Hon Hai Precision Industry Co., Ltd. | Injection mold |
-
1990
- 1990-06-05 JP JP14701390A patent/JPH07110505B2/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010071939A1 (en) * | 2008-12-24 | 2010-07-01 | Ssb Technology Pty Ltd | Moulding cannulae and small deep holes |
| CN102264524A (en) * | 2008-12-24 | 2011-11-30 | Ssb技术有限公司 | Moulding cannulae and small deep holes |
| JP2012513320A (en) * | 2008-12-24 | 2012-06-14 | エスエスビー テクノロジー プロプライエタリー リミテッド | Cannula and small deep hole forming |
| AU2009329828B2 (en) * | 2008-12-24 | 2013-07-18 | Ssb Technology Pty Ltd | Moulding cannulae and small deep holes |
| US20110097432A1 (en) * | 2009-10-23 | 2011-04-28 | Hon Hai Precision Industry Co., Ltd. | Injection mold |
| US8262380B2 (en) * | 2009-10-23 | 2012-09-11 | Hon Hai Precision Industry Co., Ltd. | Injection mold |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07110505B2 (en) | 1995-11-29 |
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