JPH03216310A - Injection nozzle - Google Patents
Injection nozzleInfo
- Publication number
- JPH03216310A JPH03216310A JP1201290A JP1201290A JPH03216310A JP H03216310 A JPH03216310 A JP H03216310A JP 1201290 A JP1201290 A JP 1201290A JP 1201290 A JP1201290 A JP 1201290A JP H03216310 A JPH03216310 A JP H03216310A
- Authority
- JP
- Japan
- Prior art keywords
- nozzle body
- inner cylinder
- hole
- diameter
- top 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.)
- Granted
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
- B29C45/20—Injection nozzles
- B29C45/23—Feed stopping equipment
- B29C45/231—Needle valve systems 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
- B29C45/20—Injection nozzles
-
- 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
- B29C45/27—Sprue channels ; Runner channels or runner nozzles
- B29C45/28—Closure devices therefor
- B29C45/2806—Closure devices therefor consisting of needle valve systems
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of 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、射出成形機等のたとえば樹脂を射出するノズ
ルであって、樹脂を射出する射出口の開閉か可能な射出
ノズルに関するものである。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a nozzle for injecting resin, such as an injection molding machine, which can open and close an injection port for injecting the resin. .
［従来の技術］
従来、この種の射出ノズルとしては、第３図に示すよう
に、流路１ａの先端側（図において下側）が漸次縮径さ
れる縮径部１ｂを経て小径の射出口Ｉｃとなっているノ
ズル本体ｌと、このノズル本体ｌの流路１ａ内に軸方向
に移動自在に挿入され、その先端で前記射出口１ｃを開
閉するニードル弁２と、流路１ａ内でニードル弁２を軸
方向に移動自在に支持する羽根リング３とを備えたもの
が知られている。[Prior Art] Conventionally, as shown in FIG. 3, in this type of injection nozzle, the tip side (lower side in the figure) of a flow path 1a passes through a diameter-reducing portion 1b whose diameter is gradually reduced, and a small-diameter injection is produced. A nozzle body 1 serving as an outlet Ic, a needle valve 2 which is inserted movably in the axial direction into the flow path 1a of the nozzle body 1 and whose tip opens and closes the injection port 1c, One is known that includes a vane ring 3 that supports the needle valve 2 so as to be movable in the axial direction.
上記のように構成された射出ノズルにおいては、ノズル
本体ｌの縮径部１ｂを加工する場合、流路ｌａの基端側
（第３図において上側）から切削工具や研削砥石を挿入
してテーパ状に加工している。In the injection nozzle configured as described above, when processing the reduced diameter portion 1b of the nozzle body l, a cutting tool or a grinding wheel is inserted from the proximal end side (upper side in Fig. 3) of the flow path la to form the taper. It is processed into a shape.
［発明が解決しようとする課題］
このため、縮径部１ｂの加工が困難で、特に長いノズル
の場合には、縮径部１ｂの加工ができないという問題が
あった。[Problems to be Solved by the Invention] Therefore, it is difficult to process the reduced diameter portion 1b, and particularly in the case of a long nozzle, there is a problem in that the reduced diameter portion 1b cannot be processed.
本発明は、上記事情に鑑みてなされたものであり、縮径
部を簡単に加工することのできる射出ノズルを提供する
ことを目的としている。The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an injection nozzle whose diameter-reduced portion can be easily processed.
［課題を解決するための手段］
本発明は、上記目的を達成するため、流路の先端が漸次
縮径される縮径部を経て小径の射出口となっているノズ
ル本体と、このノズル本体の流路内に軸方向に移動自在
に挿入され前記射出口を開閉するニードル弁とを備えた
射出ノズルにおいて、前記縮径部および射出口の部分は
、ノズル本体の先端側から挿入されて焼きばめされた内
筒によって形成され、この内筒とノズル本体との嵌合面
は該ノズル本体の先端方向に向けて縮径されるテーパ面
で形成されているものである。[Means for Solving the Problems] In order to achieve the above object, the present invention provides a nozzle body in which the tip of a flow path becomes a small-diameter injection port through a diameter-reducing portion where the diameter is gradually reduced, and this nozzle body. In the injection nozzle, the needle valve is inserted movably in the axial direction into a flow path and opens and closes the injection port. The nozzle body is formed by a fitted inner cylinder, and the fitting surface between the inner cylinder and the nozzle body is formed by a tapered surface whose diameter decreases toward the distal end of the nozzle body.
［作用 ］
本発明においては、ノズル本体に形成されるテーパ面を
、該ノズル本体の先端から切削工具および研削工具を挿
入することにより加工する。そして、ノズル本体を加熱
して、該ノズル本体のテーパ面の径が十分大きくなった
ら、該テーパ面内に、縮径部および射出口が形成された
内筒を挿入する。[Operation] In the present invention, the tapered surface formed on the nozzle body is processed by inserting a cutting tool and a grinding tool from the tip of the nozzle body. Then, when the nozzle body is heated and the diameter of the tapered surface of the nozzle body becomes sufficiently large, an inner cylinder in which a diameter-reduced portion and an injection port are formed is inserted into the tapered surface.
これにより内筒がノズル本体に焼きばめされた状態にな
る。この際、テーパ面が先端方向に縮径されているので
、ノズル本体に内筒が強固に固定される。This brings the inner cylinder into a state where it is shrink-fitted to the nozzle body. At this time, since the diameter of the tapered surface is reduced in the distal direction, the inner cylinder is firmly fixed to the nozzle body.
しかも、内筒が単体の時に縮径部を加工することができ
るので、どんなに長いノズルであっても、該縮径部を簡
単に加工することができる。Furthermore, since the reduced diameter portion can be machined when the inner cylinder is a single unit, the reduced diameter portion can be easily machined no matter how long the nozzle is.
［実施例コ
以下、第１図ないし第２図を参照して本発明の一実施例
を説明する。[Embodiment 1] An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.
第１図において、１１は、たとえばＳＵＳ系鋼材等の材
料で円筒状に形成されたノズル本体であり、このノズル
本体１１の内面が樹脂の流路Ｉ１ａとなっている。この
流路１１ａの先端側には、該流路１１ａより大径で、該
流路１１ａに同軸の平行穴１ｌｂが形成され、この平行
穴１ｌｂの先端側には、該平行穴１ｌｂと同軸のテーパ
穴（テーパ面）１１ｃか形成されている。テーパ穴１１
ｃは、この実施例においては、平行穴１ｌｂにつながる
位置の基端縁の径ＤＩが１０ｍｍに形成され、先端縁の
径Ｄ２が９．９８ｍｍに形成されてる。In FIG. 1, 11 is a nozzle body formed in a cylindrical shape from a material such as SUS steel, and the inner surface of this nozzle body 11 serves as a resin flow path I1a. A parallel hole 1lb, which has a larger diameter than the flow path 11a and is coaxial with the flow path 11a, is formed on the tip side of the flow path 11a. A tapered hole (tapered surface) 11c is formed. Tapered hole 11
In this embodiment, c has a diameter DI of 10 mm at the proximal edge at a position connected to the parallel hole 1lb, and a diameter D2 of 9.98 mm at the distal edge.
また、上記平行穴１ｌｂには、羽根リングＩ２が設けら
れている。この羽根リングｌ２は、第２図に示すように
、リング１２ａから放射状に複数（この実施例では４つ
）の羽根１２ｂが等間隔に形成されたものであり、羽根
１２ｂの先端面で平行穴１ｌｂに精密に嵌合され、これ
によって、リングｌ２ａの軸心が該平行穴１ｌｂの軸心
に精密に一致されている。そして、リング１２ａの軸心
の孔が後述するニードル弁１４の案内孔１２ｃとなって
いる。この羽根リングｌ２は、テーパ穴１１ｃに先端か
ら挿入された内筒工３によって流路１１ａと平行穴１ｌ
ｂの境の段部に押し付けられた状態で該平行穴１ｌｂ内
に固定されている。Further, a blade ring I2 is provided in the parallel hole 1lb. As shown in FIG. 2, this vane ring l2 has a plurality of (four in this embodiment) vanes 12b formed at equal intervals radially from a ring 12a, and parallel holes are formed at the tip surfaces of the vanes 12b. 1 lb, so that the axial center of the ring 12a is precisely aligned with the axial center of the parallel hole 1 lb. A hole at the axis of the ring 12a serves as a guide hole 12c for a needle valve 14, which will be described later. This vane ring l2 is connected to the flow path 11a and the parallel hole 1l by an inner cylinder 3 inserted from the tip into the tapered hole 11c.
It is fixed in the parallel hole 1lb in a state where it is pressed against the stepped portion at the border of b.
内筒１３は、ＳＵＳ系鋼材等の材料で筒状に形成され、
その基端部の外周に平行穴１ｌｂに嵌合する平行部１３
ａが形成され、この平行部１３ａの先端側に前記テーパ
穴１１ｃに嵌合するテーパ部（テーパ面）＋３ｂが形成
されたものである。また、この内筒ｌ３には、その基端
部の内面に流路１１ａと同径の流路用平行穴１３ｃが形
成され、この流路用平行穴１３ｃの先端側にテーパ状に
漸次縮径する縮径部１３ｄが形成され、この縮径部１３
ｄの先端側が樹脂を射出する小径の射出口１３ｅとなっ
ている。また、上記平行部１３ａにつながるテーパ部１
３ｂの基端縁の径ｄｉは、１０ｍｍに形成され、テーパ
部１３ｂの先端縁の径ｄ２が９．９８＋ｎ＋ｎに形成さ
れている。そして、この内筒ｌ３は、該内筒ｌ３を−９
０゜Ｃ〜−１００℃に冷却し、前記ノズル本体ＩＩを１
２０゜Ｃ−１５０℃）に加熱した状態で、テーパ穴１１
ｃ内に平行部１３ａ側から挿入されて焼きばめによって
固定される。The inner cylinder 13 is formed into a cylindrical shape from a material such as SUS steel,
A parallel portion 13 that fits into a parallel hole 1lb on the outer periphery of its base end.
a is formed, and a tapered portion (tapered surface) +3b that fits into the tapered hole 11c is formed on the distal end side of this parallel portion 13a. In addition, a parallel hole 13c for a flow path having the same diameter as the flow path 11a is formed on the inner surface of the base end portion of the inner cylinder l3, and the diameter of the parallel hole 13c for a flow path is gradually reduced toward the distal end side. A reduced diameter portion 13d is formed, and this reduced diameter portion 13
The tip side of d is a small-diameter injection port 13e for injecting resin. Further, the tapered portion 1 connected to the parallel portion 13a is
The diameter di of the proximal edge of the tapered portion 13b is 10 mm, and the diameter d2 of the distal edge of the tapered portion 13b is 9.98+n+n. And, this inner cylinder l3 is -9
Cool the nozzle body II to 0°C to -100°C.
20°C - 150°C), taper hole 11
c from the parallel portion 13a side and fixed by shrink fitting.
そして、テーパ穴１１ｃの基端縁の径ＤＩと先端縁の径
Ｄ２とは、次の式（１）の関係になるように設定するこ
とが好ましい。It is preferable that the diameter DI of the proximal edge and the diameter D2 of the distal edge of the tapered hole 11c are set to have the relationship expressed by the following equation (1).
０．０１５≦（Ｄ Ｉ −Ｄ ２）／Ｄ Ｉ≦０．０３
・・・・（１）
これは、（ＤＩ−Ｄ２）／ＤＩが０．０１５より小さい
と、内筒ｌ３の抜け止めの効果が少なくなり、（Ｄ Ｉ
−Ｄ ２）／Ｄ Ｉが０．０３より大きくなると、焼
きばめ時、内筒ｌ３がテーパ穴１１ｃ内に入りにくくな
るからである。0.015≦(DI−D2)/DI≦0.03
...(1) This means that if (DI-D2)/DI is smaller than 0.015, the effect of preventing the inner cylinder l3 from coming off will be reduced, and (DI
This is because if -D2)/DI is larger than 0.03, it becomes difficult for the inner cylinder l3 to enter the tapered hole 11c during shrink fitting.
また、第１図において、ｌ４は、羽根リング１２の案内
孔１２ｃに案内されて、流路１１ａの軸方向に移動可能
にされ、先端部で射出口１３ｅを開閉するニードル弁で
ある。Further, in FIG. 1, 14 is a needle valve that is guided by the guide hole 12c of the vane ring 12, is movable in the axial direction of the flow path 11a, and opens and closes the injection port 13e at its tip.
上記のように構成された射出ノズルにおいては、ノズル
本体１１のテーパ穴１１ｃを、該ノズル本体ＩＩの先端
から切削工具および研削工具を挿入してテーパ状に加工
する。また、ノズル本体ＩＩに内筒１３を固定するには
、まずノズル本体ｌ１を加熱し、内筒ｌ３を冷却してお
く。そして、加熱されたノズル本体１ｌに、まず、その
先端側からテーパ穴１１ｃを通して平行穴＋ｔｂに羽根
リングＩ２を挿入し、次いで冷却された内筒ｌ３を該テ
ーパ穴１１ｃにその先端側から挿入する。これにより、
内筒ｌ３がノズル本体１ｌに焼きばめおよび冷やしばめ
された状態に固定される。この際、テーパ穴Ｉ１ｃおよ
びテーパ部１３ｂか先端方向に縮径されているので、内
筒ｌ３が先端に抜ける方向に対して強固に固定されるこ
とになる。このため、流路１１ａ内に高圧の樹脂が供給
されても、内筒ｌ３がノズル本体ｌ１から抜けることが
ない。In the injection nozzle configured as described above, the tapered hole 11c of the nozzle body 11 is machined into a tapered shape by inserting a cutting tool and a grinding tool from the tip of the nozzle body II. Further, in order to fix the inner cylinder 13 to the nozzle body II, first the nozzle body l1 is heated and the inner cylinder l3 is cooled. Then, the vane ring I2 is first inserted into the parallel hole +tb through the tapered hole 11c from the tip side of the heated nozzle body 1l, and then the cooled inner cylinder l3 is inserted into the tapered hole 11c from the tip side. . This results in
The inner cylinder l3 is fixed to the nozzle body 1l in a shrink-fitted and cold-fitted state. At this time, since the diameter of the tapered hole I1c and the tapered portion 13b is reduced in the distal direction, the inner cylinder l3 is firmly fixed in the direction in which it exits toward the distal end. Therefore, even if high-pressure resin is supplied into the flow path 11a, the inner cylinder l3 will not come off from the nozzle body l1.
また、内筒ｌ３については、該内筒ｌ３が単体の時に縮
径部１３ｄや射出口１３ｅの加工を行う。Further, regarding the inner cylinder l3, when the inner cylinder l3 is a single unit, the reduced diameter portion 13d and the injection port 13e are processed.
したがって、上記射出ノズルにおいては、簡単に縮径部
１３ｄの加工を行うことができるから、どんなに長いノ
ズルであっても、簡単に製造することができる。Therefore, in the injection nozzle, the reduced diameter portion 13d can be easily processed, so no matter how long the nozzle is, it can be manufactured easily.
「発明の効果」
以上説明したように、本発明によれば、流路の先端が漸
次縮径される縮径郎を経て小径の射出口となっているノ
ズル本体と、このノズル本体の流路内に軸方向に移動自
在に挿入され前記射出口を開閉するニードル弁とを備え
た射出ノズルにおいて、前記縮径部および射出口の部分
は、ノズル本体の先端側から挿入されて焼きばめされた
内筒によって形成され、この内筒とノズル本体との嵌合
面は該ノズル本体の先端方向に向けて縮径されるテーパ
面で形成されているから、ノズル本体を加熱後、縮径部
および射出口が形成された内筒を挿入することにより内
筒をノズル本体に焼きばめにより固定することができ、
前記テーパ面によって内筒をノズル本体に強固に固定す
ることができる。"Effects of the Invention" As explained above, according to the present invention, there is provided a nozzle main body in which the tip of the flow path becomes a small-diameter injection port through a diameter reduction tube whose diameter is gradually reduced, and a flow path in this nozzle main body. In the injection nozzle, the needle valve is inserted movably in the axial direction to open and close the injection port, and the reduced diameter portion and the injection port are inserted from the tip side of the nozzle body and shrink-fitted. The fitting surface between the inner cylinder and the nozzle body is formed by a tapered surface whose diameter decreases toward the tip of the nozzle body. By inserting the inner cylinder in which the injection port is formed, the inner cylinder can be fixed to the nozzle body by shrink fitting,
The tapered surface allows the inner cylinder to be firmly fixed to the nozzle body.
そして、内筒については、該内筒が単体の時に縮径部を
加工することができるから、どんなに長いノズルであっ
ても、簡単に製造することができるという顕著な作用効
果を奏する。As for the inner cylinder, since the reduced diameter part can be machined when the inner cylinder is a single unit, no matter how long the nozzle is, there is a remarkable effect that it can be manufactured easily.
第１図ないし第２図は本発明の一実施例を示す図であっ
て、第１図は射出ノズルの断面図、第２図は羽根リング
の平面図、第３図は従来例として示した射出ノズルの断
面図である。
１Ｉ・・・ノズル本体、Ｉｌａ・・・・・・流路、１１
ｃ・・・・・テーパ穴（テーパ面）、Ｉ３・・・・・内
筒、１３ｂ・ テーパ部（テーパ穴）、１３ｄ・・・・
・縮径部、１３ｅ・・ 射出口、１４−・・・ニードル
弁。Figures 1 and 2 are diagrams showing an embodiment of the present invention, in which Figure 1 is a sectional view of an injection nozzle, Figure 2 is a plan view of a vane ring, and Figure 3 is a conventional example. It is a sectional view of an injection nozzle. 1I... Nozzle body, Ila... Channel, 11
c...Tapered hole (tapered surface), I3...Inner cylinder, 13b/Tapered part (tapered hole), 13d...
- Reduced diameter part, 13e... Injection port, 14-... Needle valve.
Claims (1)
となっているノズル本体と、このノズル本体の流路内に
軸方向に移動自在に挿入され前記射出口を開閉するニー
ドル弁とを備えた射出ノズルにおいて、前記縮径部およ
び射出口の部分は、ノズル本体の先端側から挿入されて
焼きばめされた内筒によって形成され、この内筒とノズ
ル本体との嵌合面は該ノズル本体の先端方向に向けて縮
径されるテーパ面で形成されていることを特徴とする射
出ノズル。A nozzle body whose tip of a flow path becomes a small-diameter injection port through a diameter-reducing part whose diameter is gradually reduced, and a needle that is inserted into the flow path of the nozzle body so as to be movable in the axial direction and opens and closes the injection port. In the injection nozzle equipped with a valve, the reduced diameter portion and the injection port portion are formed by an inner cylinder that is inserted from the tip side of the nozzle body and shrink-fitted, and the fitting between the inner cylinder and the nozzle body is An injection nozzle characterized in that the surface is formed as a tapered surface whose diameter decreases toward the tip of the nozzle body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012012A JP2861177B2 (en) | 1990-01-22 | 1990-01-22 | Injection nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012012A JP2861177B2 (en) | 1990-01-22 | 1990-01-22 | Injection nozzle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03216310A true JPH03216310A (en) | 1991-09-24 |
| JP2861177B2 JP2861177B2 (en) | 1999-02-24 |
Family
ID=11793680
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2012012A Expired - Fee Related JP2861177B2 (en) | 1990-01-22 | 1990-01-22 | Injection nozzle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2861177B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100653533B1 (en) * | 2005-07-21 | 2006-12-05 | 주식회사 포스코 | Tundish immersion nozzle centering guide and tundish immersion nozzle movement |
| JP2022149074A (en) * | 2021-03-25 | 2022-10-06 | 株式会社日本製鋼所 | Shut-off nozzle with needle valve, injection unit, and injection molding machine |
-
1990
- 1990-01-22 JP JP2012012A patent/JP2861177B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100653533B1 (en) * | 2005-07-21 | 2006-12-05 | 주식회사 포스코 | Tundish immersion nozzle centering guide and tundish immersion nozzle movement |
| JP2022149074A (en) * | 2021-03-25 | 2022-10-06 | 株式会社日本製鋼所 | Shut-off nozzle with needle valve, injection unit, and injection molding machine |
| AT524876A3 (en) * | 2021-03-25 | 2024-12-15 | Japan Steel Works Ltd | Shut-off nozzle with needle valve, injection device and injection molding machine |
| AT524876B1 (en) * | 2021-03-25 | 2025-02-15 | Japan Steel Works Ltd | Shut-off nozzle with needle valve, injection device and injection molding machine |
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| Publication number | Publication date |
|---|---|
| JP2861177B2 (en) | 1999-02-24 |
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