JPH02143821A - Twin injection molder having t-nozzle - Google Patents

Twin injection molder having t-nozzle

Info

Publication number
JPH02143821A
JPH02143821A JP63295984A JP29598488A JPH02143821A JP H02143821 A JPH02143821 A JP H02143821A JP 63295984 A JP63295984 A JP 63295984A JP 29598488 A JP29598488 A JP 29598488A JP H02143821 A JPH02143821 A JP H02143821A
Authority
JP
Japan
Prior art keywords
torpedo
shaped nozzle
valve housing
nozzle body
nozzle
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
Application number
JP63295984A
Other languages
Japanese (ja)
Other versions
JPH0478451B2 (en
Inventor
Mitsuaki Yamachika
光昭 山近
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Japan Steel Works Ltd
Original Assignee
Japan Steel Works Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Japan Steel Works Ltd filed Critical Japan Steel Works Ltd
Priority to JP63295984A priority Critical patent/JPH02143821A/en
Publication of JPH02143821A publication Critical patent/JPH02143821A/en
Publication of JPH0478451B2 publication Critical patent/JPH0478451B2/ja
Granted legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/16Making multilayered or multicoloured articles
    • B29C45/1603Multi-way nozzles specially adapted therefor

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

PURPOSE:To make various moldings possible and prevent threading from developing at every shot by a structure wherein a T-nozzle main body, to the frontward end of which an annular outside torpedo is fitted and to the backward end part of which a valve housing is connected, is connected through shut-off mechanisms to a first and a second injection units so as to insert a reciprocatingly moving shaft in the valve housing and to fix an inside torpedo to the inner peripheral surface of the outside torpedo, at the boss part of which a forward end sealing part and a backward end sealing part are provided. CONSTITUTION:A T-nozzle main body 5 is connected respectively through shut-off mechanisms 3 and 4 to a first and a second injection units 1 and 2. And, to the frontward end of and in the T-nozzle main body 5, an annular outside torpedo 7 is fitted and, to the backward end of the body 5, a cylindrical valve housing 11 is connected. Further, a resiprocatingly moving shaft 9 is inserted in the valve housing 11 and an inside torpedo, which is slidably guided by the inner peripheral surface of the outside torpedo 7, is fixed to the tip part of the shaft. Furthermore, a forward end sealing face 8b and a backward end sealing part 8c are provided at the boss part 8a of the inside torpedo 8 and gas feed ports 14 and 15 are respectively provided at the two connecting parts 16 and 17 of the T-nozzle main body 5.

Description

【発明の詳細な説明】 [産業上の利用分野] 本発明は、−台の二軸射出成形機によって、サンドウィ
ッチ成形、中空成形9発泡成形およびシングル成形が可
能なT形ノズルを有する二軸射出成形機に関する。
Detailed Description of the Invention [Industrial Application Field] The present invention is a two-screw injection molding machine with a T-shaped nozzle that can perform sandwich molding, blow molding, foam molding, and single molding using a two-screw injection molding machine. Regarding molding machines.

[従来の技術] 従来、二軸射出成形機の二台の射出ユニットに結合され
るT形ノズルとしては、下記(イ)および(ロ)のもの
等が知られている。
[Prior Art] Conventionally, as T-shaped nozzles coupled to two injection units of a two-screw injection molding machine, the following (a) and (b) are known.

(イ)外側ノズル内に同心的に配設したその軸方向に摺
動自在な内側ノズルを回動手段により回動自在とし、該
内側ノズルの回動により樹脂通路を開閉するとともに、
該内側ノズル内に前記内側ノズルのノズル孔を開閉する
作動ロッドを設けたもの(特開昭59−220341号
公報)。
(a) The inner nozzle, which is arranged concentrically within the outer nozzle and is slidable in its axial direction, is made rotatable by a rotating means, and the resin passage is opened and closed by the rotation of the inner nozzle, and
An actuating rod for opening and closing a nozzle hole of the inner nozzle is provided in the inner nozzle (Japanese Patent Laid-Open No. 59-220341).

(ロ)射出ヘッド内に同心状に配設した環状インサート
を軸方向に摺動自在に設けるとともに、該環状インサー
ト内に接続通路を有するニードルを回転自在に設け、該
ニードルを回転させることによって前記接続通路を開閉
して、ガスを供給できるように構成したもの(特開昭6
3−94805号公報参照)。
(b) An annular insert arranged concentrically within the injection head is provided so as to be slidable in the axial direction, and a needle having a connection passage is provided within the annular insert so as to be freely rotatable, and by rotating the needle, A structure configured to supply gas by opening and closing the connection passage (Japanese Patent Application Laid-open No. 6
(See Publication No. 3-94805).

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

上記従来の技術は、いずれもノズル孔の開閉機構が複雑
で、かつ複数の駆動装置が設けられているため、ノズル
孔の開閉の制御も複雑となる。さらにサンドウィッチ成
形用に開発されたものであって、−軸のみによるシング
ル成形が不可能である上、外側ノズルのノズル孔の開閉
を内側シリンダ(または環状インサート)を摺動させて
行なうため、ショット毎にノズル孔よりの溶融樹脂の糸
引きを起こすとともに、T形ノズルの径をあまり小径と
することは強度的にみて困難であるという問題点があっ
た。
In all of the above conventional techniques, the nozzle hole opening/closing mechanism is complicated and a plurality of drive devices are provided, so that the control of opening/closing the nozzle hole is also complicated. Furthermore, since it was developed for sandwich molding, it is impossible to perform single molding using only the -axis, and since the nozzle hole of the outer nozzle is opened and closed by sliding the inner cylinder (or annular insert), the shot Each time, the molten resin becomes stringy from the nozzle hole, and it is difficult to make the diameter of the T-shaped nozzle too small from the viewpoint of strength.

本発明は、上記従来の技術の有する問題点に鑑みてなさ
れたものであって、−台の成形機でサントウィッチ成形
、中空成形1発泡成形およびシングル成形が可能で、か
つショット毎の糸引きを防止できる前半な4jt造のT
形ノズルを有する二軸射出成形機を提供することを目的
とするものである。
The present invention has been made in view of the above-mentioned problems of the conventional technology, and is capable of performing sandwich molding, blow molding, one-foam molding, and single molding with one molding machine, and has the ability to draw strings for each shot. The first half of the 4jt construction can prevent
The object of the present invention is to provide a twin-screw injection molding machine having a shaped nozzle.

〔課題を解決するための手段] 上記目的を達成するため、本発明の二輔射出成ノ[月幾
は、第1射出ユニットおよび第2射出ユニットにそれぞ
れシャットオフ機構を介してT形ノズル本体を接続し、
該Tff5ノズル本体内の先端部位に工業状の外側トー
ピードを嵌着するとともに、その後端部に前記T形ノズ
ル本体内に配設された円筒状のバルブハウジングを接続
して、T形ノズルの内周面とバルブハウジングの外周面
との間に外側通路を形成し、前記バルブハウジング内に
往復駆動手段により往復動されるシャフトを挿入して両
者間に内11111通路を形成させ、前記外側トーピー
ドの内周面に摺動自在に案内される内側トーピードを前
記シャフト先端部に固着し、該内側トビートのボス部に
先端シール面および後端シール部を設け、さらに、前記
T形ノズル本体の二つの接続部にそれぞれガス供給口を
設けた。
[Means for Solving the Problems] In order to achieve the above object, the present invention provides a T-shaped nozzle body through a shut-off mechanism in the first injection unit and the second injection unit, respectively. connect,
An industrial-type outer torpedo is fitted to the tip of the Tff5 nozzle body, and a cylindrical valve housing disposed inside the T-shaped nozzle body is connected to the rear end of the Tff5 nozzle. An outer passage is formed between the circumferential surface and the outer circumferential surface of the valve housing, a shaft reciprocated by a reciprocating drive means is inserted into the valve housing to form an inner passage between the two, and the outer torpedo is An inner torpedo slidably guided on the inner circumferential surface is fixed to the tip of the shaft, a boss portion of the inner torpedo is provided with a tip sealing surface and a rear end sealing portion, and the two of the T-shaped nozzle bodies A gas supply port was provided at each connection.

また、T形ノズル本体を複数の部分に分解可能に構成す
ると効果的である。
Furthermore, it is effective to configure the T-shaped nozzle body so that it can be disassembled into a plurality of parts.

〔作用1 本発明のT形ノズルを有する二軸射出成形機により成形
する際に、まず往復駆動装置を作動させてシャフトを介
して内側トーピードを所定の中間位置に移動し、外側通
路および内側通路をともに開放状態としてノズル孔に連
通させる。ついで両射出ユニットより溶融合成樹脂を外
側通路および内側通路にそれぞれ圧入することにより金
型内に射出してサンドウィッチ成形を行なう。この場合
、内側トーピードの位置を制御することにより、外側通
路および内側通路からノズル孔へ流出する溶融合成樹脂
の流量を制御して安定したスキン層を形成することがで
きる。
[Operation 1] When molding is performed using the two-shaft injection molding machine having the T-shaped nozzle of the present invention, the reciprocating drive device is first operated to move the inner torpedo to a predetermined intermediate position via the shaft, and the outer passage and the inner passage are Both are opened and communicated with the nozzle hole. Then, the molten synthetic resin is injected into the mold by press-fitting the resin into the outer passage and the inner passage from both injection units to perform sandwich molding. In this case, by controlling the position of the inner torpedo, a stable skin layer can be formed by controlling the flow rate of the molten synthetic resin flowing out from the outer passage and the inner passage to the nozzle hole.

また、往復駆動装置により、内側トーピードを最後退位
置に後退させ、内側トーピードの後端シール部により内
側通路を閉鎖した状態で、第1射出ユニットより溶融合
成樹脂を外側通路内に圧入することにより金型内に射出
してシングル成形を行なう。
In addition, the inner torpedo is retracted to the most retracted position by the reciprocating drive device, and with the inner passage closed by the rear end seal portion of the inner torpedo, the molten synthetic resin is press-fitted into the outer passage from the first injection unit. Single molding is performed by injecting into a mold.

さらに、往復駆動装置を作動させることにより、シャフ
トを介して内側トーピードを所定の中間位置に移動させ
、外側通路および内側通路をともに開放状態としてノズ
ル孔に連通させ、第1射出ユニットまたは第2射出ユニ
ットのいずれか一方をそのシャットオ)機構により閉鎖
する。そして、開放されている一方の射出ユニットより
溶融合成樹脂を金型内に射出し、他方のシャットオフ機
(?4により閉鎖された射出ユニット側のガス供給口よ
りガスを圧入することにより中空成形または発泡成形を
行なう。
Furthermore, by operating the reciprocating drive device, the inner torpedo is moved to a predetermined intermediate position via the shaft, the outer passage and the inner passage are both opened and communicated with the nozzle hole, and the first injection unit or the second injection Either one of the units is closed by its shut-off mechanism. Then, the molten synthetic resin is injected into the mold from one injection unit that is open, and the gas is injected from the gas supply port on the injection unit side, which is closed by the other shut-off machine (?4). Or perform foam molding.

〔実施例] 本発明の実施例を図面に基づいて説明する。〔Example] Embodiments of the present invention will be described based on the drawings.

第1図および第2図に示すように、第1射出ユニット1
および第2射出ユニット2は、図示しない移動台に並設
されており、これら両射比ユニット1.2の各ヘッドl
a、 2bには、シャットオフバルブ3.4等のシャッ
トオフ機構がそれぞれ設けられている。一方、T形ノズ
ル本体5は、両側に突設された接続部16.17を有す
る基部5aと該基部5aに図示しないボルト等により分
解可能に結合された先端部5bから構成されており、該
先端部5bの前方開口部にはノズル孔6aを有するノズ
ルチップ6が着脱自在に固着されている。そして、一方
の接続部16のフランジ部材16aを第1射出ユニ・ソ
トlのヘッド1aのフランジ部材1bに結合し、他方の
接続部17のフランジ部材17aを第2射出ユニット2
のヘッド2aのフランジ部材2bに結合する。
As shown in FIGS. 1 and 2, the first injection unit 1
and the second injection unit 2 are arranged in parallel on a moving table (not shown), and each head l of these two injection ratio units 1.2
A and 2b are each provided with a shutoff mechanism such as a shutoff valve 3.4. On the other hand, the T-shaped nozzle main body 5 is composed of a base part 5a having connecting parts 16 and 17 protruding from both sides, and a distal end part 5b which is removably connected to the base part 5a with bolts or the like (not shown). A nozzle tip 6 having a nozzle hole 6a is removably fixed to the front opening of the tip 5b. Then, the flange member 16a of one connecting part 16 is connected to the flange member 1b of the head 1a of the first injection unit 1, and the flange member 17a of the other connecting part 17 is connected to the second injection unit 2.
It is coupled to the flange member 2b of the head 2a.

また、T形ノズル本体5内の先端部位には、環状の外側
トーピード7が嵌着されており、その後端部にT形ノズ
ル本体5内に同心状に配設された円筒状のバルブハウジ
ング11を接続して、T形ノズル本体5の内周面とバル
ブハウジング11の外周面との間に外側通路12が形成
されている。さらに、前記バルブハウジングll内には
、その後端面等に取付けられた油圧シリンダl口および
その内部に設けられたピストンlOa等からなる往復駆
動手段により往復動されるシャフト9を挿入し、両者間
すなわちバルブハウジング11の内周面とシャフト9の
外周面との間に内側通路13が形成されている。そして
、前記シャフト9の先端部には内側トーピード8が固着
され、該内側トーピード8は前記外側トーピード7の内
周面の大径部7bに案内され前記シャフト9を介して軸
方向に往復動される。
Further, an annular outer torpedo 7 is fitted into the tip portion of the T-shaped nozzle body 5, and a cylindrical valve housing 11 is disposed concentrically within the T-shaped nozzle body 5 at its rear end. An outer passage 12 is formed between the inner peripheral surface of the T-shaped nozzle body 5 and the outer peripheral surface of the valve housing 11. Furthermore, a shaft 9 is inserted into the valve housing 11 and is reciprocated by a reciprocating drive means consisting of a hydraulic cylinder l port attached to the rear end face etc. and a piston lOa provided inside the shaft 9. An inner passage 13 is formed between the inner peripheral surface of the valve housing 11 and the outer peripheral surface of the shaft 9. An inner torpedo 8 is fixed to the tip of the shaft 9, and the inner torpedo 8 is guided by the large diameter portion 7b of the inner peripheral surface of the outer torpedo 7 and is reciprocated in the axial direction via the shaft 9. Ru.

さらに、前記外側トーピード7は、その円周方向に間隔
をおいて形成された軸方向に貫通する複数の貫通孔7a
を有し、該貫通孔7aを介して外側通路12とノズル孔
6aとが連通され、一方、内側トーピード8はその円周
方向に間隔をおいて形成された軸方向に貫通する複数の
貫通孔8dを有し、該貫通孔8dを介して内側通路13
とノズル孔6aとが連通される。
Further, the outer torpedo 7 has a plurality of through holes 7a formed at intervals in the circumferential direction and passing through in the axial direction.
The outer passage 12 and the nozzle hole 6a communicate with each other via the through hole 7a, while the inner torpedo 8 has a plurality of through holes formed at intervals in the circumferential direction and passing through in the axial direction. 8d, and the inner passage 13 is connected through the through hole 8d.
and the nozzle hole 6a are communicated with each other.

なお、上述の外側トーピード7の内周面に大径部7bを
設けるかわりに、外側トーピードの内周面を全長にわた
って大径とし、内側トーピード8のシール部8cが当接
されるシール用の環状突出部をその内周面に形成して内
側通路13を閉鎖するように構成してもよい。また、両
トーピード7.8の前記貫通孔?a、 8dの断面形状
は図示の円形のものに限らず、種々の形状とすることが
できる。
In addition, instead of providing the large diameter portion 7b on the inner circumferential surface of the outer torpedo 7 described above, the inner circumferential surface of the outer torpedo 7 has a large diameter over its entire length, and an annular sealing portion is formed on which the seal portion 8c of the inner torpedo 8 is abutted. A protrusion may be formed on the inner peripheral surface thereof to close the inner passage 13. Also, the through holes of both torpedoes 7.8? The cross-sectional shapes of a and 8d are not limited to the circular shapes shown in the drawings, but can be of various shapes.

次に、本実族゛例の動作について説明する。Next, the operation of this real family example will be explained.

先ず、サンドウィッチ成形については、第1図に示す油
圧シリンダlO内のピストンlOaを遠隔操作の油圧の
作用により所定の中間位置に移動させて、第3図(B)
に示すようにシャフト9を介して内側トーピード8を外
側通路12および内側通路13がともに開放される所定
の中間位置に移動させる。ついで、第1射出ユニットl
によりスキン層形成用の溶融合成樹脂を外側通路12内
へ、また第2射出ユニット2よりコア暦形成用の溶融合
成樹脂を内側通路13内へ圧入すると、両者はノズル6
a部において合流して層状の流れとなって図示しない金
型内へ射出されてサントウィッチ成形品を成形すること
ができる。
First, regarding sandwich forming, the piston lOa in the hydraulic cylinder lO shown in Fig. 1 is moved to a predetermined intermediate position by the action of remote-controlled hydraulic pressure, and the piston lOa shown in Fig. 3(B) is moved to a predetermined intermediate position by the action of remote-controlled hydraulic pressure.
The inner torpedo 8 is moved via the shaft 9 to a predetermined intermediate position where both the outer passage 12 and the inner passage 13 are open, as shown in FIG. Then, the first injection unit l
When the molten synthetic resin for forming the skin layer is press-injected into the outer passage 12 and the molten synthetic resin for forming the core calendar is injected from the second injection unit 2 into the inner passage 13, both of them are inserted into the nozzle 6.
They merge at part a to form a layered flow and are injected into a mold (not shown) to form a Santowich molded product.

次にシングル成形については、第1射出ユニット1また
は第2射出ユニット2の内いずれか一方のシャットオフ
バルブ3または4のみを開放し、他方のシャットオフバ
ルブを閉鎖するが、ここでは、例えば、第1射出ユニッ
トlのシャットオフバルブ3のみを開放して、第1射出
ユニットlによるシングル成形の場合について述べる。
Next, for single molding, only the shutoff valve 3 or 4 of either the first injection unit 1 or the second injection unit 2 is opened, and the other shutoff valve is closed, but here, for example, A case of single molding by the first injection unit 1 with only the shutoff valve 3 of the first injection unit 1 opened will be described.

第1図に示す油圧シリンダlOのピストンloaに油圧
を作用させて後退させることにより、第3図(C)に示
すように、シャフト9を介して内側トーピード8を最後
退位置に後退させてその後端シール部8cにより内側通
路13を閉鎖する。この状態で前記第1射出ユニット1
より外側通路12内へ溶融合成樹脂を圧入すると、該溶
融合成樹脂は外側トーピード7の各貫通孔7aを通して
ノズル孔6aより図示しない金型内へ射出されてシング
ル成形が行なわれる。
By applying hydraulic pressure to the piston loa of the hydraulic cylinder lO shown in FIG. 1 and retracting it, the inner torpedo 8 is retracted to the most retracted position via the shaft 9, as shown in FIG. 3(C), and then The inner passage 13 is closed by the end seal portion 8c. In this state, the first injection unit 1
When the molten synthetic resin is press-fitted into the outer passage 12, the molten synthetic resin passes through each through hole 7a of the outer torpedo 7 and is injected into a mold (not shown) from the nozzle hole 6a, thereby performing single molding.

さらに、上記サンドウィッチ成形の場合と同様に、第3
図(B)に示すように内側トーピード8を所定の中間位
置に移動させ、外側通路12および内側通路13をとも
に開放状態としてノズル孔6aに連通させ、第1射出ユ
ニット1または第2射出ユニット2のいずれか一方をシ
ャットオフバルブ3または4を閉じることにより閉鎖す
る。そして、開放されている一方の射出ユニットより溶
融合成樹脂を圧入して金型内へ射出し、他方の閉鎖され
ている射出ユニット側のガス供給口よりガスを圧入する
ことにより中空成形または発泡成形を行なう。
Furthermore, as in the case of sandwich molding, a third
As shown in Figure (B), the inner torpedo 8 is moved to a predetermined intermediate position, the outer passage 12 and the inner passage 13 are both opened and communicated with the nozzle hole 6a, and the first injection unit 1 or the second injection unit 2 Either one of them is closed by closing the shutoff valve 3 or 4. Molten synthetic resin is then press-fitted into the mold through one open injection unit, and gas is press-fitted through the gas supply port on the other closed injection unit to perform blow molding or foam molding. Do this.

[発明の効果1 本発明は、上記のとおり構成されているので、以下に記
載するような効果を奏する。
[Effects of the Invention 1 The present invention is configured as described above, and therefore has the following effects.

請求項1記載のT形ノズルを有する二軸射出成形機は、
内側トーピードのみを往復動させるだけの簡単な構成で
あるので強度的に勝れる上、サントウィッチ成形、シン
グル成形、中空成形および発泡成形の各種の成形が可能
であり、−台で数台の専用機を設備したと同等のメリッ
トがあり、設備費の大幅な低減が可能となる。
A twin-screw injection molding machine having a T-shaped nozzle according to claim 1,
It has a simple structure that only reciprocates the inner torpedo, so it is superior in strength, and various types of molding such as Santowich molding, single molding, hollow molding, and foam molding are possible. It has the same benefits as installing a machine, and can significantly reduce equipment costs.

請求項2記載のT形ノズルを有する二軸射出成形機は、
上記効果のほか、分解して点検または清掃を簡単に行な
うことができる。
A twin-screw injection molding machine having a T-shaped nozzle according to claim 2,
In addition to the above effects, it can be disassembled for easy inspection or cleaning.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明のT形ノズルの主要部断面図、第2図は
第1図A−A線に沿う断面図、第3図は内側トーピード
の移動位置を示す要部断面図であって、(A)は最前進
位置、(B)は所定の中間位置、(C)は最後退位置を
それぞれ示す図である。 l・・・・・・・・第1射出ユニット、2・・・・・・
・・第2射出ユニット、34・・・・シャットオフバル
ブ、 5・・・・・・・・T形ノズル本体、 5a・・・・・・・・基部、 5b・・・・・・・・先端部、 6・・・・・・・・ノズルチップ、 6a・・・・・・・・ノズル孔、 7・・・・・・・・外側トーピード、 7a・・・・・・・・貫通孔、 7b・・・・・・・・大径部、 8・・・・・・・・内側トーピード、 8a・・・・・・・・ボス部、 8b・・・・・・・・先端シール面、 8c・・・・・・・・後端シール部、 8d・・・・・・・・貫通孔、 9・・・・・・・・シャフト、 lO・・・・・・・・油圧シリンダ、 10a・・・・・・・ピストン、 11・・・・・・・・バルブハウジング、12・・・・
・・・・外側通路、 13・・・・・・・・内側通路、 14、15・・・・ガス供給口、 16.17・・・・接続部、 !a、  Ib、 16a、  +7a・・−フランジ
部材。 86ホぐ1部
FIG. 1 is a sectional view of the main part of the T-shaped nozzle of the present invention, FIG. 2 is a sectional view taken along the line A-A in FIG. , (A) is a diagram showing the most advanced position, (B) is a predetermined intermediate position, and (C) is a diagram showing the most retracted position. l......First injection unit, 2...
...Second injection unit, 34...Shutoff valve, 5...T-shaped nozzle body, 5a...Base, 5b...... Tip, 6...Nozzle tip, 6a...Nozzle hole, 7...Outer torpedo, 7a...Through hole , 7b......Large diameter part, 8...Inner torpedo, 8a...Boss part, 8b...Tip sealing surface , 8c......Rear end seal part, 8d...Through hole, 9...Shaft, lO......Hydraulic cylinder, 10a...Piston, 11...Valve housing, 12...
...Outer passage, 13...Inner passage, 14, 15...Gas supply port, 16.17...Connection part, ! a, Ib, 16a, +7a...-Flange member. 86 Hog Part 1

Claims (1)

【特許請求の範囲】 1、第1射出ユニット(1)および第2射出ユニット(
2)にそれぞれシャットオフ機構(3、4)を介してT
形ノズル本体(5)を接続し、該T形ノズル本体(5)
内の先端部位に環状の外側トーピード(7)を嵌着する
とともに、その後端部に前記T形ノズル本体(5)内に
配設された円筒状のバルブハウジング(11)を接続し
て、T形ノズル本体(5)の内周面とバルブハウジング
(11)の外周面との間に外側通路(12)を形成し、
前記バルブハウジング(11)内に往復駆動手段(10
、10a)により往復動されるシャフト(9)を挿入し
て両者間に内側通路(13)を形成させ、前記外側トー
ピード(7)の内周面に摺動自在に案内される内側トー
ピード(8)を前記シャフト先端部に固着し、該内側ト
ーピード(8)のボス部(8a)に先端シール面(8b
)および後端シール部(8c)を設け、さらに、前記T
形ノズル本体(5)の二つの接続部(16、17)にそ
れぞれガス供給口(14、15)を設けたT形ノズルを
有する二軸射出成形機。 2、T形ノズル本体(5)が複数の部分に分解可能であ
る請求項1記載のT形ノズルを有する二軸射出成形機。
[Claims] 1. A first injection unit (1) and a second injection unit (
2) through the respective shutoff mechanisms (3, 4).
Connect the T-shaped nozzle body (5) and connect the T-shaped nozzle body (5).
An annular outer torpedo (7) is fitted to the tip of the T-shaped nozzle body (5), and a cylindrical valve housing (11) disposed inside the T-shaped nozzle body (5) is connected to the rear end of the T-shaped nozzle body (5). forming an outer passageway (12) between the inner peripheral surface of the shaped nozzle body (5) and the outer peripheral surface of the valve housing (11);
A reciprocating drive means (10) is provided within the valve housing (11).
, 10a) to form an inner passageway (13) therebetween, and an inner torpedo (8) slidably guided on the inner peripheral surface of the outer torpedo (7). ) is fixed to the tip of the shaft, and a tip sealing surface (8b) is attached to the boss (8a) of the inner torpedo (8).
) and a rear end seal portion (8c), and furthermore, the T
A two-shaft injection molding machine having a T-shaped nozzle with gas supply ports (14, 15) provided at two connecting parts (16, 17) of the nozzle body (5), respectively. 2. The twin-screw injection molding machine with a T-shaped nozzle according to claim 1, wherein the T-shaped nozzle body (5) can be disassembled into a plurality of parts.
JP63295984A 1988-11-25 1988-11-25 Twin injection molder having t-nozzle Granted JPH02143821A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63295984A JPH02143821A (en) 1988-11-25 1988-11-25 Twin injection molder having t-nozzle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63295984A JPH02143821A (en) 1988-11-25 1988-11-25 Twin injection molder having t-nozzle

Publications (2)

Publication Number Publication Date
JPH02143821A true JPH02143821A (en) 1990-06-01
JPH0478451B2 JPH0478451B2 (en) 1992-12-11

Family

ID=17827633

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63295984A Granted JPH02143821A (en) 1988-11-25 1988-11-25 Twin injection molder having t-nozzle

Country Status (1)

Country Link
JP (1) JPH02143821A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0642135U (en) * 1992-11-11 1994-06-03 株式会社日本製鋼所 Converging nozzle device of two-head injection molding machine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0642135U (en) * 1992-11-11 1994-06-03 株式会社日本製鋼所 Converging nozzle device of two-head injection molding machine

Also Published As

Publication number Publication date
JPH0478451B2 (en) 1992-12-11

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