JPH07144347A - Opening and closing device of gate of hot runner of mold - Google Patents

Opening and closing device of gate of hot runner of mold

Info

Publication number
JPH07144347A
JPH07144347A JP29504093A JP29504093A JPH07144347A JP H07144347 A JPH07144347 A JP H07144347A JP 29504093 A JP29504093 A JP 29504093A JP 29504093 A JP29504093 A JP 29504093A JP H07144347 A JPH07144347 A JP H07144347A
Authority
JP
Japan
Prior art keywords
gate
chip
valve pin
opening
molding die
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
JP29504093A
Other languages
Japanese (ja)
Other versions
JP2908971B2 (en
Inventor
Hiroyuki Yoshida
浩之 吉田
Satoru Yamauchi
哲 山内
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.)
Panasonic Electric Works Co Ltd
Original Assignee
Matsushita Electric 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 Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP5295040A priority Critical patent/JP2908971B2/en
Publication of JPH07144347A publication Critical patent/JPH07144347A/en
Application granted granted Critical
Publication of JP2908971B2 publication Critical patent/JP2908971B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • B29C45/17Component parts, details or accessories; Auxiliary operations
    • B29C45/26Moulds
    • B29C45/27Sprue channels ; Runner channels or runner nozzles
    • B29C45/28Closure devices therefor
    • B29C45/2806Closure devices therefor consisting of needle valve systems
    • 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
    • B29C45/17Component parts, details or accessories; Auxiliary operations
    • B29C45/26Moulds
    • B29C45/27Sprue channels ; Runner channels or runner nozzles
    • B29C45/28Closure devices therefor
    • B29C45/2806Closure devices therefor consisting of needle valve systems
    • B29C2045/2855Closure devices therefor consisting of needle valve systems intersecting the nozzle or runner channel

Landscapes

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

Abstract

PURPOSE:To prevent the stagnation of a resin by providing a molten resin passage and the valve pin opening and closing the gate provided to the leading end thereof to the chip constituting a hot runner and differentiating the positions of the resin passage and the valve pin to allow the resin passage and the valve pin to cross. CONSTITUTION:A chip 1 is fitted to a fixed retaining mold 6 and a receiving plate 17 and a molten resin passage 2 is bored in the chip 1 so as to pierce the chip longitudinally. The molten resin passage 2 is formed so as to be shifted from the center of the chip 1 and the gate 4 at the leading end of the passage 2 is allowed to communicate with a cavity 20 and the base end of the passage 2 is allowed to communicate with the passage of a manifold 9. A valve pin 3 pierces the center of the chip 1 and the gate 4 is opened and closed by the tip of the pin 3. Therefore, the valve pin 3 is not positioned within the resin passage 2 and the valve pin 3 is inserted obliquely with respect to the center of the chip 1 so as to be allowed to cross the gate 4. By this constitution, the valve pin 3 is driven so as not to pass through the resin passage 2 and the stagnation of the resin passing through the resin passage 2 is prevented.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、スプルーレスまたはラ
ンナーレスなどのホットランナーを有する成形金型にお
いて、ホットランナーのゲートを開閉する装置の構造に
関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a device for opening and closing a gate of a hot runner in a molding die having a sprueless or runnerless hot runner.

【0002】[0002]

【従来の技術】従来、この種のホットランナーのゲート
開閉装置としては特開平2−179718号公報に開示
されるものがある。これは図12に示すようにホットラ
ンナーを構成するチップ1にチップ1の中央を貫通する
ように溶融樹脂流路2を設けてあり、溶融樹脂流路2内
にバルブピン3を挿通してあり、バルブピン3を前後に
駆動することによりバルブピン3の先端で溶融樹脂通路
2の先端のゲート4を開閉するようになっている。
2. Description of the Related Art Conventionally, as a gate opening / closing device for this kind of hot runner, there is one disclosed in Japanese Patent Application Laid-Open No. 2-179718. As shown in FIG. 12, a molten resin flow channel 2 is provided in a chip 1 forming a hot runner so as to penetrate the center of the chip 1, and a valve pin 3 is inserted into the molten resin flow channel 2. By driving the valve pin 3 back and forth, the tip of the valve pin 3 opens and closes the gate 4 at the tip of the molten resin passage 2.

【0003】[0003]

【発明が解決しようとする課題】ところが、上記従来例
にあっては、バルブピン3が溶融樹脂流路2内に位置す
るために樹脂の滞留劣化を完全に防げず、製品の品質低
下を招くという問題がある。またバルブピン3が溶融樹
脂流路2内に位置するためにゲート開閉精度及び調整要
素のレベルが低く、多数個取りの成形金型において製品
の品質にばらつきが生じるという問題があった。
However, in the above-mentioned conventional example, since the valve pin 3 is located in the molten resin flow path 2, it is not possible to completely prevent the deterioration of resin retention, which leads to the deterioration of product quality. There's a problem. Further, since the valve pin 3 is located in the molten resin flow path 2, the gate opening / closing accuracy and the level of the adjusting element are low, and there is a problem in that the quality of the product varies in a multi-cavity molding die.

【0004】本発明は上記問題点に鑑みてなされたもの
であって、本発明の目的とするところは樹脂の滞留劣化
を最小に防ぐことができて品質のよい製品を得ることが
できる成形金型のホットランナーのゲートの開閉装置を
提供するにある。
The present invention has been made in view of the above problems, and an object of the present invention is to prevent the resin from staying and deteriorating to a minimum and obtain a molding product of high quality. It is to provide mold hot runner gate opener.

【0005】[0005]

【課題を解決するための手段】上記目的を達成するため
本発明成形金型のホットランナーのゲートの開閉装置
は、ホットランナーを構成するチップ1に溶融樹脂流路
2と溶融樹脂通路2の先端のゲート4を開閉するバルブ
ピン3とを設け、溶融樹脂流路2の位置とバルブピン3
の位置を異ならせると共に溶融樹脂流路2のゲート4に
バルブピン3の先端を交差させてゲート4を開閉するよ
うにし、電動モータ5を有するゲート開閉駆動手段でバ
ルブピン3を駆動するようにして成ることを特徴とす
る。
In order to achieve the above object, a hot-runner gate opening / closing device of a molding die of the present invention comprises a molten resin passage 2 and a tip of the molten resin passage 2 in a chip 1 constituting the hot runner. And the valve pin 3 for opening and closing the gate 4 of the
The gate pin 4 of the molten resin flow path 2 is opened and closed by intersecting the tip of the valve pin 3 with the gate 4 of the molten resin flow path 2, and the valve pin 3 is driven by a gate opening / closing drive means having an electric motor 5. It is characterized by

【0006】またバルブピン3を回転させながらゲート
4を閉じるようにして成ることを特徴とすることも好ま
しい。またゲート開閉駆動手段を備えたチップ1を成形
金型Aの固定型板6と射出成形機Bの射出シリンダ7と
の間に配置し、ゲート開閉駆動手段を備えたチップ1を
射出シリンダ7側に固定すると共にチップ1の先端を固
定型板6に当接して成ることを特徴とすることも好まし
い。またゲート開閉駆動手段を備えたチップ1を成形金
型A内に配置して成ることを特徴とすることも好まし
い。また成形金型A内に複数個のチップ1を配置し、各
チップ1のバルブピン3をピンプレート8に固定し、ゲ
ート開閉駆動手段で複数個のバルブピン3を同時に駆動
してゲートを開閉するようにして成ることを特徴とする
ことも好ましい。また成形金型Aに円形のマニホールド
9を設け、円形のマニホールド9から放射状に広がるよ
うに複数本のチップ1を配置すると共にマニホールド9
の流路を各チップ1の溶融樹脂流路2に連通させて成る
ことを特徴とすることも好ましい。
It is also preferable that the gate 4 is closed while rotating the valve pin 3. Further, the chip 1 equipped with the gate opening / closing driving means is arranged between the fixed mold plate 6 of the molding die A and the injection cylinder 7 of the injection molding machine B, and the chip 1 equipped with the gate opening / closing driving means is mounted on the injection cylinder 7 side. It is also preferable that the tip of the chip 1 is brought into contact with the fixed template 6 while being fixed to It is also preferable that the chip 1 provided with the gate opening / closing driving means is arranged in the molding die A. Further, a plurality of chips 1 are arranged in the molding die A, the valve pins 3 of each chip 1 are fixed to the pin plate 8, and the gate opening / closing driving means simultaneously drives the plurality of valve pins 3 to open / close the gate. It is also preferable to be characterized in that Further, a circular manifold 9 is provided in the molding die A, a plurality of chips 1 are arranged so as to spread radially from the circular manifold 9, and the manifold 9 is also provided.
It is also preferable that the channel of (1) is communicated with the molten resin channel 2 of each chip 1.

【0007】[0007]

【作用】上記構成によれば、ゲート開閉駆動手段でバル
ブピン3を駆動すれば、バルブピン3の先端にてゲート
4を開閉できる。このとき溶融樹脂流路2内にバルブピ
ン3が位置しないため、溶融樹脂を滞留させるものがな
くて樹脂の滞留劣化を最小に防ぐことができると共に樹
脂の色替えをするときも良好な色替え特性が得られる。
また溶融樹脂流路2のゲート4にバルブピン3の先端を
交差させて開閉するようになっているため、短いストロ
ークでゲートを確実に開閉できてゲート開閉精度を向上
できると共にゲートの開閉駆動に要する電力を少電力に
できる。
According to the above construction, the gate 4 can be opened and closed at the tip of the valve pin 3 by driving the valve pin 3 by the gate opening / closing drive means. At this time, since the valve pin 3 is not positioned in the molten resin flow path 2, there is no one that retains the molten resin, so that deterioration of the retention of the resin can be prevented to a minimum and good color change characteristics can be obtained even when the color of the resin is changed. Is obtained.
Further, since the gate 4 of the molten resin flow path 2 is opened and closed by intersecting the tip of the valve pin 3, the gate can be opened and closed reliably with a short stroke, the gate opening and closing accuracy can be improved, and the gate opening and closing drive is required. Power can be reduced.

【0008】またバルブピン3を回転させながらゲート
4を閉じるようにしてあると、バルブピン3の片減りを
防止できる。またゲート開閉駆動手段を備えたチップ1
を成形金型Aの固定型板6と射出成形機Bの射出シリン
ダ7との間に配置し、ゲート開閉駆動手段を備えたチッ
プ1を射出シリンダ7側に固定すると共にチップ1の先
端を固定型板6に当接してあると、成形金型Aにゲート
開閉装置を組み込むもののように各成形金型Aにゲート
開閉装置を要せず、射出シリンダ7側に設けたゲート開
閉装置を複数種の成形金型Aに共用できる。
If the gate 4 is closed while rotating the valve pin 3, it is possible to prevent the valve pin 3 from being worn out. Further, a chip 1 equipped with a gate opening / closing driving means
Is disposed between the fixed mold plate 6 of the molding die A and the injection cylinder 7 of the injection molding machine B to fix the chip 1 having the gate opening / closing drive means to the injection cylinder 7 side and the tip of the chip 1 is fixed. When in contact with the mold plate 6, there is no need for a gate opening / closing device for each molding die A as in the case of incorporating a gate opening / closing device in the molding die A, and a plurality of gate opening / closing devices provided on the injection cylinder 7 side It can be shared with the molding die A.

【0009】またゲート開閉駆動手段を備えたチップ1
を成形金型A内に配置してあると、成形金型Aにゲート
開閉装置を組み込んで小型化が図れる。また成形金型A
内に複数個のチップ1を配置し、各チップ1のバルブピ
ン3をピンプレート8に固定し、ゲート開閉駆動手段で
複数個のバルブピン3を同時に駆動してゲート4を開閉
するようにしてあると、複数のバルブピン3を1台の電
動モータ5で制御できる。
A chip 1 having a gate opening / closing driving means
If the is arranged in the molding die A, the gate opening / closing device can be incorporated in the molding die A to reduce the size. Molding die A
A plurality of chips 1 are arranged inside, the valve pins 3 of each chip 1 are fixed to the pin plate 8, and a plurality of valve pins 3 are simultaneously driven by the gate opening / closing driving means to open / close the gate 4. , A plurality of valve pins 3 can be controlled by one electric motor 5.

【0010】また成形金型Aに円形のマニホールド9を
設け、円形のマニホールド9から放射状に広がるように
複数本のチップ1を配置すると共にマニホールド9の流
路を各チップ1の溶融樹脂流路2に連通させると、マニ
ホールド9を介して樹脂を供給するものでも流路を最短
にできる。
Further, a circular manifold 9 is provided in the molding die A, a plurality of chips 1 are arranged so as to spread radially from the circular manifold 9, and a channel of the manifold 9 is formed by a molten resin channel 2 of each chip 1. Even if the resin is supplied through the manifold 9, the flow path can be minimized.

【0011】[0011]

【実施例】図2は射出成形装置の全体を示すものであ
る。基台11上の右側には射出成形機Bを搭載してあ
り、射出成形機Bは射出シリンダ7、射出スクリュー1
2、ホッパー13、射出ノズル14等を有している。基
台11上の左側には成形金型Aを配置してあり、この成
形金型Aは固定側金型A1 と可動側金型A2 で構成され
ている。固定側金型A1 は固定プラテン15に取り付け
られ、可動側金型A2 は左右に移動自在な可動プラテン
16に取り付けられている。固定側金型A1 は図1に示
すように固定型板6、受け板17、取り付け板18等で
構成され、内部にホットランナーを構成するチップ1や
マニホールド9を内装してある。可動側金型A2 は可動
型板19にて形成されており、可動型板19を固定型板
6に合致させたとき可動型板19と固定型板6との間に
キャビティ20が形成されるようになっている。
EXAMPLE FIG. 2 shows the entire injection molding apparatus. An injection molding machine B is mounted on the right side of the base 11, and the injection molding machine B includes an injection cylinder 7 and an injection screw 1.
2, it has a hopper 13, an injection nozzle 14 and the like. A molding die A is arranged on the left side of the base 11, and the molding die A is composed of a fixed side die A 1 and a movable side die A 2 . The fixed-side mold A 1 is attached to the fixed platen 15, and the movable-side mold A 2 is attached to the movable platen 16 which is movable left and right. As shown in FIG. 1, the fixed-side mold A 1 is composed of a fixed mold plate 6, a receiving plate 17, a mounting plate 18, and the like, and internally contains a chip 1 and a manifold 9 that form a hot runner. The movable mold A 2 is formed of a movable mold plate 19, and when the movable mold plate 19 is fitted to the fixed mold plate 6, a cavity 20 is formed between the movable mold plate 19 and the fixed mold plate 6. It has become so.

【0012】固定型板6及び受け板17にはチップ1を
装着してあり、チップ1にはチップの長手方向に貫通す
るように溶融樹脂流路2を穿孔してある。この溶融樹脂
流路2はチップ1のセンターに対してずらせて形成して
あり、溶融樹脂流路2の先端のゲート4をキャビティ2
0に連通させてあり、溶融樹脂流路2の基端をマニホー
ルド9の流路に連通させてある。チップ1のセンターに
はバルブピン3を挿通してあり、バルブピン3が長手方
向に摺動することでバルブピン3の先端でゲート4を開
閉するようになっている。溶融樹脂流路2をチップ1の
センターに対してずらせたこととバルブピン3をセンタ
ーに位置させたことにより、溶融樹脂流路2内にバルブ
ピン3が挿通されないようになっている。またゲート4
ではバルブピン3の先端がゲート4に対して交差してお
り、バルブピン3をゲート4に対して交差する方向に摺
動させてゲート4を開閉できるようになっている。また
固定側金型A1 には電動モータ5を配置してあり、電動
モータ5にてウォームギヤ22、スクリューギヤ23を
介してバルブピン3を往復駆動できるようになってい
る。24はスペーサである。
A chip 1 is mounted on the fixed mold plate 6 and the receiving plate 17, and a molten resin channel 2 is formed in the chip 1 so as to penetrate in the longitudinal direction of the chip. The molten resin channel 2 is formed so as to be displaced from the center of the chip 1, and the gate 4 at the tip of the molten resin channel 2 is formed in the cavity 2
0, and the base end of the molten resin flow channel 2 is communicated with the flow channel of the manifold 9. The valve pin 3 is inserted through the center of the chip 1, and the valve pin 3 slides in the longitudinal direction to open and close the gate 4 at the tip of the valve pin 3. By displacing the molten resin flow channel 2 with respect to the center of the chip 1 and locating the valve pin 3 at the center, the valve pin 3 cannot be inserted into the molten resin flow channel 2. Also gate 4
In this case, the tip of the valve pin 3 intersects the gate 4, and the gate 4 can be opened and closed by sliding the valve pin 3 in the direction intersecting the gate 4. Further, the electric motor 5 is arranged in the stationary mold A 1 , and the valve pin 3 can be reciprocally driven by the electric motor 5 via the worm gear 22 and the screw gear 23. 24 is a spacer.

【0013】射出成形機Bの射出ノズル14をマニホー
ルド9の流路に連通させ、固定側金型A1 に可動側金型
2 を合致させ、射出ノズル14から樹脂を射出すると
共にゲート4を開放すると、キャビティ20に樹脂が充
填され、キャビティ20に所定量の樹脂が注入されると
ゲート4が閉じられ、キャビティ20内で成形品Cが成
形され、可動側金型A2 を開くことにより成形品Cが取
り出される。このように成形することにより、ランナー
レス、スプルーレスで成形品Cが形成される。そしてチ
ップ1内及びマニホールド9内の樹脂の溶融状態が維持
されて次の成形に用いられる。
The injection nozzle 14 of the injection molding machine B is communicated with the flow path of the manifold 9, the fixed side mold A 1 and the movable side mold A 2 are aligned, resin is injected from the injection nozzle 14 and the gate 4 is connected. When opened, the cavity 20 is filled with resin, and when a predetermined amount of resin is injected into the cavity 20, the gate 4 is closed, the molded product C is molded in the cavity 20, and the movable side mold A 2 is opened. The molded product C is taken out. By molding in this way, a molded product C is formed without a runner and without a sprue. The molten state of the resin in the chip 1 and the manifold 9 is maintained and used for the next molding.

【0014】図3(a)は上記実施例のチップ1部分を
示す図であって、溶融樹脂流路2がセンターに対してず
らせてあり、バルブピン3をチップ1のセンターに挿通
してある。図3(b)は他の実施例であり、チップ1の
センターに溶融樹脂流路2を設けてあり、チップ1のセ
ンターに対して傾斜するように側方から斜めにバルブピ
ン3を挿通してあり、バルブピン3の先端をゲート4に
交差させてある。上記のように溶融樹脂流路2とバルブ
ピン3の挿通位置を異ならせて溶融樹脂流路2内にバル
ブピン3が位置しないようにしてあるため樹脂が滞留し
にくく、樹脂の滞留劣化を防止でき、また樹脂の色替え
を行うとき良好な色替え性が得られる。またバルブピン
3をゲート4に交差させて開閉するために短いバルブピ
ン3のストロークで正確にゲート開閉ができ、ゲート開
閉精度が50μmで可能であると共に少電力ですむ。
FIG. 3 (a) is a view showing the chip 1 portion of the above embodiment, in which the molten resin flow path 2 is displaced from the center, and the valve pin 3 is inserted through the center of the chip 1. FIG. 3B shows another embodiment, in which a molten resin flow channel 2 is provided in the center of the chip 1, and the valve pin 3 is inserted obliquely from the side so as to be inclined with respect to the center of the chip 1. Yes, the tip of the valve pin 3 crosses the gate 4. As described above, the insertion positions of the molten resin flow path 2 and the valve pin 3 are made different so that the valve pin 3 is not located in the molten resin flow path 2, so that the resin does not easily stay and the deterioration of the stay of the resin can be prevented. Further, when the color of the resin is changed, good color changeability can be obtained. In addition, since the valve pin 3 crosses the gate 4 to open and close, the gate pin can be opened and closed accurately with a short stroke of the valve pin 3, the gate opening and closing accuracy is 50 μm, and low power is required.

【0015】図4は上記実施例の電動モータ5でバルブ
ピン3を駆動する構造を示すものである。電動モータ5
の出力軸25にはウォームギヤ22を装着してあり、バ
ルブピン3の基端にはスクリューギヤ23を結合してあ
り、ギヤ台26にスクリューギヤ23を螺合してある。
スクリューギヤ23にはウォームホイール部27を設け
てあり、ウォームホイール部27にウォームギヤ22を
歯合させてある。そして電動モータ5でウォームギヤ2
2を駆動することによりスクリューギヤ23を回転駆動
し、バルブピン3を回転させながら前後に移動させてゲ
ート4を開閉できるようになっている。このようにバル
ブピン3を回転させながら前進させてゲート4を閉じる
ようになっていると、バルブピン3の片減り摩耗を防止
できる。図5は他例であり、電動モータ5の出力軸25
のピニオン28をベベルギヤ29に歯合させてあり、ベ
ベルギヤ29をベベルギヤ30に歯合させてあり、バル
ブピン3の基端のスクリューギヤ31をベベルギヤ30
内に挿通してあり、スクリューギヤ31をギヤ台26の
雌ねじ部42に螺合してある。ベベルギヤ30の穴及び
スクリューギヤ31の断面形状は図5(c)に示す十字
状の断面形状にしてスプライン結合させてある。この場
合も電動モータ5を駆動することにより、ピニオン2
8、ベベルギヤ29,30及びスクリューギヤ31を介
してバルブピン3を回転させながら前後に移動させるこ
とができるようになっている。つまり、ベベルギヤ30
と一緒にスクリューギヤ31が回転することによりバル
ブピン3が回転し、またスクリューギヤ31が雌ねじ部
42に対して回転することによりバルブピン3が前後に
移動するようになっている。
FIG. 4 shows a structure for driving the valve pin 3 by the electric motor 5 of the above embodiment. Electric motor 5
A worm gear 22 is attached to the output shaft 25, a screw gear 23 is coupled to the base end of the valve pin 3, and a screw gear 23 is screwed to a gear base 26.
The screw gear 23 is provided with a worm wheel 27, and the worm gear 22 is meshed with the worm wheel 27. And the worm gear 2 with the electric motor 5
The screw gear 23 is driven to rotate by driving the valve 2, and the gate 4 can be opened and closed by moving the valve pin 3 back and forth while rotating it. When the valve pin 3 is rotated and moved forward to close the gate 4 in this way, uneven wear of the valve pin 3 can be prevented. FIG. 5 is another example, and the output shaft 25 of the electric motor 5 is shown.
Of the pinion 28 is meshed with the bevel gear 29, the bevel gear 29 is meshed with the bevel gear 30, and the screw gear 31 at the base end of the valve pin 3 is bevel gear 30.
The screw gear 31 is screwed into the female screw portion 42 of the gear base 26. The cross-sectional shape of the hole of the bevel gear 30 and the screw gear 31 is a cross-shaped cross-sectional shape shown in FIG. In this case as well, by driving the electric motor 5, the pinion 2
The valve pin 3 can be moved back and forth while rotating through the 8, bevel gears 29, 30 and the screw gear 31. That is, the bevel gear 30
When the screw gear 31 rotates together with the valve pin 3, the valve pin 3 rotates, and when the screw gear 31 rotates with respect to the female screw portion 42, the valve pin 3 moves back and forth.

【0016】図6は固定側金型A1 にゲート開閉駆動手
段を有するチップ1を組み込んだ状態を示す。固定側金
型A1 内にはチップ1やマニホールド9を内装してあ
り、バルブピン5を斜めに挿通してある。受け板17と
取り付け板18との間にはベース板32を取り付けてあ
り、ベース板32の外には電動モータ5を取り付けてあ
る。ベース板32にはスライダー33をベース板32に
スライド自在に取り付けてあると共にバルブピン3のス
ライドピン34をスライド自在に取り付けてある。電動
モータ5の出力軸25に設けたスクリューギヤ35はス
ライダー33に歯合させてあり、スライダー33の長孔
36にスライドピン34の突起37をスライド自在に嵌
合してある。そして電動モータ5を駆動することにより
スクリューギヤ35でスライダー33をスライドさせ、
長孔36、突起37を介してスライドピン34をスライ
ドさせてバルブピン3をスライドさせることができるよ
うになっている。上記のように成形金型Aの固定側金型
1 にゲート開閉装置を組み込むと小型のユニットにで
きる。本実施例のようにバルブピン3を斜めに挿通して
マニホールド9の下方に電動モータ5やスライダー33
やスライドピン34等を配置すると、一層小型のユニッ
トにできると共に、組み立て分解保全が比較的に容易に
できる。
FIG. 6 shows a state in which the chip 1 having the gate opening / closing driving means is incorporated in the fixed side mold A 1 . The chip 1 and the manifold 9 are internally provided in the fixed side mold A 1 , and the valve pin 5 is obliquely inserted. A base plate 32 is mounted between the receiving plate 17 and the mounting plate 18, and the electric motor 5 is mounted outside the base plate 32. A slider 33 is slidably attached to the base plate 32 and a slide pin 34 of the valve pin 3 is slidably attached to the base plate 32. A screw gear 35 provided on the output shaft 25 of the electric motor 5 is meshed with a slider 33, and a projection 37 of a slide pin 34 is slidably fitted in a long hole 36 of the slider 33. Then, by driving the electric motor 5, the slider 33 is slid by the screw gear 35,
The slide pin 34 can be slid through the elongated hole 36 and the protrusion 37 to slide the valve pin 3. As described above, a small unit can be obtained by incorporating the gate opening / closing device in the fixed mold A 1 of the molding mold A. As in the present embodiment, the valve pin 3 is obliquely inserted and the electric motor 5 and the slider 33 are provided below the manifold 9.
By arranging the slide pins 34 and the like, the unit can be made smaller, and the assembly and disassembly maintenance can be relatively easily performed.

【0017】図7は他の実施例を示す。複数のチップ1
に挿通した各バルブピン3の基端を1枚のピンプレート
8に結合してあり、1枚のピンプレート8を駆動するこ
とにより複数のバルブピン3を同時に駆動してゲート4
の開閉ができるようになっている。ピンプレート8には
スクリューギヤ41を螺合してあり、電動モータ5で駆
動されるウォーム軸38をスクリューギヤ41のホイー
ル部39に歯合させてある。しかして電動モータ5でウ
ォーム軸38を駆動すると、スクリューギヤ41を回転
駆動し、ピンプレート8を駆動して複数のバルブピン3
を同時に駆動できる。上記のように構成されていると、
複数のバルブピン3を1台の電動モータ5で制御可能で
あり、また複数のゲート調整が不要であると共にゲート
開閉のばらつきがない。
FIG. 7 shows another embodiment. Multiple chips 1
The base end of each valve pin 3 inserted into the gate is connected to one pin plate 8, and a plurality of valve pins 3 are simultaneously driven by driving one pin plate 8 to drive the gate 4
It can be opened and closed. A screw gear 41 is screwed onto the pin plate 8, and a worm shaft 38 driven by the electric motor 5 is meshed with a wheel portion 39 of the screw gear 41. When the worm shaft 38 is driven by the electric motor 5, the screw gear 41 is driven to rotate and the pin plate 8 is driven to drive the plurality of valve pins 3.
Can be driven simultaneously. When configured as above,
A plurality of valve pins 3 can be controlled by a single electric motor 5, a plurality of gate adjustments are unnecessary, and there is no variation in gate opening / closing.

【0018】図8(a)は他の実施例を示す。本実施例
の場合、円形のマニホールド9を固定側金型A1 のセン
ターに配置してあり、円形のマニホールド9を中心に放
射状に広がるように複数本のチップ1を配置してあり、
マニホールド9の流路と複数本のチップ1の溶融樹脂流
路2とを連通させてある。つまり、従来は図8(c)に
示すようにマニホールド9に複数本の分岐流路40を設
け、複数のチップ1の溶融樹脂流路2に分岐流路40を
連通させてあり、分岐流路40にて樹脂を供給する流路
が長くなっていたが、本実施例の場合、図8(b)に示
すように分岐流路40なしにマニホールド9を直接チッ
プ1の溶融樹脂流路2に連通させることができる。この
ため樹脂の流路を最短にできて複数個同時成形に最適で
ある。
FIG. 8A shows another embodiment. In the case of the present embodiment, the circular manifold 9 is arranged at the center of the fixed side mold A 1 , and the plurality of chips 1 are arranged so as to spread radially around the circular manifold 9.
The flow path of the manifold 9 and the molten resin flow path 2 of the plurality of chips 1 are communicated with each other. That is, conventionally, as shown in FIG. 8C, the manifold 9 is provided with a plurality of branch channels 40, and the molten resin channels 2 of the plurality of chips 1 are communicated with the branch channels 40. Although the flow channel for supplying the resin was long at 40, in the case of this embodiment, as shown in FIG. 8B, the manifold 9 is directly connected to the molten resin flow channel 2 of the chip 1 without the branch flow channel 40. Can be communicated. Therefore, the resin flow path can be minimized, which is suitable for simultaneous molding of a plurality of resins.

【0019】図9、図10、図11は他の実施例であ
る。本実施例の場合、固定側金型A1は固定側型板6だ
けで形成されている。射出成型機Bの射出シリンダ7の
先端にチップ1の基端を固定してあり、チップ1に対し
て傾斜するようにバルブピン3を挿通してある。電動モ
ータ5、ベース板32、スライダー33及びスライドピ
ン34等は基台11に取り付けてあり、これらでバルブ
ピン3を駆動できるようになっている。上記チップ1は
固定プラテン15に挿通してあり、チップ1の先端を固
定型板6に当接してある。このようにしてあると、固定
側金型A1 側にゲート開閉装置を組み込むもののように
各成形金型Aに上記ゲート開閉装置を取り付ける必要が
なく、射出シリンダ7側に取り付けたゲート開閉装置で
複数種の成形金型Aのゲート開閉装置を共用できる。
FIG. 9, FIG. 10 and FIG. 11 show another embodiment. In the case of the present embodiment, the fixed side mold A 1 is formed only by the fixed side mold plate 6. The base end of the chip 1 is fixed to the tip of the injection cylinder 7 of the injection molding machine B, and the valve pin 3 is inserted so as to be inclined with respect to the chip 1. The electric motor 5, the base plate 32, the slider 33, the slide pin 34, and the like are attached to the base 11, and the valve pin 3 can be driven by these. The chip 1 is inserted through the stationary platen 15, and the tip of the chip 1 is in contact with the stationary template 6. By doing so, it is not necessary to attach the above-mentioned gate opening / closing device to each molding die A as in the case of incorporating the gate opening / closing device on the fixed side die A 1 side, and the gate opening / closing device attached to the injection cylinder 7 side can be used. The gate opening / closing device for a plurality of types of molding dies A can be shared.

【0020】[0020]

【発明の効果】本発明は叙述のように溶融樹脂流路の位
置とバルブピンの位置を異ならせると共に溶融樹脂流路
のゲートにバルブピンの先端を交差させてゲートを開閉
するようにしているので、溶融樹脂流路内にバルブピン
が位置しなくて溶融樹脂を滞留させるものがなく、樹脂
の滞留劣化を最小に防ぐことができると共に樹脂の色替
えをするときも良好な色替え特性が得られるものであ
り、また溶融樹脂流路のゲートにバルブピンの先端を交
差させて開閉するようになっているため、短いストロー
クでゲートを確実に開閉できてゲート開閉精度を向上で
きると共にゲートの開閉駆動に要する電力を少電力にで
きるものである。
As described above, according to the present invention, the position of the molten resin flow passage and the position of the valve pin are different from each other, and the gate of the molten resin flow passage is crossed with the tip of the valve pin to open and close the gate. There is no valve pin in the molten resin flow path to retain the molten resin, so that deterioration of resin retention can be prevented to a minimum and good color change characteristics can be obtained when changing the color of the resin. Also, since the tip of the valve pin intersects the gate of the molten resin flow path to open and close, the gate can be opened and closed reliably with a short stroke, which improves gate opening and closing accuracy and is required for gate opening and closing drive. The power can be reduced.

【0021】また本発明の請求項2記載の発明にあって
は、バルブピンを回転させながらゲートを閉じるように
してあるので、バルブピンの片減り摩耗を防止できるも
のである。また本発明の請求項3記載の発明にあって
は、ゲート開閉駆動手段を備えたチップを成形金型の固
定型板と射出成形機の射出シリンダとの間に配置し、ゲ
ート開閉駆動手段を備えたチップを射出シリンダ側に固
定すると共にチップの先端を固定型板に当接してあるの
で、成形金型にゲート開閉装置を組み込むもののように
各成形金型にゲート開閉装置を要せず、射出シリンダ側
に設けたゲート開閉装置を複数種の成形金型に共用でき
るものである。
According to the second aspect of the present invention, since the gate is closed while rotating the valve pin, uneven wear of the valve pin can be prevented. In the invention according to claim 3 of the present invention, the chip having the gate opening / closing driving means is arranged between the fixed mold plate of the molding die and the injection cylinder of the injection molding machine, and the gate opening / closing driving means is provided. Since the tip provided is fixed to the injection cylinder side and the tip of the tip is abutted against the fixed mold plate, there is no need for a gate opening / closing device for each molding die as in the case of incorporating a gate opening / closing device in the molding die, The gate opening / closing device provided on the injection cylinder side can be shared by a plurality of types of molding dies.

【0022】また本発明の請求項4記載の発明にあって
は、ゲート開閉駆動手段を備えたチップを成形金型内に
配置してあるので、成形金型にゲート開閉装置を組み込
んで小型化が図れるものである。また本発明の請求項5
記載の発明にあっては、成形金型内に複数個のチップを
配置し、各チップのバルブピンをピンプレートに固定
し、ゲート開閉駆動手段で複数個のバルブピンを同時に
駆動してゲートを開閉するようにしてあるので、複数の
バルブピンを1台の電動モータで制御できるものであ
り、しかも複数のゲートの調整が不要であると共にゲー
ト開閉のばらつきがないものである。
Further, in the invention according to claim 4 of the present invention, since the chip having the gate opening / closing driving means is arranged in the molding die, the gate opening / closing device is incorporated in the molding die to reduce the size. Can be achieved. In addition, claim 5 of the present invention
In the invention described above, a plurality of chips are arranged in the molding die, the valve pins of each chip are fixed to the pin plate, and the gate opening / closing driving means simultaneously drives the plurality of valve pins to open / close the gate. As a result, a plurality of valve pins can be controlled by a single electric motor, and adjustment of a plurality of gates is unnecessary and there is no variation in gate opening / closing.

【0023】また本発明の請求項6記載の発明にあって
は、成形金型に円形のマニホールドを設け、円形のマニ
ホールドから放射状に広がるように複数本のチップを配
置すると共にマニホールドの流路を各チップの溶融樹脂
流路に連通させているので、マニホールドを介して樹脂
を供給するものでも流路を最短にでき、複数個同時成形
に最適である。
Further, in the invention according to claim 6 of the present invention, a circular manifold is provided in the molding die, a plurality of chips are arranged so as to spread radially from the circular manifold, and a channel of the manifold is formed. Since it is connected to the molten resin flow path of each chip, even if the resin is supplied through the manifold, the flow path can be minimized, which is optimal for simultaneous molding of a plurality of chips.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の一実施例の成形金型の断面図である。FIG. 1 is a cross-sectional view of a molding die according to an embodiment of the present invention.

【図2】同上の射出成形装置を示す一部切欠正面図であ
る。
FIG. 2 is a partially cutaway front view showing the above injection molding apparatus.

【図3】(a)は同上のチップ部分の断面図、(b)は
チップ部分の他例を示す断面図である。
FIG. 3A is a sectional view of a tip portion of the above, and FIG. 3B is a sectional view showing another example of the tip portion.

【図4】同上のバルブピンを駆動する機構を説明する断
面図である。
FIG. 4 is a cross-sectional view illustrating a mechanism for driving the valve pin of the above.

【図5】図4とは異なる例を示し、(a)は断面図、
(b)は分解断面図、(c)はベベルギヤの側面図であ
る。
5 shows an example different from FIG. 4, (a) is a sectional view,
(B) is an exploded sectional view and (c) is a side view of the bevel gear.

【図6】同上の固定側金型を示す断面図である。FIG. 6 is a cross-sectional view showing a fixed-side mold of the above.

【図7】同上の他の実施例の固定側金型を示す断面図で
ある。
FIG. 7 is a cross-sectional view showing a stationary mold according to another embodiment of the above.

【図8】(a)は同上の他の実施例の固定側金型を示す
断面図、(b)は(a)の流路を説明する説明図、
(c)は比較例の流路を説明する説明図である。
FIG. 8A is a cross-sectional view showing a fixed-side mold of another embodiment of the same, FIG. 8B is an explanatory view illustrating a flow path of FIG. 8A,
(C) is explanatory drawing explaining the flow path of a comparative example.

【図9】同上の他の実施例の成形金型装置を示す一部切
欠正面図である。
FIG. 9 is a partially cutaway front view showing a molding die apparatus according to another embodiment of the same.

【図10】同上の成形金型を示す断面図である。FIG. 10 is a cross-sectional view showing the same molding die as the above.

【図11】同上の要部を示す断面図である。FIG. 11 is a cross-sectional view showing a main part of the above.

【図12】従来例の断面図である。FIG. 12 is a sectional view of a conventional example.

【符号の説明】[Explanation of symbols]

1 チップ 2 溶融樹脂流路 3 バルブピン 4 ゲート 5 電動モータ 6 固定型板 7 射出シリンダ 8 ピンプレート 9 マニホールド 1 Chip 2 Molten Resin Flow Path 3 Valve Pin 4 Gate 5 Electric Motor 6 Fixed Mold Plate 7 Injection Cylinder 8 Pin Plate 9 Manifold

Claims (6)

【特許請求の範囲】[Claims] 【請求項1】 ホットランナーを構成するチップに溶融
樹脂流路と溶融樹脂流路の先端のゲートを開閉するバル
ブピンとを設け、溶融樹脂流路の位置とバルブピンの位
置を異ならせると共に溶融樹脂流路のゲートにバルブピ
ンの先端を交差させてゲートを開閉するようにし、電動
モータを有するゲート開閉駆動手段でバルブピンを駆動
するようにして成ることを特徴とする成形金型のホット
ランナーのゲートの開閉装置。
1. A chip constituting a hot runner is provided with a molten resin flow path and a valve pin for opening and closing a gate at the tip of the molten resin flow path, the position of the molten resin flow path and the position of the valve pin are made different, and a molten resin flow is provided. The opening and closing of the gate of the hot runner of the molding die, characterized in that the gate of the road crosses the tip of the valve pin to open and close the gate, and the valve opening and closing drive means having an electric motor drives the valve pin. apparatus.
【請求項2】 バルブピンを回転させながらゲートを閉
じるようにして成ることを特徴とする請求項1記載の成
形金型のホットランナーのゲートの開閉装置。
2. The opening / closing device for the gate of the hot runner of the molding die according to claim 1, wherein the gate is closed while rotating the valve pin.
【請求項3】 ゲート開閉駆動手段を備えたチップを成
形金型の固定型板と射出成形機の射出シリンダとの間に
配置し、ゲート開閉駆動手段を備えたチップを射出シリ
ンダ側に固定すると共にチップの先端を固定型板に当接
して成ることを特徴とする請求項1記載の成形金型のホ
ットランナーのゲートの開閉装置。
3. A chip having gate opening / closing driving means is arranged between a fixed mold plate of a molding die and an injection cylinder of an injection molding machine, and the chip having gate opening / closing driving means is fixed to the injection cylinder side. The opening / closing device for the gate of the hot runner of the molding die according to claim 1, characterized in that the tip of the chip is in contact with a fixed mold plate.
【請求項4】 ゲート開閉駆動手段を備えたチップを成
形金型内に配置して成ることを特徴とする請求項1記載
の成形金型のホットランナーのゲートの開閉装置。
4. An opening / closing device for a hot runner gate of a molding die according to claim 1, wherein a chip having a gate opening / closing driving means is arranged in the molding die.
【請求項5】 成形金型内に複数個のチップを配置し、
各チップのバルブピンをピンプレートに固定し、ゲート
開閉駆動手段で複数個のバルブピンを同時に駆動してゲ
ートを開閉するようにして成ることを特徴とする請求項
4記載の成形金型のホットランナーのゲートの開閉装
置。
5. Arranging a plurality of chips in a molding die,
5. A hot runner for a molding die according to claim 4, wherein the valve pin of each chip is fixed to a pin plate, and a plurality of valve pins are simultaneously driven by the gate opening / closing driving means to open / close the gate. Gate opening and closing device.
【請求項6】 成形金型に円形のマニホールドを設け、
円形のマニホールドから放射状に広がるように複数本の
チップを配置すると共にマニホールドの流路を各チップ
の溶融樹脂流路に連通させて成ることを特徴とする請求
項4記載の成形金型のホットランナーのゲートの開閉装
置。
6. A circular manifold is provided on a molding die,
5. A hot runner for a molding die according to claim 4, wherein a plurality of chips are arranged so as to spread radially from a circular manifold, and the channels of the manifold are communicated with the molten resin channels of each chip. Gate opening and closing device.
JP5295040A 1993-11-25 1993-11-25 Mold opening / closing device for hot runner gate Expired - Fee Related JP2908971B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5295040A JP2908971B2 (en) 1993-11-25 1993-11-25 Mold opening / closing device for hot runner gate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5295040A JP2908971B2 (en) 1993-11-25 1993-11-25 Mold opening / closing device for hot runner gate

Publications (2)

Publication Number Publication Date
JPH07144347A true JPH07144347A (en) 1995-06-06
JP2908971B2 JP2908971B2 (en) 1999-06-23

Family

ID=17815548

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5295040A Expired - Fee Related JP2908971B2 (en) 1993-11-25 1993-11-25 Mold opening / closing device for hot runner gate

Country Status (1)

Country Link
JP (1) JP2908971B2 (en)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09123227A (en) * 1995-11-07 1997-05-13 Cam:Kk Valve gate type hot-runner structure
JPH09193208A (en) * 1996-01-17 1997-07-29 Meisei Kinzoku Kogyosho:Kk Extension nozzleless molding machine for family runnerless mold
KR100526024B1 (en) * 2002-03-18 2005-11-08 허남욱 Hot Runner Valve Nozzle for molding plastics having multiple vertical grooves
WO2007115969A1 (en) * 2006-03-29 2007-10-18 Ewikon Heisskanalsysteme Gmbh & Co. Kg Needle valve nozzle
JP2010508168A (en) * 2006-08-18 2010-03-18 エヴィコン ハイスカナールジステーメ ゲーエムベーハー ウント ツェーオー. カーゲー Needle valve nozzle
JP2010110980A (en) * 2008-11-06 2010-05-20 Fuiisa Kk Flow control valve in multi-point gate injection molding process, injection molding machine and injection molding method
USRE41648E1 (en) 2002-03-14 2010-09-07 Mold-Masters (2007) Limited Valve-gated injection molding system with side-mounted actuator
WO2010127965A2 (en) * 2009-05-06 2010-11-11 Ewikon Heisskanalsysteme Gmbh & Co. Kg Hot nozzle for lateral spraying
WO2010126330A3 (en) * 2009-04-30 2011-03-17 Kim Hyuk Joong Hot runner valve apparatus for an injection molder
JP2014008782A (en) * 2012-06-28 2014-01-20 Inglass Spa Injection molding device for plastic material
WO2014036663A1 (en) * 2012-09-04 2014-03-13 Schöttli AG Hot runner nozzle for injecting thermoplastic material into a moulding tool
JP2016078430A (en) * 2014-10-15 2016-05-16 イングラス ソシエタ ペル アチオニINGLASS S.p.A. Apparatus for injection molding of plastic material
US9498909B2 (en) 2011-11-23 2016-11-22 Synventive Molding Solutions, Inc. Injection molding flow control apparatus and method
JP2017505248A (en) * 2014-02-06 2017-02-16 ユド カンパニー リミテッドYudo Co.,Ltd Valve control device for injection molding machine

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Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09123227A (en) * 1995-11-07 1997-05-13 Cam:Kk Valve gate type hot-runner structure
JPH09193208A (en) * 1996-01-17 1997-07-29 Meisei Kinzoku Kogyosho:Kk Extension nozzleless molding machine for family runnerless mold
USRE41648E1 (en) 2002-03-14 2010-09-07 Mold-Masters (2007) Limited Valve-gated injection molding system with side-mounted actuator
KR100526024B1 (en) * 2002-03-18 2005-11-08 허남욱 Hot Runner Valve Nozzle for molding plastics having multiple vertical grooves
WO2007115969A1 (en) * 2006-03-29 2007-10-18 Ewikon Heisskanalsysteme Gmbh & Co. Kg Needle valve nozzle
US7824176B2 (en) 2006-03-29 2010-11-02 Ewikon Heisskanalsysteme Gmbh & Co. Kg Needle valve nozzle
JP2010508168A (en) * 2006-08-18 2010-03-18 エヴィコン ハイスカナールジステーメ ゲーエムベーハー ウント ツェーオー. カーゲー Needle valve nozzle
JP2010110980A (en) * 2008-11-06 2010-05-20 Fuiisa Kk Flow control valve in multi-point gate injection molding process, injection molding machine and injection molding method
WO2010126330A3 (en) * 2009-04-30 2011-03-17 Kim Hyuk Joong Hot runner valve apparatus for an injection molder
WO2010127965A2 (en) * 2009-05-06 2010-11-11 Ewikon Heisskanalsysteme Gmbh & Co. Kg Hot nozzle for lateral spraying
JP2012525997A (en) * 2009-05-06 2012-10-25 エヴィコン ハイスカナールジステーメ ゲーエムベーハー Hot nozzle for side injection
US8899963B2 (en) 2009-05-06 2014-12-02 Ewikon Heisskanalsysteme Gmbh Hot nozzle for lateral spraying
WO2010127965A3 (en) * 2009-05-06 2011-01-20 Ewikon Heisskanalsysteme Gmbh & Co. Kg Hot nozzle for lateral spraying
US9878477B2 (en) 2011-11-23 2018-01-30 Synventive Molding Solutions, Inc. Injection molding flow control apparatus and method
US11084196B2 (en) 2011-11-23 2021-08-10 Synventive Molding Solutions, Inc. Injection molding flow control apparatus and method
US10518451B2 (en) 2011-11-23 2019-12-31 Synventive Molding Solutions, Inc. Injection molding flow control apparatus and method
US9498909B2 (en) 2011-11-23 2016-11-22 Synventive Molding Solutions, Inc. Injection molding flow control apparatus and method
JP2014008782A (en) * 2012-06-28 2014-01-20 Inglass Spa Injection molding device for plastic material
US9296141B2 (en) 2012-09-04 2016-03-29 Husky Injection Molding Systems Ltd. Hot runner nozzle for injecting thermoplastic material into a moulding tool
WO2014036663A1 (en) * 2012-09-04 2014-03-13 Schöttli AG Hot runner nozzle for injecting thermoplastic material into a moulding tool
JP2017505248A (en) * 2014-02-06 2017-02-16 ユド カンパニー リミテッドYudo Co.,Ltd Valve control device for injection molding machine
JP2016078430A (en) * 2014-10-15 2016-05-16 イングラス ソシエタ ペル アチオニINGLASS S.p.A. Apparatus for injection molding of plastic material

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