JPH04189525A - Injection molding machine - Google Patents
Injection molding machineInfo
- Publication number
- JPH04189525A JPH04189525A JP31777390A JP31777390A JPH04189525A JP H04189525 A JPH04189525 A JP H04189525A JP 31777390 A JP31777390 A JP 31777390A JP 31777390 A JP31777390 A JP 31777390A JP H04189525 A JPH04189525 A JP H04189525A
- Authority
- JP
- Japan
- Prior art keywords
- hydraulic
- injection
- pressure
- screw
- speed
- 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
- 238000001746 injection moulding Methods 0.000 title claims description 15
- 238000002347 injection Methods 0.000 claims abstract description 55
- 239000007924 injection Substances 0.000 claims abstract description 55
- 238000000034 method Methods 0.000 abstract description 22
- 239000003921 oil Substances 0.000 abstract 3
- 239000010720 hydraulic oil Substances 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 11
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 230000004043 responsiveness Effects 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000007789 sealing Methods 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
- B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
- B29C45/47—Means for plasticising or homogenising the moulding material or forcing it into the mould using screws
- B29C45/50—Axially movable screw
- B29C45/5008—Drive means therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
- B29C45/47—Means for plasticising or homogenising the moulding material or forcing it into the mould using screws
- B29C45/50—Axially movable screw
- B29C45/5008—Drive means therefor
- B29C2045/5068—Drive means therefor mechanical drive means in series with hydraulic drive means for axially movable screw
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〕
本発明はプラスチック成形品を製造するための射出成形
機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 molding machine for manufacturing plastic molded products.
従来、プラスチック射出成形機における封圧機構は射出
シリンダー内のスクリューを射出ユニット部に設けた油
圧機構あるいは電動サーボモータにより駆動前進させ、
射出速度および保圧力を油圧あるいはモータ回転数によ
り制御している。従来の射出成形機における射出ユニッ
ト部の概略図を油圧駆動に関して第４図に、また電動サ
ーボモータ駆動に関して第５図に示す。ここでは樹脂の
可塑化に用いられるスクリュー回転装置は省略した。第
４図に示すように油圧駆動では油圧シリンダー３内への
油の流出入によりスクリュー１を前進させ射出速度、保
圧力を与える。そして、射出速度、保圧力の制御は油圧
源８からの油を油圧サーボ弁９を通して流量および圧力
調整により行っている。一方、第５図に示すように電動
サーボモータ駆動では電動サーボモータ２の回転を歯車
７を通してボールねじ５に伝え、ポールナツト６と連結
したスクリュー１を前進させて射出速度、保圧力を与え
る５そして、射出速度、保圧力の制御は電動サーボモー
タ２の回転数調整により行っている。Conventionally, the sealing mechanism in a plastic injection molding machine drives a screw in the injection cylinder forward by a hydraulic mechanism or an electric servo motor provided in the injection unit.
Injection speed and holding force are controlled by hydraulic pressure or motor rotation speed. A schematic diagram of an injection unit in a conventional injection molding machine is shown in FIG. 4 for hydraulic drive, and FIG. 5 for electric servo motor drive. Here, the screw rotating device used for plasticizing the resin was omitted. As shown in FIG. 4, in hydraulic drive, the screw 1 is advanced by the flow of oil into and out of the hydraulic cylinder 3 to provide injection speed and holding pressure. The injection speed and holding pressure are controlled by adjusting the flow rate and pressure of oil from a hydraulic source 8 through a hydraulic servo valve 9. On the other hand, as shown in FIG. 5, in the electric servo motor drive, the rotation of the electric servo motor 2 is transmitted to the ball screw 5 through the gear 7, and the screw 1 connected to the pole nut 6 is advanced to provide the injection speed and holding force. , injection speed, and holding force are controlled by adjusting the rotation speed of the electric servo motor 2.
これらの射出速度および保圧力制御を油圧機構あるいは
電動サーボモータそれぞれ単独でより正確に行うために
例えば特開昭６１−４３９４１２に記載の方法などが考
案されている。In order to control the injection speed and holding pressure more accurately by using a hydraulic mechanism or an electric servo motor independently, a method such as that described in Japanese Patent Laid-Open No. 61-439412 has been devised.
（発明が解決しようとする課題〕
上記従来技術において、油圧機構による速度制御は油圧
サーボ弁の流量制御により行われるが、この場合フィー
ドバックにより制御を行うため応答が遅れると正確な制
御ができないという欠点があり、また一定制御を行って
も多少の変動が生じるという問題があった。また、電動
サーボモータによる圧力制御もロードセルからの信号に
よるフィードバックにより行われるため応答性が悪いと
いう欠点があり、また射出−保圧切替え時に圧力変動が
生じるという問題があった。(Problems to be Solved by the Invention) In the above conventional technology, speed control by the hydraulic mechanism is performed by controlling the flow rate of a hydraulic servo valve, but in this case, control is performed by feedback, so if the response is delayed, accurate control cannot be achieved. There is also the problem that some fluctuations occur even if constant control is performed.Furthermore, the pressure control by the electric servo motor is also performed by feedback from the signal from the load cell, which has the disadvantage of poor responsiveness. There was a problem in that pressure fluctuations occurred when switching between injection and pressure holding.
このように、油圧機構による速度制御および電動サーボ
モータによる圧力制御にはそれぞれ欠点があり、油圧機
構あるいは電動サーボモータそれぞれ単独では速度制御
および圧力制御の両方を正確に行うことができないとい
う問題があった。As described above, speed control using a hydraulic mechanism and pressure control using an electric servo motor each have their drawbacks, and there is a problem in that it is not possible to accurately control both speed and pressure using either the hydraulic mechanism or the electric servo motor alone. Ta.
本発明は射出ユニット部を電動サーボモータと油圧機構
を組合わせて構成することにより射出速度および保圧力
制御の両方を正確に行うことを目的としており、またこ
れにより高精度なプラスチック成形品を提供することを
目的としている。The present invention aims to accurately control both injection speed and holding pressure by configuring the injection unit by combining an electric servo motor and a hydraulic mechanism, and thereby provide highly accurate plastic molded products. It is intended to.
上記目的を達成するために、射出成形機の射出ユニット
部を電動サーボモータと油圧機構とを組合わせて構成す
ることにより、射出速度を電動サーボモータの回転数調
整で制御し、保圧力を油圧機構による油圧サーボ弁の圧
力調整で制御したものである。In order to achieve the above objective, the injection unit of the injection molding machine is configured by combining an electric servo motor and a hydraulic mechanism, so that the injection speed is controlled by adjusting the rotation speed of the electric servo motor, and the holding force is controlled by the hydraulic mechanism. It is controlled by a mechanism that adjusts the pressure of a hydraulic servo valve.
電動サーボモータは回転数調整による速度・位置制御に
適しており、射出時のスクリュー速度（射出速度）の制
御を正確に行うことができる。Electric servo motors are suitable for speed and position control by adjusting the rotation speed, and can accurately control the screw speed (injection speed) during injection.
また油圧サーボ弁を用いた油圧機構は圧力制御に適して
おり、射出充填後の保圧過程の保圧力制御を応答性よく
正確に行うことができる。In addition, a hydraulic mechanism using a hydraulic servo valve is suitable for pressure control, and can accurately control the holding pressure in the pressure holding process after injection and filling with good responsiveness.
したがって、射出ユニット部を電動サーボモータと油圧
機構を組合わせて構成し、射出速度を電動サーボモータ
で、また保圧力を油圧機構で制御することにより射出・
保圧過程における射出速度および保圧力の両方をそれぞ
れ正確に制御する二とができ、また射出−保圧切替えを
スムーズに行うことができる。Therefore, the injection unit is configured by combining an electric servo motor and a hydraulic mechanism, and the injection speed is controlled by the electric servo motor and the holding force is controlled by the hydraulic mechanism.
It is possible to accurately control both the injection speed and the holding force during the pressure holding process, and it is also possible to smoothly switch between injection and holding pressure.
以下、本発明の実施例について図面を参照しながら説明
する。第１図は本発明の一実施例における射出成形機の
射出ユニット部の概略図を示す。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a schematic diagram of an injection unit portion of an injection molding machine according to an embodiment of the present invention.
ここでは樹脂の可塑化に用いられるスクリュー駆動装置
は省略した。射出ユニット部はスクリュー１、電動サー
ボモータ２．油圧シリンダー３．油圧ピストン４．ボー
ルねじ５．ボールナツト６゜歯車７および連結部品から
構成される。本実施例ではスクリュー１と油圧シリンダ
ー３が連結ルー油圧ピストン４とボールねじ５．ポール
ナツト６、が連結した構造となってい−る。射出過程に
おけるスク、リュー１−の前進は電動サーボモータ２の
一回転を歯車７を通してボールねじ５に伝え、ポールナ
ツト６およびこれに連結した油圧ピストン４を前進させ
る。ここでは、ボールねじ５を回転させて、いるが、ポ
ールナツト６を回転させる構造としてもよい。この時、
油圧シリンダー３内の油の流出を止めることにより、油
圧シリンダー３およびそれに連結したスクリュー１が前
進する。そして。Here, the screw drive device used for plasticizing the resin was omitted. The injection unit consists of a screw 1, an electric servo motor 2. Hydraulic cylinder 3. Hydraulic piston4. Ball screw5. It consists of a ball nut, 6° gear 7, and connecting parts. In this embodiment, a screw 1 and a hydraulic cylinder 3 are connected to a hydraulic piston 4 and a ball screw 5. It has a structure in which pole nuts 6 are connected. The advancement of the screw 1 during the injection process transmits one revolution of the electric servo motor 2 to the ball screw 5 through the gear 7, thereby advancing the pole nut 6 and the hydraulic piston 4 connected thereto. Here, the ball screw 5 is rotated, but a structure in which the pole nut 6 is rotated may also be used. At this time,
By stopping the oil in the hydraulic cylinder 3 from flowing out, the hydraulic cylinder 3 and the screw 1 connected thereto move forward. and.
射出−保圧切替え位置で電動サーボモータ２の回転を止
め、その後の保圧過程では油圧機構つまり油圧シリンダ
ー３への油の流出入により保圧力の調整を行う。保圧力
の制御は油圧源８からの油を油圧サーボ弁９を通して圧
力調整により行う。このように射出過程ではスクリュー
１の前進速度つまり射出速度を電動サーボモータ２の回
転数調整により制御し、保圧過程では保圧力を油圧機構
の圧力調整により制御する。これにより、射出速度およ
び保圧力を正確に制御することができ、また射出−保圧
切替、えをスムーズに行うことができる。The rotation of the electric servo motor 2 is stopped at the injection-pressure-holding switching position, and in the subsequent pressure-holding process, the holding force is adjusted by flowing oil into and out of the hydraulic mechanism, that is, the hydraulic cylinder 3. The holding pressure is controlled by adjusting the pressure of oil from a hydraulic source 8 through a hydraulic servo valve 9. In this way, in the injection process, the forward speed of the screw 1, that is, the injection speed, is controlled by adjusting the rotational speed of the electric servo motor 2, and in the pressure holding process, the holding force is controlled by adjusting the pressure of the hydraulic mechanism. This makes it possible to accurately control the injection speed and holding pressure, and to smoothly switch between injection and holding pressure.
第２図は本発明の第２の実施例を示す射出成形機の射出
ユニット部の概略図である。本実施例ではスクリュー１
７、と油圧ピストン４が連結し、−油圧シリンダ−３と
ボールねじ５．ポールナツト６が連結した構造となって
いる。射出過程におけるスクリュー１の前進は電動サー
ボモータ２の回転を歯車７を通してボールねじ５に伝え
、ポールナツト６お、よびこれに連結した油圧シリンダ
ー３を前進させる。ここでは、ボールねじ５を回転させ
ているが、ボールナツト６を回転させる構造としてもよ
い。この時、油圧シリンダー３内の油の流出を止めるこ
とにより、油圧ピストン４およびそれに連結したスクリ
ュー１が前進する。そして、射出−保圧切替え位置で電
動サーボモータ２の回転を止め、その後の保圧過程では
油圧機構つまり油圧シリンダー３への油の流出入により
保圧力の調整を行う。保圧力の制御は油圧源８からの油
を油圧サーボ弁９を通して圧力調整により行う。このよ
うに射出過程ではスクリュー１の前進速度つまり射出速
度を電動サーボモータ２の回転数調整により制御し、保
圧過程では保圧力を油圧機構の圧力調整により制御する
。FIG. 2 is a schematic diagram of an injection unit section of an injection molding machine showing a second embodiment of the present invention. In this example, screw 1
7, and the hydraulic piston 4 are connected, - the hydraulic cylinder 3 and the ball screw 5. It has a structure in which pole nuts 6 are connected. The advancement of the screw 1 during the injection process transmits the rotation of the electric servo motor 2 to the ball screw 5 through the gear 7, thereby advancing the pole nut 6 and the hydraulic cylinder 3 connected thereto. Although the ball screw 5 is rotated here, a structure in which the ball nut 6 is rotated may also be used. At this time, by stopping the oil in the hydraulic cylinder 3 from flowing out, the hydraulic piston 4 and the screw 1 connected thereto move forward. Then, the rotation of the electric servo motor 2 is stopped at the injection-pressure-holding switching position, and in the subsequent pressure-holding process, the holding force is adjusted by flowing oil into and out of the hydraulic mechanism, that is, the hydraulic cylinder 3. The holding pressure is controlled by adjusting the pressure of oil from a hydraulic source 8 through a hydraulic servo valve 9. In this way, in the injection process, the forward speed of the screw 1, that is, the injection speed, is controlled by adjusting the rotational speed of the electric servo motor 2, and in the pressure holding process, the holding force is controlled by adjusting the pressure of the hydraulic mechanism.
第３図は本発明の第３の実施例を示す射出成形機の射出
ユニット部の概略図である。射出ユニット部はスクリュ
ー１と油圧ピストン４およびボールねじ５．ポールナツ
ト６が連結した構造となっている。そして、ボールねじ
５．ポールナツト６がスライドできるようにその外周部
にスプライン１０が設けられている。射出過程における
スクリュー１の前進は電動サーボモータ２の回転を歯車
７を通してボールねじ５に伝え、ポールナツト６を前進
させることによりこれと連結した油圧ピストン４および
イクリュー１が前進する。ここでは、ボールねじ５を回
転させているが、ポールナツト６を回転させる構造とし
てもよい。この時、油圧シリンダー３内の油はバイパス
状態にしておく。FIG. 3 is a schematic diagram of an injection unit section of an injection molding machine showing a third embodiment of the present invention. The injection unit includes a screw 1, a hydraulic piston 4, and a ball screw 5. It has a structure in which pole nuts 6 are connected. And ball screw 5. A spline 10 is provided on the outer periphery of the pole nut 6 so that it can slide. To advance the screw 1 during the injection process, the rotation of the electric servo motor 2 is transmitted to the ball screw 5 through the gear 7, and by advancing the pole nut 6, the hydraulic piston 4 and the screw 1 connected thereto are advanced. Although the ball screw 5 is rotated here, a structure in which the pole nut 6 is rotated may also be used. At this time, the oil in the hydraulic cylinder 3 is kept in a bypass state.
そして、射出−保圧切替え位置で電動サーボモータ２の
回転を止め、その後の保圧過程では油圧機構つまり油圧
シリンダー３への油の流出入により保圧力の調整を行う
。保圧力の制御は油圧源８からの油を油圧サーボ弁９を
通して圧力調整により行う。この時、油圧機構により圧
力調整を行うと油圧ピストン４およびスクリュー１は前
後し、これに伴いボールねじ５．ポールナツト６がスプ
ライン１０によりスライドする。このように射出過程で
はスクリュー１の前進速度つまり射出速度を電動サーボ
モータ２の回転数調整により制御し、保圧過程では保圧
力を油圧機構の圧力調整により制御する。Then, the rotation of the electric servo motor 2 is stopped at the injection-pressure-holding switching position, and in the subsequent pressure-holding process, the holding force is adjusted by flowing oil into and out of the hydraulic mechanism, that is, the hydraulic cylinder 3. The holding pressure is controlled by adjusting the pressure of oil from a hydraulic source 8 through a hydraulic servo valve 9. At this time, when the pressure is adjusted by the hydraulic mechanism, the hydraulic piston 4 and the screw 1 move back and forth, and accordingly, the ball screw 5. The pole nut 6 slides by the spline 10. In this way, in the injection process, the forward speed of the screw 1, that is, the injection speed, is controlled by adjusting the rotational speed of the electric servo motor 2, and in the pressure holding process, the holding force is controlled by adjusting the pressure of the hydraulic mechanism.
以上、３つの実施例について述べたが、上記したように
射出ユニット部を電動サーボモータと油圧機構を組合わ
せて構成し、射出速度を電動サーボモータで、また保圧
力を油圧機構で制御することにより射出・保圧過程にお
ける射出速度および保圧力の両方をそわぞれ正確に制御
することができ、また射出−保圧切替えをスムーズに行
うことができる。Three embodiments have been described above, but as described above, the injection unit is configured by combining an electric servo motor and a hydraulic mechanism, and the injection speed is controlled by the electric servo motor and the holding force is controlled by the hydraulic mechanism. This makes it possible to accurately control both the injection speed and the holding force during the injection/holding process, and to smoothly switch between injection and holding pressure.
本発明は、プラスチック射出成形機の射出ユニット部を
電動サーボモータと油圧機構との組合せにより構成し、
射出速度を電動サーボモータで、また保圧力を油圧サー
ボで制御したものである。The present invention configures an injection unit of a plastic injection molding machine by a combination of an electric servo motor and a hydraulic mechanism,
The injection speed is controlled by an electric servo motor, and the holding force is controlled by a hydraulic servo.
これにより、射出速度および保圧力を正確に制御でき、
また射出−保圧切替えをスムーズに行うことができる。This allows precise control of injection speed and holding force,
In addition, injection-pressure-holding switching can be performed smoothly.
したがって、この射出成形機は高精密なプラスチック成
形品例えば光ディスク、プラスチックレンズなどの成形
に適している。Therefore, this injection molding machine is suitable for molding highly precise plastic molded products such as optical discs and plastic lenses.
第１図は本発明の第一実施例を示す射出成形機の射出ユ
ニット部の概略図、第２図は本発明の第２実施例を示す
概略図、第３図は本発明の第３実施例を示す概略図、第
４図は従来例における射出成形機の油圧駆動による射出
ユニット部の概略図、第５図は従来例における射出成形
機の電動サーボモータ駆動による射出ユニット部の概略
図である。
１・・・スクリュー、 ２・・・電動サーボモータ
。
３・・・油圧シリンダー、 ４・・・油圧ピストン、５
・・・ボールねじ、 ６・・・ポールナツト、７
・・・歯車、 ８・・・油圧源、９・・・油
圧サーボ弁、 １０・・・スプライン。
集 ／１２１
集 ２ 図
纂 ３ 図
集４− 図Fig. 1 is a schematic diagram of an injection unit section of an injection molding machine showing a first embodiment of the present invention, Fig. 2 is a schematic diagram showing a second embodiment of the invention, and Fig. 3 is a schematic diagram showing a third embodiment of the invention. A schematic diagram showing an example, FIG. 4 is a schematic diagram of a hydraulically driven injection unit of an injection molding machine in a conventional example, and FIG. 5 is a schematic diagram of an injection unit driven by an electric servo motor of an injection molding machine in a conventional example. be. 1...Screw, 2...Electric servo motor. 3... Hydraulic cylinder, 4... Hydraulic piston, 5
...Ball screw, 6...Pole nut, 7
... Gear, 8 ... Hydraulic power source, 9 ... Hydraulic servo valve, 10 ... Spline. Collection /121 Collection 2 Collection of illustrations 3 Collection of illustrations 4- Diagrams
Claims (1)
が電動サーボモータと油圧機構との組合せにより構成さ
れ、射出速度を電動サーボモータで制御し、保圧力を油
圧機構で制御することを特徴とする射出成形機。1. An injection molding machine for plastic injection molding, characterized in that the injection unit is configured by a combination of an electric servo motor and a hydraulic mechanism, the injection speed is controlled by the electric servo motor, and the holding force is controlled by the hydraulic mechanism. Machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2317773A JP2804169B2 (en) | 1990-11-26 | 1990-11-26 | Plastic injection molding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2317773A JP2804169B2 (en) | 1990-11-26 | 1990-11-26 | Plastic injection molding method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04189525A true JPH04189525A (en) | 1992-07-08 |
| JP2804169B2 JP2804169B2 (en) | 1998-09-24 |
Family
ID=18091891
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2317773A Expired - Lifetime JP2804169B2 (en) | 1990-11-26 | 1990-11-26 | Plastic injection molding method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2804169B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0760277A1 (en) * | 1995-09-01 | 1997-03-05 | Ferromatik Milacron Maschinenbau GmbH | Electric drive with hydraulic assist in an injection moulding machine |
| DE10318958B3 (en) * | 2003-04-26 | 2004-08-05 | Krauss-Maffei Kunststofftechnik Gmbh | Hybrid injection unit for an injection molding machine, comprises a rotatable and axially movable plastifying worm in a cylinder, primary and secondary electric motors, and a housing |
| DE102010020573A1 (en) | 2010-05-14 | 2011-11-17 | Netstal-Maschinen Ag | Method for operating a hybrid drive and hybrid drive |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0414421A (en) * | 1990-05-07 | 1992-01-20 | Mitsubishi Heavy Ind Ltd | Injection apparatus of injection molding machine |
-
1990
- 1990-11-26 JP JP2317773A patent/JP2804169B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0414421A (en) * | 1990-05-07 | 1992-01-20 | Mitsubishi Heavy Ind Ltd | Injection apparatus of injection molding machine |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0760277A1 (en) * | 1995-09-01 | 1997-03-05 | Ferromatik Milacron Maschinenbau GmbH | Electric drive with hydraulic assist in an injection moulding machine |
| DE10318958B3 (en) * | 2003-04-26 | 2004-08-05 | Krauss-Maffei Kunststofftechnik Gmbh | Hybrid injection unit for an injection molding machine, comprises a rotatable and axially movable plastifying worm in a cylinder, primary and secondary electric motors, and a housing |
| EP1473134A2 (en) * | 2003-04-26 | 2004-11-03 | Krauss-Maffei Kunststofftechnik GmbH | Hybrid injection unit and injection molding machine with a hybrid injection unit |
| EP1473134A3 (en) * | 2003-04-26 | 2004-12-29 | Krauss-Maffei Kunststofftechnik GmbH | Hybrid injection unit and injection molding machine with a hybrid injection unit |
| US7186111B2 (en) | 2003-04-26 | 2007-03-06 | Krauss-Maffei Kunststofftechnik Gmbh | Hybrid injection unit, and injection molding machine with a hybrid injection unit |
| DE102010020573A1 (en) | 2010-05-14 | 2011-11-17 | Netstal-Maschinen Ag | Method for operating a hybrid drive and hybrid drive |
| JP2013535180A (en) * | 2010-05-14 | 2013-09-09 | ネッツタール マシーネン アクチエンゲゼルシャフト | Method for operating a hybrid drive and hybrid drive |
| US9156199B2 (en) | 2010-05-14 | 2015-10-13 | Netstal-Maschinen Ag | Method for operating a hybrid drive and hybrid drive |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2804169B2 (en) | 1998-09-24 |
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