JPH0639885A - Two motor-type injection apparatus - Google Patents

Two motor-type injection apparatus

Info

Publication number
JPH0639885A
JPH0639885A JP13695493A JP13695493A JPH0639885A JP H0639885 A JPH0639885 A JP H0639885A JP 13695493 A JP13695493 A JP 13695493A JP 13695493 A JP13695493 A JP 13695493A JP H0639885 A JPH0639885 A JP H0639885A
Authority
JP
Japan
Prior art keywords
screw
injection
motor
driving
servo motor
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
JP13695493A
Other languages
Japanese (ja)
Other versions
JPH0673884B2 (en
Inventor
Yasushi Ishikawa
恬 石川
Zenji Inaba
善治 稲葉
Keiichi Harano
慶一 原野
Hiromasa Ootake
弘眞 大竹
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.)
Fanuc Corp
Original Assignee
Fanuc Corp
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 Fanuc Corp filed Critical Fanuc Corp
Priority to JP5136954A priority Critical patent/JPH0673884B2/en
Publication of JPH0639885A publication Critical patent/JPH0639885A/en
Publication of JPH0673884B2 publication Critical patent/JPH0673884B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B29C45/46Means for plasticising or homogenising the moulding material or forcing it into the mould
    • B29C45/47Means for plasticising or homogenising the moulding material or forcing it into the mould using screws
    • B29C45/50Axially movable screw
    • B29C45/5008Drive means therefor

Landscapes

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

Abstract

PURPOSE:To perform all of injection, metering and kneading and control of back pressure by using motors. CONSTITUTION:A screw is rotatably driven through a transmission mechanism by means of a motor M1 being exclusively used for rotation of the screw. In addition, a servo motor M2 being exclusively used for driving straightly the screw having a position detector for driving the screw in the axial direction through a switching mechanism for switching rotational movement and straight movement from one to another and from another to one, is provided. During metering and kneading, the screw is rotated by means of the motor M1 being exclusively used for rotation of the screw and the screw is driven in the axial direction by driving the servo motor M2 being exclusively used for driving straightly the screw to give a back pressure. A metering point is detected by the rotational position or the servomotor M2 detected by the above described position detector. In addition, during injection, the screw is forwarded by driving the servo motor M2 to perform injection.

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、電動機で駆動される射
出成形機に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an injection molding machine driven by an electric motor.

【0002】[0002]

【従来の技術】スクリュー式射出の射出成形機において
は、計量時、スクリューを回転させ、スクリューの剪断
作用とヒータによる加熱により成形材料を溶融,混練
し、加熱シリンダ先端部に溶融材料が貯えられるにつれ
て、その材料の溶融圧力によってスクリューは該スクリ
ューに加えられた背圧に打ち勝ち、後方に押し戻され、
その押し戻されたスクリュー位置をリミットスイッチ等
で検出し射出量を決めている(計量)。その後、スクリ
ューを前進させて溶融材料を射出する。
2. Description of the Related Art In a screw type injection molding machine, a screw is rotated at the time of measurement, and the molding material is melted and kneaded by the shearing action of the screw and the heating by a heater, and the molten material is stored at the tip of the heating cylinder. As a result, the melting pressure of the material causes the screw to overcome the back pressure exerted on the screw and push it back.
The amount of injection is determined by measuring the pushed back screw position with a limit switch, etc. (measurement). Then, the screw is advanced to inject the molten material.

【0003】従来の射出成形機においては、駆動源に油
圧を用いることが主であった。油圧を用いると、油圧の
駆動源や油圧制御のための弁等を必要とし、エネルギー
的にも制御の行い易さの点からも不便であった。
In the conventional injection molding machine, the hydraulic pressure was mainly used as a drive source. The use of hydraulic pressure requires a hydraulic drive source, a valve for hydraulic control, and the like, which is inconvenient in terms of energy and ease of control.

【0004】また、駆動源にサーボモータを使用し、ス
クリュー回転機構、スクリューを軸方向に駆動し射出さ
せる射出機構、さらには、型締機構と上記サーボモータ
とをクラッチ機構を介して選択的に接続し、スクリュー
回転、射出、型締を選択的に実行する射出成形機も特開
昭58−179631号公報で公知になっている。
Further, a servo motor is used as a drive source, a screw rotating mechanism, an injection mechanism for axially driving and ejecting the screw, and a mold clamping mechanism and the servo motor are selectively operated via a clutch mechanism. An injection molding machine, which is connected and selectively executes screw rotation, injection, and mold clamping, is also known from Japanese Patent Laid-Open No. 58-179631.

【0005】計量・混練時には、スクリューを回転させ
ると共に、樹脂の溶融圧力によって後退するスクリュー
に対して、所定背圧を付与する必要があるが、上記特開
昭58−179631号公報に記載された発明では、該
背圧の付与をブレーキ装置によって行っている。
At the time of metering and kneading, it is necessary to rotate the screw and to apply a predetermined back pressure to the screw retreating due to the melting pressure of the resin, which is described in JP-A-58-179631. In the invention, the back pressure is applied by the brake device.

【0006】[0006]

【発明が解決しようとする課題】そこで、本発明の目的
は、射出、計量・混練、背圧の制御をすべてモータによ
って行う2モータ式射出装置を提供することにある。
SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a two-motor type injection device in which injection, metering / kneading, and back pressure control are all controlled by a motor.

【0007】[0007]

【課題を解決するための手段】本発明は、伝動機構を介
してスクリューを回転させるスクリュー回転専用のモー
タと、回転運動と直線運動を一方から他方へ及び他方か
ら一方へ変換する変換機構を介してスクリューを軸方向
に駆動する位置検出器を有するスクリュー直線駆動専用
のサーボモータとの2つのモータを備えることによって
上記課題を解決した。
According to the present invention, there is provided a screw rotation exclusive motor for rotating a screw through a transmission mechanism, and a conversion mechanism for converting rotational motion and linear motion from one side to the other side and from the other side to the other side. The above problem is solved by providing two motors, a servo motor dedicated to screw linear drive having a position detector that drives the screw in the axial direction.

【0008】[0008]

【作用】計量・混練時にはスクリュー回転専用のモータ
を駆動してスクリューを回転させる。スクリューの回転
により、樹脂材料が溶融し、溶融圧力が発生し、スクリ
ューを後退させるが、スクリュー直線駆動専用のサーボ
モータを駆動し、スクリューを軸方向に駆動して樹脂に
所定背圧を与え、混練を行う。スクリューが後退し、ス
クリュー直線駆動専用のサーボモータが回転し、この回
転位置を位置検出器で検出し、設定計量点に達すると、
計量混練工程を終了する。一方、射出時には、スクリュ
ー直線駆動専用のサーボモータを駆動してスクリューを
前進させて射出を行う。
[Function] When measuring and kneading, the screw rotation motor is driven to rotate the screw. By rotating the screw, the resin material is melted, a melting pressure is generated, and the screw is retracted, but a servo motor dedicated for screw linear drive is driven, and the screw is axially driven to give a predetermined back pressure to the resin, Knead. The screw retracts, the servo motor dedicated to the screw linear drive rotates, this rotational position is detected by the position detector, and when the set weighing point is reached,
The measuring and kneading step is completed. On the other hand, at the time of injection, the servo motor dedicated to screw linear drive is driven to advance the screw to perform injection.

【0009】[0009]

【実施例】図1は、本発明を実施する射出成形機の射出
機構の一実施例の一部断面側面図で、図2は、図1の右
側面図である。1はスクリュー軸で、該軸1の先端は加
熱シリンダ2内に内装されたスクリューを形成し、後部
はスラスト軸受部3を介して、プッシャープレート4に
回転自在に固定されている。また、該スクリュー軸1の
後端はスプライン結合5,歯車6,10を介してスクリ
ューを回転させるスクリュー回転用サーボモータM1の
モータ軸14に連結されている。プッシャープレート4
は2つのボールスクリュー8,8´と各々螺合するナッ
ト7,7´が固着され、上記2つのボールスクリュー
8,8´は歯車9,9´及び歯車11を介して、スクリ
ューを軸方向に駆動する射出用サーボモータM2のモー
タ軸15に連結されている。すなわち、スクリュー回転
用サーボモータM1はスクリューを回転させるための専
用のモータであり、射出用サーボモータM2はスクリュ
ーを軸方向に駆動するスクリュー直線駆動専用のモータ
である。
1 is a partial cross-sectional side view of an embodiment of an injection mechanism of an injection molding machine embodying the present invention, and FIG. 2 is a right side view of FIG. Reference numeral 1 denotes a screw shaft, the front end of which forms a screw incorporated in a heating cylinder 2, and the rear part is rotatably fixed to a pusher plate 4 via a thrust bearing portion 3. The rear end of the screw shaft 1 is connected to a motor shaft 14 of a screw rotation servomotor M1 for rotating the screw via a spline coupling 5, gears 6, 10. Pusher plate 4
Are fixed with nuts 7 and 7'which are respectively screwed into two ball screws 8 and 8 ', and the two ball screws 8 and 8'through the gears 9 and 9'and the gear 11 are used to axially move the screws. It is connected to the motor shaft 15 of the driving injection servomotor M2. That is, the screw rotation servomotor M1 is a dedicated motor for rotating the screw, and the injection servomotor M2 is a dedicated screw linear drive motor for driving the screw in the axial direction.

【0010】上述した構成によって、スクリューの回転
による計量工程の動作は、スクリュー回転用サーボモー
タM1の回転により歯車10,6が回転され、スプライ
ン結合5を介してスクリュー軸1は回転し、成形材料を
溶融し、その溶融によってスクリューを後退(図1右
方)させようとする力が生じるが、この力はスクリュー
軸1,プッシャープレート4,ナット7,7´に印加さ
れ、スクリュー直線駆動専用の射出用サーボモータM2
により加えられた背圧以上になったときボールスクリュ
ー8,8´は射出時とは逆回転して、スクリューを後退
させることとなる。こうして、スクリューが計量点まで
後退し計量が完了すると、スクリュー回転用サーボモー
タM1の駆動を止め、次に射出を行うが、これは射出用
サーボモータM2を駆動し、歯車9,9´を介してボー
ルスクリュー8,8´を回転させる。ボールスクリュー
8,8´の回転により、該ボールスクリュー8,8´と
螺合しているナット7,7´は前進し、上述したような
構成により、該ナット7,7´に固着されたプッシャー
プレート4は前進し、スクリュー軸1をスラスト軸受部
3を介して前進させ、射出を行うものである。
With the above-described structure, in the operation of the metering process by the rotation of the screw, the gears 10 and 6 are rotated by the rotation of the screw rotation servomotor M1, the screw shaft 1 is rotated through the spline coupling 5, and the molding material is formed. Is generated, and a force to move the screw backward (to the right in FIG. 1) is generated by the melting, but this force is applied to the screw shaft 1, pusher plate 4, nuts 7 and 7 ', and is dedicated to screw linear drive. Injection servo motor M2
When the back pressure applied by is exceeded, the ball screws 8 and 8'reversely rotate at the time of injection and the screws are retracted. In this way, when the screw retreats to the measuring point and the measurement is completed, the driving of the screw rotation servomotor M1 is stopped and the injection is performed next. This drives the injection servomotor M2 and the gears 9 and 9'are used. To rotate the ball screws 8 and 8 '. By the rotation of the ball screws 8 and 8 ′, the nuts 7 and 7 ′ screwed with the ball screws 8 and 8 ′ move forward, and the pushers fixed to the nuts 7 and 7 ′ are configured as described above. The plate 4 is moved forward, the screw shaft 1 is moved forward via the thrust bearing portion 3, and injection is performed.

【0011】上記計量(混練),射出動作の制御を行う
制御部のブロック図を図3に示す。
FIG. 3 is a block diagram of a control unit for controlling the above-mentioned weighing (kneading) and injection operation.

【0012】制御装置20は中央処理装置(以下CPU
という)21、全体制御のプログラムを記憶するROM
22、演算等のためのRAM23、出力回路24、入力
回路25を有し、26は後述する背圧,計量点,スクリ
ュー回転用のサーボモータの回転数等のパラメータを設
定するための手操作入力装置で、27はバスである。上
記出力回路24にはサーボモータM1,M2を駆動し速
度制御を行うサーボ駆動速度制御装置28,29が結合
されている。30,31はサーボモータM1,M2への
駆動電流を検出する電流検出計で、該電流検出計30,
31の出力はA/Dコンバータ32,33を介してデジ
タル信号にされ入力回路25に入力されている。P1,
P2はサーボモータM1,M2の速度,位置を検出する
パルスコーダで、該パルスコーダP1,P2の出力はサ
ーボ駆動速度制御装置28,29に入力され、かつ、射
出用サーボモータM2のパルスコーダP2の出力は入力
回路25にも入力されている。
The control unit 20 is a central processing unit (hereinafter CPU).
21), ROM that stores the program for overall control
22, a RAM 23 for calculation, an output circuit 24, and an input circuit 25, and 26 is a manual operation input for setting parameters such as a back pressure, a measuring point, and a rotation speed of a servo motor for screw rotation, which will be described later. The device 27 is a bus. Servo drive speed control devices 28 and 29 for driving the servo motors M1 and M2 to control the speed are coupled to the output circuit 24. Reference numerals 30 and 31 are current detectors for detecting drive currents to the servomotors M1 and M2.
The output of 31 is converted into a digital signal via the A / D converters 32 and 33 and input to the input circuit 25. P1,
P2 is a pulse coder that detects the speed and position of the servomotors M1 and M2. The outputs of the pulse coder P1 and P2 are input to the servo drive speed controllers 28 and 29, and the output of the pulse coder P2 of the injection servomotor M2 is It is also input to the input circuit 25.

【0013】上述したような構成によって、本発明の一
実施例を図4の動作処理フローと共に説明する。射出が
終了し、計量(混練)行程に入ると、CPU21は、ま
ず、射出用サーボモータM2へ設定背圧に応じた一定電
流を流し、スクリューを前進(図1左方)させる方向に
射出用サーボモータM2を回転させるようにする(ステ
ップS1)。そして、スクリュー回転用サーボモータM
1を駆動させ、歯車10,6,スプライン結合部5を介
してスクリュー軸1を回転させ、混練を開始すると共に
計量点を検出するためのカウンタをリセットする(ステ
ップS2)。その結果、成形材料(樹脂)は混練され、
溶融し、スクリューを後退させようとする反力が生じ、
その反力が射出用サーボモータM2によってスクリュー
を前進させようとする力に打ち勝ち、スクリュー軸1が
後退し、プッシャープレート4,ナット7,7´を後退
させる。そのため、ボールスクリュー8,8´は回転
し、歯車9,9´,11を介して射出用サーボモータM
2は駆動方向とは反対方向にスリップして回転すること
となる。このように、スクリューに印加する背圧は射出
用サーボモータM2に印加する一定電流によって制御す
ることとなる。射出用サーボモータM2がスリップし回
転すると、該射出用サーボモータM2に設けられたパル
スコーダP2からパルスが発生し、このパルスが入力回
路25を介して入力されるから、このパルスをカウンタ
で計数し、手操作入力装置を介して設定された設定値、
即ち、計量点に達するまでスクリュー回転用サーボモー
タM1を駆動し続ける(ステップS2,S3)。そし
て、設定された計量点に達するとスクリュー回転用サー
ボモータM1の駆動を停止し、計量すなわち混練は終了
する(ステップS4)。このように背圧を印加するには
スクリューを前進させるスクリュー直線駆動専用の射出
用サーボモータM2に一定電流を印加するのみでよいか
ら、背圧の印加が簡単で、また、印加する一定電流の値
を手操作入力装置26から任意の値に設定できるから、
成形材料に応じて適正な背圧を加えることができる。
An embodiment of the present invention having the above-described structure will be described with reference to the operation processing flow of FIG. When the injection is finished and the metering (kneading) process is started, the CPU 21 first applies a constant current corresponding to the set back pressure to the injection servomotor M2 to inject the screw in the direction of moving forward (left in FIG. 1). The servo motor M2 is rotated (step S1). And a servo motor M for screw rotation
1 is driven and the screw shaft 1 is rotated through the gears 10, 6 and the spline coupling portion 5 to start kneading and reset a counter for detecting a measuring point (step S2). As a result, the molding material (resin) is kneaded,
The reaction force that melts and tries to retract the screw occurs,
The reaction force overcomes the force to move the screw forward by the injection servomotor M2, the screw shaft 1 retracts, and the pusher plate 4, nuts 7, 7'retract. Therefore, the ball screws 8 and 8'rotate, and the injection servomotor M is driven via the gears 9, 9'and 11.
2 slips and rotates in the direction opposite to the driving direction. In this way, the back pressure applied to the screw is controlled by the constant current applied to the injection servomotor M2. When the injection servomotor M2 slips and rotates, a pulse is generated from the pulse coder P2 provided in the injection servomotor M2, and this pulse is input through the input circuit 25. Therefore, this pulse is counted by the counter. , Set value set via the manual input device,
That is, the screw rotation servomotor M1 is continuously driven until the measurement point is reached (steps S2 and S3). When the set weighing point is reached, the driving of the screw rotation servomotor M1 is stopped, and the weighing, that is, the kneading is completed (step S4). In order to apply the back pressure in this way, it is only necessary to apply a constant current to the injection servomotor M2 for screw linear drive that moves the screw forward. Since the value can be set to any value from the manual operation input device 26,
Appropriate back pressure can be applied according to the molding material.

【0014】[0014]

【発明の効果】本発明はスクリューを回転させるスクリ
ュー回転専用のモータと、スクリューを軸方向に駆動す
るスクリュー直線駆動専用のモータをそれぞれ独立に設
け、しかも、少なくともスクリューを軸方向に駆動する
スクリュー直線駆動専用の射出用モータをサーボモータ
としたことによって、射出時には、上記スクリュー直線
駆動専用のサーボモータのみを駆動してスクリューを軸
方向に移動させて射出を行い、計量・混練時には、スク
リュー回転専用のモータを駆動してスクリューを回転さ
せると共に、スクリュー直線駆動専用のサーボモータを
駆動して背圧を付与するようにしたから、1つのサーボ
モータによって射出と背圧の制御を行うことができ、経
済的で、かつ、効率的である。また、スクリュー直線駆
動専用のモータをサーボモータとし、位置検出器を該モ
ータに取付けたから、この位置検出器によってスクリュ
ーの位置を検出することができ、計量点の設定や検出が
容易となる。
According to the present invention, a motor for exclusive use of screw rotation for rotating a screw and a motor for exclusive use of screw linear drive for axially driving the screw are independently provided, and at least a screw linear for linearly driving the screw is provided. By using the servo motor as the injection motor dedicated for driving, only the servo motor dedicated for screw linear drive is driven at the time of injection to move the screw in the axial direction for injection, and screw rotation is exclusively used for weighing and kneading. Since the motor is driven to rotate the screw and the servo motor dedicated to the screw linear drive is driven to apply back pressure, injection and back pressure can be controlled by one servo motor. It is economical and efficient. Further, since the motor dedicated to the screw linear drive is a servo motor and the position detector is attached to the motor, the position of the screw can be detected by this position detector, which facilitates setting and detection of the measuring point.

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

【図1】本発明を実施する射出成形機の射出機構の一実
施例の一部断面側面図。
FIG. 1 is a partial cross-sectional side view of an embodiment of an injection mechanism of an injection molding machine embodying the present invention.

【図2】図1の右側面図。FIG. 2 is a right side view of FIG.

【図3】本発明を実施する一実施例の制御部のブロック
図。
FIG. 3 is a block diagram of a control unit according to an embodiment for carrying out the present invention.

【図4】本発明の一実施例の動作フロー。FIG. 4 is an operation flow of an embodiment of the present invention.

【符号の説明】[Explanation of symbols]

1 スクリュー軸 2 シリンダ 4 プッシャープレート 7,7´ ナット 8,8´ ボールスクリュー 6,9,9´,10,11 歯車 M1,M2 サーボモータ P1,P2 パルスコーダ 30,31 電流検出計 32,33 A/Dコンバータ 1 Screw shaft 2 Cylinder 4 Pusher plate 7,7 'Nut 8,8' Ball screw 6,9,9 ', 10,11 Gear M1, M2 Servomotor P1, P2 Pulse coder 30,31 Current detector 32,33 A / D converter

───────────────────────────────────────────────────── フロントページの続き (72)発明者 原野 慶一 東京都日野市旭が丘3丁目5番地1 ファ ナック株式会社内 (72)発明者 大竹 弘眞 東京都日野市旭が丘3丁目5番地1 ファ ナック株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Keiichi Harano, 3-5 Asahigaoka, Hino City, Tokyo 1-5 FANUC Co., Ltd. (72) Hiromasa Ohtake, 3-5 Asahigaoka, Hino-shi, Tokyo 1 FANUC CORPORATION In the company

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 電動式射出成形機において、伝動機構を
介してスクリューを回転させるスクリュー回転専用のモ
ータと、回転運動と直線運動を一方から他方へ及び他方
から一方へ変換する変換機構を介してスクリューを軸方
向に駆動するスクリュー直線駆動専用のサーボモータ
と、該スクリュー直線駆動専用のサーボモータの回転位
置を検出する位置検出器とを備えたことを特徴とする2
モータ射出装置。
1. In an electric injection molding machine, a screw rotation dedicated motor for rotating a screw through a transmission mechanism and a conversion mechanism for converting rotational motion and linear motion from one to the other and from the other to the one A servo motor dedicated to screw linear drive for driving the screw in the axial direction, and a position detector for detecting the rotational position of the servo motor dedicated to screw linear drive are provided.
Motor injection device.
JP5136954A 1993-05-17 1993-05-17 2-motor injection device Expired - Lifetime JPH0673884B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5136954A JPH0673884B2 (en) 1993-05-17 1993-05-17 2-motor injection device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5136954A JPH0673884B2 (en) 1993-05-17 1993-05-17 2-motor injection device

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP3163335A Division JPH0671750B2 (en) 1991-06-10 1991-06-10 Electric injection molding machine

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP9011802A Division JP2834444B2 (en) 1997-01-06 1997-01-06 Electric injection molding machine

Publications (2)

Publication Number Publication Date
JPH0639885A true JPH0639885A (en) 1994-02-15
JPH0673884B2 JPH0673884B2 (en) 1994-09-21

Family

ID=15187394

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5136954A Expired - Lifetime JPH0673884B2 (en) 1993-05-17 1993-05-17 2-motor injection device

Country Status (1)

Country Link
JP (1) JPH0673884B2 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5862030A (en) * 1981-10-08 1983-04-13 Nissei Plastics Ind Co Injection molder
JPS60174623A (en) * 1984-02-21 1985-09-07 Toshiba Mach Co Ltd Injection molding machine

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5862030A (en) * 1981-10-08 1983-04-13 Nissei Plastics Ind Co Injection molder
JPS60174623A (en) * 1984-02-21 1985-09-07 Toshiba Mach Co Ltd Injection molding machine

Also Published As

Publication number Publication date
JPH0673884B2 (en) 1994-09-21

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