JPH06155534A - Measurement controlling device of injection molding machine - Google Patents
Measurement controlling device of injection molding machineInfo
- Publication number
- JPH06155534A JPH06155534A JP30746392A JP30746392A JPH06155534A JP H06155534 A JPH06155534 A JP H06155534A JP 30746392 A JP30746392 A JP 30746392A JP 30746392 A JP30746392 A JP 30746392A JP H06155534 A JPH06155534 A JP H06155534A
- Authority
- JP
- Japan
- Prior art keywords
- screw
- speed
- injection
- control
- pressure
- 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
Landscapes
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、射出成形機の計量制御
装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metering control device for an injection molding machine.
【０００２】[0002]
【従来の技術】従来、射出成形機によって成形品を成形
する場合、まず、成形材料である樹脂を加熱シリンダに
よって溶融してスクリューヘッドの前方に蓄える作業、
すなわち計量が行われる。この計量工程においては、ス
クリューが駆動手段によって回転させられ、この時、樹
脂は回転する前記スクリューの溝の中を前方に移動し、
加熱シリンダ内で溶融し、スクリューヘッドの前方に蓄
えられる。2. Description of the Related Art Conventionally, when molding a molded article by an injection molding machine, first, a work of melting a resin as a molding material by a heating cylinder and storing it in front of a screw head,
That is, weighing is performed. In this measuring step, the screw is rotated by the driving means, and at this time, the resin moves forward in the groove of the rotating screw,
It melts in the heating cylinder and is stored in front of the screw head.
【０００３】樹脂の溶融に伴い発生する加熱シリンダ内
の樹脂圧は、スクリューに対する反力となり、該反力に
よってスクリューはあらかじめ設定された設定位置まで
後退させられる。こうして、スクリューヘッドの前方に
蓄えられた樹脂は、続いて該スクリューを射出用モータ
が前方に押し出すことによって射出ノズルから射出さ
れ、金型のキャビティ内に充填（じゅうてん）される。The resin pressure in the heating cylinder generated by the melting of the resin becomes a reaction force to the screw, and the reaction force causes the screw to retract to a preset position. In this way, the resin accumulated in front of the screw head is subsequently injected from the injection nozzle by pushing the screw forward by the injection motor, and is filled in the cavity of the mold.
【０００４】前記射出工程が完了した後に、キャビティ
内の樹脂が冷却して収縮する分を補うため、前記射出用
モータによって一定の力を作用させて保圧が行われる。
続いて、前記キャビティ内の樹脂が冷却され、エジェク
タ装置によって成形品が取り出される。ところで、前記
計量工程はスクリューが前記設定位置まで後退すると完
了するようになっているが、この場合、設定位置にスク
リューが到達してからスクリュー回転数を低下させる
か、又は設定位置のわずかに手前の位置をリミットスイ
ッチや別の設定によって検出し、その位置にスクリュー
が到達するとスクリュー回転数を低下させるようになっ
ている。After the injection process is completed, a constant force is applied by the injection motor to maintain the pressure in order to compensate for the shrinkage of the resin in the cavity due to cooling.
Then, the resin in the cavity is cooled and the molded product is taken out by the ejector device. By the way, the metering process is designed to be completed when the screw retracts to the set position, but in this case, the screw rotation speed is lowered after the screw reaches the set position, or slightly before the set position. The position of is detected by a limit switch or another setting, and when the screw reaches that position, the screw rotation speed is reduced.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、前記従
来の射出成形機においては、計量工程が完了する前記設
定位置においてスクリューは停止せず、オーバーランが
発生してしまうだけでなく、オーバーランの量が樹脂の
種類、成形条件等によって変化してしまう。また、設定
位置のわずかに手前の位置を別に設定する場合も樹脂の
種類、成形条件等に対応して前記設定位置を変更するよ
うにしているが、そのための作業が煩わしく、また、設
定位置を変更しても実際にスクリューが停止する位置が
各ショットごとに異なってしまう。However, in the conventional injection molding machine, the screw does not stop at the setting position where the measuring process is completed, and not only the overrun occurs, but also the amount of the overrun is generated. Varies depending on the type of resin, molding conditions, and the like. Also, when setting a position slightly before the setting position separately, the setting position is changed according to the type of resin, molding conditions, etc., but the work for that is troublesome, and the setting position can be changed. Even if changed, the position where the screw actually stops will be different for each shot.
【０００６】本発明は、前記従来の射出成形機の問題点
を解決して、計量工程が完了した時にスクリューのオー
バーランが発生するのを防止し、各ショットごとに射出
される樹脂量を安定させることができる射出成形機の計
量制御装置を提供することを目的とする。The present invention solves the problems of the conventional injection molding machine, prevents the overrun of the screw from occurring when the measuring process is completed, and stabilizes the amount of resin injected at each shot. It is an object of the present invention to provide a measurement control device for an injection molding machine that can perform the above.
【０００７】[0007]
【課題を解決するための手段】そのために、本発明の射
出成形機の計量制御装置においては、加熱シリンダ内に
おいて進退自在に配設されたスクリューと、該スクリュ
ーを進退させる射出用モータと、前記スクリューを回転
させる回転用モータを有する。そして、スクリューの背
圧を検出する手段と、スクリュー速度を検出する手段
と、スクリュー回転数を検出する手段が設けられるとと
もに、スクリュー速度を最大値から０まで変化させた速
度パターンを格納した記憶装置が設けられる。Therefore, in the metering control device of the injection molding machine of the present invention, a screw disposed so as to advance and retract in the heating cylinder, an injection motor for advancing and retracting the screw, and It has a rotation motor for rotating the screw. A storage device is provided which has a means for detecting the back pressure of the screw, a means for detecting the screw speed, and a means for detecting the screw rotation speed, and stores a speed pattern in which the screw speed is changed from the maximum value to 0. Is provided.
【０００８】また、計量工程が完了する位置のわずかに
手前の切換位置まで射出用モータによる圧力制御を行
い、前記切換位置において圧力制御から速度制御に切り
換える手段が設けられる。該速度制御においては、前記
速度パターンに基づいて射出用モータによる速度制御が
行われるとともに、前記速度パターンのスクリュー速度
に対応して、回転用モータによる速度制御が行われる。Further, there is provided means for performing pressure control by the injection motor to a switching position slightly before the position where the weighing process is completed, and switching from pressure control to speed control at the switching position. In the speed control, the speed control by the injection motor is performed based on the speed pattern, and the speed control by the rotation motor is performed corresponding to the screw speed of the speed pattern.
【０００９】[0009]
【作用】本発明によれば、前記のように射出成形機の計
量制御装置は、加熱シリンダ内において進退自在に配設
されたスクリューと、該スクリューを進退させる射出用
モータと、前記スクリューを回転させる回転用モータを
有する。そして、スクリューの背圧を検出する手段と、
スクリュー速度を検出する手段と、スクリュー回転数を
検出する手段が設けられるとともに、スクリュー速度を
最大値から０まで変化させた速度パターンを格納した記
憶装置が設けられる。According to the present invention, as described above, the metering control device of the injection molding machine is configured to rotate the screw, the screw disposed so as to advance and retract in the heating cylinder, the injection motor for advancing and retracting the screw. It has a rotating motor. And means for detecting the back pressure of the screw,
A means for detecting the screw speed and a means for detecting the screw rotation speed are provided, and a storage device for storing a speed pattern in which the screw speed is changed from the maximum value to 0 is provided.
【００１０】また、計量工程が完了する位置のわずかに
手前の切換位置まで射出用モータによる圧力制御を行
い、スクリューの背圧を設定値にする。前記切換位置に
おいて圧力制御から速度制御に切り換えられる。該速度
制御においては、前記記憶装置から速度パターンが読み
出され、該速度パターンに基づいて射出用モータによる
速度制御が行われるとともに、前記速度パターンのスク
リュー速度に対応してスクリュー回転数の設定値が計算
され、回転用モータによる速度制御が行われる。Further, pressure control by the injection motor is performed to a switching position slightly before the position where the measuring process is completed, and the back pressure of the screw is set to a set value. At the switching position, pressure control is switched to speed control. In the speed control, a speed pattern is read from the storage device, speed control is performed by an injection motor based on the speed pattern, and a set value of the screw rotation speed corresponding to the screw speed of the speed pattern is set. Is calculated and the speed is controlled by the rotation motor.
【００１１】[0011]
【実施例】以下、本発明の実施例について図面を参照し
ながら詳細に説明する。図１は本発明の実施例を示す射
出成形機の計量制御装置のブロック図、図２は本発明の
実施例を示す射出成形機の計量制御装置の速度と位置偏
差の関係図、図３は速度パターン値と位置偏差の関係を
示す図である。図２の（ａ）は速度パターンを示す図、
（ｂ）はスクリューの後退量の変化を示す図、（ｃ）は
位置偏差の変化を示す図である。Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a block diagram of a measurement control device for an injection molding machine showing an embodiment of the present invention, FIG. 2 is a relationship diagram of speed and position deviation of a measurement control device for an injection molding machine showing an embodiment of the present invention, and FIG. It is a figure which shows the relationship between a velocity pattern value and a position deviation. FIG. 2A is a diagram showing a speed pattern,
(B) is a figure which shows the change of the amount of retreat of a screw, (c) is a figure which shows the change of a position deviation.
【００１２】図において、１１は図示しないスクリュー
を進退させるために駆動される射出用モータとしての射
出用サーボモータ、１２は計量工程時にスクリューを回
転させるために駆動される回転用モータとしての回転用
サーボモータである。前記射出用サーボモータ１１及び
回転用サーボモータ１２にはそれぞれエンコーダ１３，
１４が設けられ、回転数を検出することができるように
なっている。In the figure, 11 is an injection servomotor as an injection motor that is driven to advance and retreat a screw (not shown), and 12 is a rotation motor that is driven to rotate the screw during the weighing process. It is a servo motor. The injection servo motor 11 and the rotation servo motor 12 have encoders 13,
14 is provided so that the number of rotations can be detected.
【００１３】１５は前記エンコーダ１３が検出した回転
数の信号を受けるとともに射出用サーボモータ１１に駆
動電流を供給する射出用サーボアンプ、１６は前記エン
コーダ１４が検出した回転数の信号を受けるとともに回
転用サーボモータ１２に駆動電流を供給する回転用サー
ボアンプ、１７はＲＡＭ、１８は前記射出用サーボアン
プ１５及び回転用サーボアンプ１６に対してそれぞれ速
度指令信号を出力する可塑化用コントローラ、２０はス
クリューの背圧を検出するためにスクリューの後端に配
設されたロードセルなどの圧力検出器である。Reference numeral 15 denotes an injection servo amplifier which receives a rotation speed signal detected by the encoder 13 and supplies a drive current to the injection servo motor 11, and 16 rotates while receiving a rotation speed signal detected by the encoder 14. A servo amplifier for supplying a drive current to the servo motor for use 12, a RAM 17; a plasticizing controller 18 for outputting speed command signals to the injection servo amplifier 15 and the rotary servo amplifier 16; A pressure detector such as a load cell disposed at the rear end of the screw for detecting the back pressure of the screw.
【００１４】次に、前記構成の射出成形機の計量制御装
置の動作について説明する。計量工程時において、可塑
化用コントローラ１８は、樹脂の供給に伴い発生するス
クリューの背圧を前記圧力検出器２０によって検出し、
検出した圧力が設定値になるように射出用サーボモータ
１１を駆動し、圧力制御を行う。そして、計量工程が完
了する設定位置のわずかに手前で射出用サーボモータ１
１による圧力制御から速度制御に切り換える。この場
合、ＲＡＭ１７内には図２で示す速度パターンがあらか
じめ格納されていて、速度パターン値に従い速度制御が
行われ、前記設定位置を目標値としてスクリューを後退
させる。Next, the operation of the measurement control device of the injection molding machine having the above-mentioned structure will be described. At the time of the measuring step, the plasticizing controller 18 detects the back pressure of the screw generated by the supply of the resin by the pressure detector 20,
The injection servomotor 11 is driven so that the detected pressure becomes a set value, and pressure control is performed. Then, slightly before the set position where the weighing process is completed, the injection servo motor 1
The pressure control by 1 is switched to the speed control. In this case, the speed pattern shown in FIG. 2 is stored in advance in the RAM 17, speed control is performed according to the speed pattern value, and the screw is retracted with the set position as the target value.
【００１５】この時、図２の（ａ）に示すように、射出
用サーボモータ１１が速度制御を行う際の設定値である
速度パターン値ＶP は ＶP ＝Ｖ0 −ａｔ Ｖ0 ：計量工程時において想定されるスクリュー速度Ｖ
の最大値 ａ：加速度 ｔ：時間 の一次関数で表すことができる。したがって、スクリュ
ーの後退量Ｓt は Ｓt ＝Ｖ0 ｔ−（１／２）ａｔ2 ＝（Ｖ0 2 −ＶP 2 ）／２ａ …（１） となり、図２の（ｂ）に示すように推移する。At this time, as shown in FIG. 2A, the speed pattern value V P, which is a set value when the injection servomotor 11 performs speed control, is V P = V 0 -at V 0 : measurement Screw speed V assumed during the process
Can be represented by a linear function of a: acceleration t: time. Thus, retraction amount S t of the screw S t = V 0 t- (1/2 ) at 2 = (V 0 2 -V P 2) / 2a ... (1) becomes, as shown in FIG. 2 (b) Transition to.
【００１６】ここで、前記加速度ａは ａ＝Ｖ0 ／Ｔ0 …（２） Ｔ0 ：速度パターン値ＶP が最大値Ｖ0 から０になるま
での時間であり、また、計量工程が完了する設定位置か
らスクリュー位置を減じた位置偏差ｅは、速度制御区間
において ｅ＝ｅ0 −Ｓt …（３） ｅ0 ：スクリュー速度Ｖが最大値Ｖ0 から０になるまで
にスクリューが進む距離であり、位置偏差ｅの最大値と
なり、図２の（ｃ）に示すように推移する。Here, the acceleration a is a = V 0 / T 0 (2) T 0 : time required for the velocity pattern value V P to change from the maximum value V 0 to 0, and the measuring process is completed. positional deviation e obtained by subtracting the screw position from the set position to the speed control e = e 0 -S t ... in section (3) e 0: distance screw speed V advances is screw until the 0 from the maximum value V 0 Is the maximum value of the position deviation e, and changes as shown in FIG.
【００１７】また、最大値ｅ0 は式（１）において、 ｔ＝Ｔ0 とすることによって ｅ0 ＝Ｖ0 Ｔ0 −（１／２）ａＴ0 2 …（４） で表すことができる。Further, the maximum value e 0 can be expressed as e 0 = V 0 T 0 − (1/2) aT 0 2 (4) by setting t = T 0 in the equation (1).
【００１８】したがって、式（１），（２），（３）及
び（４）から速度パターン値ＶP は ＶP ＝√（２Ｖ0 ｅ／Ｔ0 ） …（５） となり、図３に示すように推移する。このように、位置
偏差ｅをパラメータとして速度パターン値ＶP を決定す
ることができる。ただし、計量工程中に式（５）の計算
を可塑化用コントローラ１８に逐次させると、計算負荷
が増大して制御性能が低下するため、あらかじめ式
（５）によって速度パターン値ＶP を計算し、ＲＡＭ１
７に記憶させておく。そして、計量工程が完了する設定
位置にスクリューが近づくと、位置偏差ｅは減少し、や
がて ｅ0 ＞ｅ となるとともに、速度パターン値ＶP も減少する この時、圧力制御中の射出用サーボアンプ１５に与える
速度指令値ＶC を ＶC ＝ＶS とし、この速度指令値ＶS と位置偏差ｅの値に相当する
速度パターン値ＶP を逐次比較する。そして、 ＶS ＞ＶP となった時点で ＶC ＝ＶP とし、射出用サーボモータ１１の圧力制御を打ち切り、
速度制御に切り換えて、位置偏差ｅの大きさに相当する
速度パターン値ＶP を順次射出用サーボアンプ１５に出
力する。Therefore, from the equations (1), (2), (3) and (4), the velocity pattern value V P is V P = √ (2V 0 e / T 0 ) ... (5), which is shown in FIG. To change. In this way, the velocity pattern value V P can be determined using the position deviation e as a parameter. However, if the plasticizing controller 18 sequentially performs the calculation of the equation (5) during the weighing process, the calculation load increases and the control performance deteriorates. Therefore, the speed pattern value V P is calculated in advance by the equation (5). , RAM1
Store it in 7. Then, when the screw approaches the set position where the measuring process is completed, the position deviation e decreases, and eventually e 0 > e, and the velocity pattern value V P also decreases. At this time, the injection servo amplifier for pressure control The speed command value V C given to 15 is set to V C = V S, and this speed command value V S and the speed pattern value V P corresponding to the value of the position deviation e are successively compared. Then, when V S > V P , V C = V P, and the pressure control of the injection servomotor 11 is terminated.
By switching to speed control, the speed pattern value V P corresponding to the magnitude of the position deviation e is sequentially output to the injection servo amplifier 15.
【００１９】なお、前記速度パターンは二次以上の関数
又は他の曲線によって設定してもよい。また、加速度
ａ、最大値Ｖ0 及び減速時間Ｔ0 は射出成形機の可塑化
装置の規格などによって最適値が決定される。図４は本
発明の射出成形機の計量制御装置の動作を示すフローチ
ャート、図５は本発明の射出成形機の計量制御装置にお
けるタイムチャートである。図５の（ａ）は射出用サー
ボアンプ１５に与える速度指令値ＶC のタイムチャー
ト、（ｂ）は回転用サーボアンプに与える回転速度指令
値ＮC のタイムチャートである。ステップＳ１ スクリ
ューの背圧が設定値になるように射出用サーボモータ１
１（図１）を圧力制御する。この間、速度指令値ＶC は
最大値Ｖ0 より低い値ＶSで推移する。ステップＳ２
位置偏差ｅが減少して最大値ｅ0 に達したか否かを判断
する。位置偏差ｅが大きく、最大値ｅ0 に達していない
場合はステップＳ１に戻り、最大値ｅ0 に達している場
合はステップＳ３に進む。ステップＳ３ 速度指令値Ｖ
S が速度パターン値ＶP より大きいか否かを判断する。
大きい場合はステップＳ４に進み、小さい場合はステッ
プＳ１に戻る。ステップＳ４ 速度指令値ＶC が、 ＶC ＝ＶP となるように射出用サーボモータ１１を速度制御し、か
つ、スクリュー回転数Ｎの設定値ＮC が、 ＮC ＝ＶC ・ＮS ／ＶS となるように回転用サーボモータ１２を速度制御する。
ステップＳ５ 位置偏差ｅが０であるか否かを判断す
る。０の場合は計量工程を完了し、０でない場合はステ
ップＳ４に戻る。The speed pattern may be set by a quadratic or higher function or another curve. The optimum values of the acceleration a, the maximum value V 0 and the deceleration time T 0 are determined according to the specifications of the plasticizing device of the injection molding machine and the like. FIG. 4 is a flow chart showing the operation of the measurement control device of the injection molding machine of the present invention, and FIG. 5 is a time chart in the measurement control device of the injection molding machine of the present invention. 5A is a time chart of the speed command value V C given to the injection servo amplifier 15, and FIG. 5B is a time chart of the rotation speed command value N C given to the rotation servo amplifier. Step S1 The injection servomotor 1 so that the back pressure of the screw becomes the set value.
1 (FIG. 1) is pressure controlled. During this time, the speed command value V C changes to a value V S lower than the maximum value V 0 . Step S2
It is determined whether the position deviation e has decreased and reached the maximum value e 0 . If the positional deviation e is large and has not reached the maximum value e 0 , the process returns to step S1, and if it has reached the maximum value e 0 , the process proceeds to step S3. Step S3 Speed command value V
It is determined whether S is larger than the speed pattern value V P.
If it is larger, the process proceeds to step S4, and if it is smaller, the process returns to step S1. Step S4: The injection servomotor 11 is speed-controlled so that the speed command value V C becomes V C = V P , and the set value N C of the screw rotation speed N is N C = V C · N S / The speed of the rotation servomotor 12 is controlled so as to be V S.
In step S5, it is determined whether the position deviation e is 0. If it is 0, the weighing process is completed, and if it is not 0, the process returns to step S4.
【００２０】なお、本発明は前記実施例に限定されるも
のではなく、本発明の趣旨に基づいて種々変形すること
が可能であり、これらを本発明の範囲から排除するもの
ではない。The present invention is not limited to the above-mentioned embodiments, but various modifications can be made based on the spirit of the present invention, and these are not excluded from the scope of the present invention.
【００２１】[0021]
【発明の効果】以上詳細に説明したように、本発明によ
れば、射出成形機の計量制御装置は、加熱シリンダ内に
おいて進退自在に配設されたスクリューと、該スクリュ
ーを進退させる射出用モータと、前記スクリューを回転
させる回転用モータを有する。そして、スクリューの背
圧を検出する手段と、スクリュー速度を検出する手段
と、スクリュー回転数を検出する手段が設けられるとと
もに、スクリュー速度を最大値から０まで変化させた速
度パターンを格納した記憶装置が設けられる。As described above in detail, according to the present invention, the measurement control device of the injection molding machine is provided with a screw arranged in the heating cylinder so as to be movable back and forth, and an injection motor for moving the screw back and forth. And a rotation motor for rotating the screw. A storage device is provided which has a means for detecting the back pressure of the screw, a means for detecting the screw speed, and a means for detecting the screw rotation speed, and stores a speed pattern in which the screw speed is changed from the maximum value to 0. Is provided.
【００２２】計量工程が完了する位置のわずかに手前の
切換位置まで射出用モータによる圧力制御を行い、スク
リューの背圧を設定値にする。前記切換位置において圧
力制御から速度制御に切り換えられる。該速度制御にお
いては、前記記憶装置から速度パターンが読み出され、
該速度パターンに基づいて射出用モータによる速度制御
が行われるとともに、前記速度パターンのスクリュー速
度に対応してスクリュー回転数の設定値が計算され、回
転用モータによる速度制御が行われる。The pressure is controlled by the injection motor to a switching position slightly before the position where the measuring process is completed, and the back pressure of the screw is set to a set value. At the switching position, pressure control is switched to speed control. In the speed control, a speed pattern is read from the storage device,
The speed control by the injection motor is performed based on the speed pattern, the set value of the screw rotation speed is calculated corresponding to the screw speed of the speed pattern, and the speed control by the rotation motor is performed.
【００２３】このように、計量工程が完了する設定位置
を目標にしながら射出用モータによる速度制御でスクリ
ュー速度が自動的に低下させられるため、樹脂の種類、
成形条件等に対応してスクリューの回転数を低下させる
設定位置を設定する必要がなくなり、作業が簡素化され
るとともに各ショットごとのスクリューの停止位置が安
定する。As described above, the screw speed is automatically reduced by the speed control by the injection motor while targeting the set position where the measuring process is completed.
It is not necessary to set a setting position for lowering the rotation speed of the screw in accordance with molding conditions and the like, which simplifies the work and stabilizes the screw stop position for each shot.
【図１】本発明の実施例を示す射出成形機の計量制御装
置のブロック図である。FIG. 1 is a block diagram of a measurement control device of an injection molding machine showing an embodiment of the present invention.
【図２】本発明の実施例を示す射出成形機の計量制御装
置の速度と位置偏差の関係図である。FIG. 2 is a relationship diagram of speed and position deviation of the measurement control device of the injection molding machine showing the embodiment of the present invention.
【図３】速度パターン値と位置偏差の関係を示す図であ
る。FIG. 3 is a diagram showing a relationship between a velocity pattern value and position deviation.
【図４】本発明の射出成形機の計量制御装置の動作を示
すフローチャートである。FIG. 4 is a flow chart showing the operation of the measurement control device of the injection molding machine of the present invention.
【図５】本発明の射出成形機の計量制御装置におけるタ
イムチャートである。FIG. 5 is a time chart in the measurement control device of the injection molding machine of the present invention.
１１ 射出用サーボモータ １２ 回転用サーボモータ １３，１４ エンコーダ １５ 射出用サーボアンプ １６ 回転用サーボアンプ １７ ＲＡＭ １８ 可塑化用コントローラ ２０ 圧力検出器 11 Servo Motor for Injection 12 Servo Motor for Rotation 13, 14 Encoder 15 Servo Amplifier for Injection 16 Servo Amplifier for Rotation 17 RAM 18 Plasticization Controller 20 Pressure Detector
Claims (1)
に配設されたスクリューと、（ｂ）該スクリューを進退
させる射出用モータと、（ｃ）前記スクリューを回転さ
せる回転用モータと、（ｄ）スクリューの背圧を検出す
る手段と、（ｅ）スクリュー速度を検出する手段と、
（ｆ）スクリュー回転数を検出する手段と、（ｇ）スク
リュー速度を最大値から０まで変化させた速度パターン
を格納した記憶装置と、（ｈ）計量工程が完了する位置
のわずかに手前の切換位置まで射出用モータによる圧力
制御を行い、前記切換位置において圧力制御から速度制
御に切り換える手段と、（ｉ）前記速度パターンに基づ
いて射出用モータによる速度制御を行う手段と、（ｊ）
前記速度パターンのスクリュー速度に対応して、回転用
モータによる速度制御を行う手段を有することを特徴と
する射出成形機の計量制御装置。1. A screw, which is arranged so as to move forward and backward in a heating cylinder, (b) an injection motor which advances and retracts the screw, (c) a rotation motor which rotates the screw, and (d). ) Means for detecting the back pressure of the screw, (e) means for detecting the screw speed,
(F) A means for detecting the screw rotation speed, (g) a storage device that stores a speed pattern in which the screw speed is changed from the maximum value to 0, and (h) a switch slightly before the position where the weighing process is completed. Means for performing pressure control by the injection motor to the position and switching from pressure control to speed control at the switching position; (i) means for performing speed control by the injection motor based on the speed pattern; and (j)
A metering control device for an injection molding machine, comprising means for performing speed control by a rotation motor corresponding to the screw speed of the speed pattern.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30746392A JP3251669B2 (en) | 1992-11-18 | 1992-11-18 | Injection molding machine metering control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30746392A JP3251669B2 (en) | 1992-11-18 | 1992-11-18 | Injection molding machine metering control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06155534A true JPH06155534A (en) | 1994-06-03 |
| JP3251669B2 JP3251669B2 (en) | 2002-01-28 |
Family
ID=17969379
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30746392A Expired - Fee Related JP3251669B2 (en) | 1992-11-18 | 1992-11-18 | Injection molding machine metering control device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3251669B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7021917B2 (en) | 2002-11-05 | 2006-04-04 | Fanuc Ltd | Injection molding machine metering and control device |
| JP2006168325A (en) * | 2004-12-20 | 2006-06-29 | Toyo Mach & Metal Co Ltd | Metering control method of injection molding machine and injection molding machine |
| US8168097B2 (en) * | 2008-02-29 | 2012-05-01 | Nissei Plastic Industrial Co., Ltd. | Injection molding machine and method of controlling the same |
| CN109093922A (en) * | 2012-12-25 | 2018-12-28 | 住友重机械工业株式会社 | Injection (mo(u)lding) machine |
-
1992
- 1992-11-18 JP JP30746392A patent/JP3251669B2/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7021917B2 (en) | 2002-11-05 | 2006-04-04 | Fanuc Ltd | Injection molding machine metering and control device |
| CN1313260C (en) * | 2002-11-05 | 2007-05-02 | 发那科株式会社 | Metering method and controller of injection molding machine |
| JP2006168325A (en) * | 2004-12-20 | 2006-06-29 | Toyo Mach & Metal Co Ltd | Metering control method of injection molding machine and injection molding machine |
| JP4504800B2 (en) * | 2004-12-20 | 2010-07-14 | 東洋機械金属株式会社 | Metering control method for injection molding machine and injection molding machine |
| US8168097B2 (en) * | 2008-02-29 | 2012-05-01 | Nissei Plastic Industrial Co., Ltd. | Injection molding machine and method of controlling the same |
| CN109093922A (en) * | 2012-12-25 | 2018-12-28 | 住友重机械工业株式会社 | Injection (mo(u)lding) machine |
| CN109093922B (en) * | 2012-12-25 | 2021-04-20 | 住友重机械工业株式会社 | Injection molding machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3251669B2 (en) | 2002-01-28 |
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