JP3707648B2 - Control method of swivel type injection molding machine provided with a plurality of mold clamping devices - Google Patents

Control method of swivel type injection molding machine provided with a plurality of mold clamping devices Download PDF

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JP3707648B2
JP3707648B2 JP30111397A JP30111397A JP3707648B2 JP 3707648 B2 JP3707648 B2 JP 3707648B2 JP 30111397 A JP30111397 A JP 30111397A JP 30111397 A JP30111397 A JP 30111397A JP 3707648 B2 JP3707648 B2 JP 3707648B2
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Prior art keywords
mold clamping
injection
control
molding machine
clamping devices
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JPH11129306A (en
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弘幸 坂田
義昌 大嶋
隆 曲尾
和男 碓井
隆 箱田
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Nissei Plastic Industrial Co Ltd
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Nissei Plastic Industrial Co Ltd
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Description

【0001】
【発明の属する技術分野】
この発明は、複数台の型締装置に対し1台の射出装置を旋回移動させて、選択された型締装置ごとに樹脂の射出充填を可能とする旋回式射出成形機の制御方法に関するものである。
【0002】
【発明が解決しようとする課題】
近年、射出成形機の機能に対する要求は高度化、多様化の一途を辿っており、その結果、センサー数の飛躍的な増大を招き、各センサー類と制御装置との連絡を受け持つ通信ケーブルの数が増加し、その配線スペースを得るのに困難を極める事態となっており、さらには制御プログラムの複雑化ともなっている。
【0003】
このような傾向の下に、ベッド上面のターンテーブルに搭載された1台の射出装置に複数台の型締装置を対応させ、ターンテーブルにより射出装置を旋回移動させて、各型締装置に樹脂の射出充填を行う旋回式射出成形機を制御することは、成形稼働させる型締装置の増加からさらに苛酷なものとなる。
【0004】
一方、この難題を解決する手段として、これは必ずしも1台の射出装置に複数台の型締め装置を対応させた型締め装置多台持ち射出成形機を念頭において考案されたものではないが、制御系全体をいくつかのブロックに区分して、その範囲内で制御を行う制御装置をそれぞれに設け、各制御装置相互間をシリアルデータ通信とすることで、配線スペースの大幅な低減が可能となるという提案(特開平5−31778号公報参照)がなされ、さらには、このシリアルデータ通信系統をループに結び、各制御ブロックの一つを親局に、他を子局にすることにより、ローカルエリアネットワーク(LAN)を構成させることも提案(特開平5−250028号公報参照)されている。
【0005】
しかしながら、シリアルデータ通信方式を採ることは通信ケーブル用配線スペースを低減させるには卓効があるものの、当該通信方式を構築する上でのソフト/ハードに要する費用が嵩み、特に1台の射出装置に複数台の型締装置を対応させた旋回式射出成形機においては、経済性の面から採用しにくいという課題を有する。
【0006】
この発明は上記事情から考えられたものであって、その目的は、これまでの中央制御装置で全てを制御するという基本的な考え方を、射出装置の制御装置と各型締装置の制御装置とを対等の立場に置き、相互にトリガー信号を授受することにより協働して成形動作を行うという考えに変え、当該型締装置以外の型締装置は、射出装置との一切の連絡を絶つという新たな構想によって、旋回式射出成形機においても型締装置の成形稼働を選択的に行われ、かつまた機能の高度化及び多様化を可能とし、効率よく生産数量に適合した成形を行い得る旋回式射出成形機の制御方法を提供することにある。
【0007】
【課題を解決するための手段】
上記目的によるこの発明は、ベッド上面のターンテーブルに射出装置が搭載され、そのターンテーブルの円周に沿ったベッド側部に複数台の型締装置が放射状に配置されて、上記射出装置が旋回移動により各型締装置に対応可能に構成された旋回式射出成形機において、各型締装置のそれぞれに、射出装置側の制御装置との関連により作動する制御装置を設け、それらの制御装置の下に任意の型締装置の組合わせによる稼働パターンの選択を可能とする射出成形システムを構成し、成形稼働は選択された型締装置と、当該型締装置に対向した射出装置との制御装置間でのみ授受されるトリガー信号による相互通信制御により協働して行われる、というものである。
【0008】
このような構成では、型締装置のそれぞれが備える制御装置からの指令により、各自の設定条件に従い型開閉及び型締動作と離型動作が行われ、また射出装置側では選択された次位の型締装置へ移行する間に、自体が備える制御装置からの指令により、当該型締装置に対応する設定条件での計量動作を完了し、相互の対向確認後のトリガー信号による相互通信制御によって、当該型締装置における成形が行われることから、成形制御のためのハード及びソフト、さらには配線などが簡単となり、複数台の型締装置を備える旋回式射出成形機であっても機能に対する高度化、多様化等の要求を満たすことが可能となる。
【0009】
また稼働パターンの選択により幾通りかの成形稼働を行い得るので、型締装置ごとの成形金型の交換は原則として行う必要はなく、射出装置はその時点で選択された型締装置と協働して射出成形を行うことになるので、新たな成形品の成形に短時間にて移行することも可能となる。
【0010】
【発明の実施の形態】
図1は、この発明の制御方法の実施の対象となる旋回式射出成形機の概略を示すもので、射出装置1は電動サーボモータを駆動源とする射出ベッド2の上面のターンテーブル3の中央部に搭載されており、この射出ベッド2の三側方にNo1〜No3の3台の型締装置4,5,6が、上記ターンテーブル3の円周に沿って放射状にそれぞれのベッド7,8,9をベッド2の側面に踵を接するよう一体的に結合して配置されている。
【0011】
また射出ベッド2の側部には、成形金型の射出・計量条件、材料樹脂の温度条件、稼働パターン等を制御するとともに、射出波形表示を行う制御装置10(以下、射出制御装置という)が設けられており、各型締ベッド7,8,9の側部には、型締関係設定条件、突出関係設定条件等を制御するとともに、それらの条件を表示することができる制御装置11,12,13(以下、型締制御装置という)設けられている。
【0012】
上記射出制御装置10及び上記型締制御装置11,12,13には、図2に示されるように、装置毎の制御に必要な操作スイッチ部14,15,16,17とモニター18,19,20,21とが備えられ、また型締制御装置11,12,13のそれぞれは、射出装置1の加熱筒温度制御装置22とともに射出制御装置10に電気的に接続されて、射出制御装置10との間にて、稼働パターン、手動/停止、自動/停止、稼働/停止、型締シーケンス、射出シーケンス、異常信号などの信号やタイミングのやりとりを行えるようにしてある。
【0013】
また射出制御装置10には、型締装置4,5,6を選択稼働するための手段が備えられている。選択は型締装置の数が3台であるところから、次の7通りの稼働パターンが設定され、その稼働パターンごとの7個の選択スイッチ23が射出制御装置10に設けられている。なおラインは射出装置の旋回移動を表す。
【0014】

Figure 0003707648
【0015】
上記稼働の原点とは、型締及びノズルタッチ状態で、これからノズル後退と計量を開始する直前の射出装置の位置をいい、稼働状態とは次のサイクルをいう。
射出装置側 後退・計量−旋回−前進−射出(材料充填)−保圧
型締装置側 型開──成形品の離型──型閉──昇圧(型締)──降圧
【0016】
また上記選択パターンのいずれにおいても、その稼働は上記サイクルの全てを完了してから停止するように設定されている。したがって、稼働途中に稼働停止スイッチを押しても、その時点で停止することはなく、1成形サイクルを完了してのち、原点に戻って稼働停止となる。
但し、単一の型締装置の選択パターン5,6,7では、射出装置1の位置は変更されず定位置にあるので、旋回は行われない。
【0017】
成形稼働は先ずパターンの選択から始まる。たとえば選択がパターン2の場合には、射出装置1が内装している射出プランジャが押切り位置にあることと、選択された型締装置4,5のそれぞれが備えているポンプモータが回っていることを確認してから、図では省略されているが、メイン操作スイッチをONする。
次に型締制御装置11,12の自動スイッチと、パターン2のスイッチをONすると、動作は射出制御装置10による射出装置1の原点復帰となって、射出装置1が型締装置4の位置に旋回復帰され、射出装置1と型締装置4とが対向してトリガー信号の授受が行われるようになる。
【0018】
一方、型締装置4,5では、それぞれが備える制御装置11,12により、各自の設定条件に従い型締動作が完了されている。しかし射出装置1では型締装置4の成形金型に射出充填する樹脂の計量は行われていないので、そこにノズルタッチが行われても樹脂の射出充填は行われず、射出制御装置10による指令で射出装置1は後退移動したのち、次位のNo2の型締装置5へと旋回移動され、またその移動中に樹脂の計量が行われる。
【0019】
樹脂の計量は、射出装置1の後退動作の開始と同時に開始され、射出開始に先立って計量完了のチェックがなされる。この際の計量値は次に稼働する型締装置5の成形金型に対応した設定値となる。また射出装置1の旋回と前進及び後退は高速で行われるが、その速度は移動停止位置に達する前にスローダウンするように設定されている。
【0020】
射出装置1は型締装置5と対向した位置で停止し、その確認後にトリガー信号の授受による相互通信制御によって設定条件の確認がなされ、両方の設定条件の符合により樹脂の射出充填が行われる。射出充填後の保圧及びゲートシールを完了し、その確認が行われると、射出装置1は射出制御装置10の指令により後退移動し、さらに旋回移動して次位のNo1の型締装置4の位置に移される。この移動中に計量が行われ、その計量値は型締装置4の成形金型に対応した設定値となる。そして計量完了のチェック行われてのち、トリガー信号の授受による相互通信制御が行われて射出開始となる。
【0021】
このように、射出装置側の射出制御装置と各型締装置の型締制御装置とを対等の立場に置き、相互にトリガー信号を授受することにより協働して成形動作を行えるようにした旋回式射出成形機の制御方法では、中央制御装置で全てを制御するという場合に比べて、制御装置は小容量のもので済み、また制御プログラムの設計は型締装置ごとに、しかも該当型締装置以外の型締装置は、射出装置との一切の連絡を絶つという設定でよいことから、制御プログラムの設計も簡単となり、配線数も省略されて構造的にも簡素なものとなる。
【0022】
さらに成形稼働のパターン化と相俟って、各型締装置における成形金型の交換を頻繁に行うことなく、必要な時に必要な数量の成形が可能となり、多品種少量生産への対応のために余儀なくされる成形金型の交換による時間的なロスが解消され、他の型締装置への移行も短時間に行い得るなど、複数台の型締装置を備えた旋回式射出成形機でありながら、機能が高度化及び多様化されて成形効率も著しく向上するようになる。
【図面の簡単な説明】
【図1】 この発明に係わる制御方法の実施を可能とする3台の型締装置を備え旋回式射出成形機の略示平面図である。
【図2】 同上の制御ブロック図である。
【符号の説明】
1 射出装置
2 射出ベッド
4,5,6 型締装置
7,8,9 型締ベッド
10 射出制御装置
11,12,13 型締制御装置
23 選択スイッチ[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a control method for a swivel injection molding machine in which one injection device is swiveled with respect to a plurality of mold clamping devices to enable resin injection filling for each selected mold clamping device. is there.
[0002]
[Problems to be solved by the invention]
In recent years, the demands on the functions of injection molding machines have become increasingly sophisticated and diversified, resulting in a dramatic increase in the number of sensors, and the number of communication cables in charge of communication between each sensor and control device. As a result, it is becoming extremely difficult to obtain the wiring space, and the control program is also complicated.
[0003]
Under such a tendency, a plurality of mold clamping devices are made to correspond to one injection device mounted on the turntable on the upper surface of the bed, and the injection device is swung by the turntable so that each mold clamping device has a resin. Controlling a swivel injection molding machine that performs the injection filling is more severe due to an increase in the number of mold clamping devices used for molding operation.
[0004]
On the other hand, as a means for solving this problem, this is not necessarily devised in view of a mold-clamping device multi-unit injection molding machine in which a plurality of mold-clamping devices are made to correspond to one injection device. By dividing the entire system into several blocks and providing each with control devices that perform control within that range, and using serial data communication between the control devices, wiring space can be greatly reduced. (Refer to Japanese Patent Laid-Open No. 5-31778), and further, this serial data communication system is connected to a loop, and one of each control block is used as a master station and the other is used as a slave station. It has also been proposed to configure a network (LAN) (see Japanese Patent Laid-Open No. 5-250028).
[0005]
However, although adopting the serial data communication method is effective in reducing the wiring space for the communication cable, the cost required for software / hardware for constructing the communication method is increased, and in particular, one injection is performed. In a swivel type injection molding machine in which a plurality of mold clamping devices are made to correspond to the device, there is a problem that it is difficult to adopt from the economical aspect.
[0006]
The present invention has been conceived from the above circumstances, and its purpose is based on the basic idea of controlling everything with the conventional central control device, the control device of the injection device, and the control device of each mold clamping device. Is placed in an equal position and the idea is to perform the molding operation in cooperation by exchanging trigger signals with each other, and the mold clamping devices other than the mold clamping device are not in contact with the injection device. With the new concept, the swivel injection molding machine can selectively perform the molding operation of the mold clamping device, and also enables the advancement and diversification of functions, enabling efficient molding that conforms to the production quantity. It is providing the control method of a type injection molding machine.
[0007]
[Means for Solving the Problems]
According to the present invention, the injection device is mounted on the turntable on the upper surface of the bed, and a plurality of mold clamping devices are arranged radially on the side of the bed along the circumference of the turntable so that the injection device is swiveled. In a swivel type injection molding machine configured to be compatible with each mold clamping device by movement, each mold clamping device is provided with a control device that operates in connection with the control device on the injection device side. An injection molding system that enables an operation pattern to be selected by a combination of arbitrary mold clamping devices is configured below, and the molding operation is a control device for the selected mold clamping device and the injection device facing the mold clamping device. It is performed in cooperation by mutual communication control by a trigger signal exchanged only between them.
[0008]
In such a configuration, the opening / closing of the mold, the mold clamping operation, and the mold releasing operation are performed according to the respective setting conditions in accordance with a command from the control device included in each of the mold clamping devices, and the next order selected on the injection device side. During the transition to the mold clamping device, the measurement operation under the setting conditions corresponding to the mold clamping device is completed by a command from the control device included in the mold clamping device. Since molding is performed in the mold clamping device, hardware and software for molding control, as well as wiring, etc. are simplified, and even a swivel injection molding machine equipped with multiple mold clamping devices is sophisticated in function. It is possible to satisfy the demand for diversification.
[0009]
In addition, since several molding operations can be performed by selecting the operation pattern, it is not necessary to replace the molding die for each mold clamping device in principle, and the injection device cooperates with the mold clamping device selected at that time. Since injection molding is performed, it is possible to shift to molding a new molded product in a short time.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 shows an outline of a swivel injection molding machine which is an object of carrying out the control method of the present invention. An injection device 1 is a central portion of a turntable 3 on an upper surface of an injection bed 2 which uses an electric servo motor as a drive source. The three mold clamping devices 4, 5, 6, No 1 to No 3, are radially mounted along the circumference of the turntable 3 on the three sides of the injection bed 2. 8 and 9 are integrally connected so that the side surface of the bed 2 is in contact with the heel.
[0011]
Further, on the side of the injection bed 2, there is a control device 10 (hereinafter referred to as an injection control device) that controls the injection / metering conditions of the molding die, the temperature conditions of the material resin, the operation pattern, etc., and displays the injection waveform. Control devices 11 and 12 are provided on the side portions of the respective mold clamping beds 7, 8, and 9 to control mold clamping relation setting conditions, protrusion relation setting conditions, and the like, and to display these conditions. , 13 (hereinafter referred to as a mold clamping control device).
[0012]
As shown in FIG. 2, the injection control device 10 and the mold clamping control devices 11, 12, 13 include operation switch units 14, 15, 16, 17 and monitors 18, 19, necessary for control of each device. 20 and 21, and the mold clamping control devices 11, 12, and 13 are each electrically connected to the injection control device 10 together with the heating cylinder temperature control device 22 of the injection device 1. Between the operation pattern, manual / stop, automatic / stop, operation / stop, mold clamping sequence, injection sequence, error signal, and other signals and timing can be exchanged.
[0013]
The injection control device 10 is provided with means for selectively operating the mold clamping devices 4, 5, 6. Since the number of mold clamping devices is three, the following seven operation patterns are set, and seven selection switches 23 for the respective operation patterns are provided in the injection control device 10. The line represents the turning movement of the injection device.
[0014]
Figure 0003707648
[0015]
The origin of operation refers to the position of the injection device in the mold clamping and nozzle touch state and immediately before the start of nozzle retraction and metering, and the operation state refers to the next cycle.
Injection device side Reverse / Metering-Swivel-Advancing-Injection (material filling) -Pressure holding mold clamping device side Mold opening--Mold release--Closing--Pressurization (clamping)-Pressure reduction
In any of the above selection patterns, the operation is set to stop after completing all the cycles. Therefore, even if the operation stop switch is pressed during operation, the operation stop switch is not stopped at that time, and after completion of one molding cycle, the operation returns to the origin and is stopped.
However, in the selection patterns 5, 6 and 7 of the single mold clamping device, the position of the injection device 1 is not changed and is in a fixed position, so that no turning is performed.
[0017]
The molding operation starts with pattern selection. For example, when the selection is pattern 2, the injection plunger incorporated in the injection device 1 is in the push-off position, and the pump motors included in each of the selected mold clamping devices 4 and 5 are rotating. After confirming this, although not shown in the figure, the main operation switch is turned on.
Next, when the automatic switch of the mold clamping control devices 11 and 12 and the switch of pattern 2 are turned on, the operation is the origin return of the injection device 1 by the injection control device 10, and the injection device 1 is brought to the position of the mold clamping device 4. The rotation is returned, and the injection device 1 and the mold clamping device 4 face each other to exchange the trigger signal.
[0018]
On the other hand, in the mold clamping devices 4 and 5, the mold clamping operation is completed according to the respective setting conditions by the control devices 11 and 12 included in the mold clamping devices 4 and 5. However, since the injection device 1 does not measure the resin to be injected and filled into the molding die of the mold clamping device 4, the resin is not injected and filled even if the nozzle touch is performed there. Then, after the injection device 1 moves backward, it is turned to the next No. 2 mold clamping device 5 and the resin is weighed during the movement.
[0019]
The weighing of the resin is started simultaneously with the start of the reverse operation of the injection device 1, and the completion of the weighing is checked before the start of the injection. The measured value at this time is a set value corresponding to the molding die of the mold clamping device 5 to be operated next. Further, the turning, advance and retreat of the injection device 1 are performed at high speed, and the speed is set so as to slow down before reaching the movement stop position.
[0020]
The injection device 1 stops at a position facing the mold clamping device 5. After the confirmation, the setting conditions are confirmed by mutual communication control by sending and receiving a trigger signal, and the resin is injected and filled according to the agreement of both the setting conditions. When the pressure holding and gate sealing after injection filling is completed and the confirmation is made, the injection device 1 moves backward in response to a command from the injection control device 10 and further turns to move the next No. 1 mold clamping device 4. Moved to position. Weighing is performed during this movement, and the measured value becomes a set value corresponding to the mold of the mold clamping device 4. Then, after the completion of measurement is checked, mutual communication control is performed by sending and receiving a trigger signal, and injection is started.
[0021]
In this way, the swivel that enables the injection control device on the injection device side and the mold clamping control device of each mold clamping device to be in the same position and perform the molding operation in cooperation by exchanging trigger signals with each other. In the control method of the injection molding machine, the control device needs to have a small capacity compared to the case where all are controlled by the central control device, and the design of the control program is designed for each mold clamping device. Since the mold clamping device other than the above may be set so that all communication with the injection device is cut off, the design of the control program is simplified, the number of wires is omitted, and the structure is simple.
[0022]
Furthermore, combined with the patterning of the molding operation, it is possible to mold the required quantity when necessary without frequently changing the molds in each mold clamping device, and to support high-mix low-volume production. This is a swivel type injection molding machine equipped with multiple mold clamping devices, such as eliminating the time loss caused by replacement of molding dies that must be done, and making it possible to move to other mold clamping devices in a short time. However, as the functions are advanced and diversified, the molding efficiency is remarkably improved.
[Brief description of the drawings]
FIG. 1 is a schematic plan view of a swivel injection molding machine having three mold clamping devices that enable the control method according to the present invention to be carried out.
FIG. 2 is a control block diagram of the above.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Injection device 2 Injection bed 4, 5, 6 Clamping device 7, 8, 9 Clamping bed 10 Injection control device 11, 12, 13 Clamping control device 23 Selection switch

Claims (1)

ベッド上面のターンテーブルに射出装置が搭載され、そのターンテーブルの円周に沿ったベッド側部に複数台の型締装置が放射状に配置されて、上記射出装置が旋回移動により各型締装置に順に対応可能に構成された旋回式射出成形機において、
各型締装置のそれぞれに、射出装置側の制御装置との関連により作動する制御装置を設け、それらの制御装置の下に任意の型締装置の組合わせによる稼働パターンの選択を可能とする射出成形システムを構成し、成形稼働は選択された型締装置と、当該型締装置に対向した射出装置との制御装置間でのみ授受されるトリガー信号による相互通信制御により協働して行われることを特徴とする複数台の型締装置を備えた旋回式射出成形機の制御方法。
An injection device is mounted on the turntable on the upper surface of the bed, and a plurality of mold clamping devices are arranged radially on the side of the bed along the circumference of the turntable. In a swivel type injection molding machine configured to be compatible in order,
Each mold clamping device is provided with a control device that operates in connection with the control device on the injection device side, and an injection that enables selection of an operation pattern by combining arbitrary mold clamping devices under those control devices The molding system is configured, and the molding operation is performed in cooperation by mutual communication control by a trigger signal exchanged only between the selected clamping device and the control device of the injection device facing the clamping device. A control method for a swivel type injection molding machine comprising a plurality of mold clamping devices.
JP30111397A 1997-10-31 1997-10-31 Control method of swivel type injection molding machine provided with a plurality of mold clamping devices Expired - Fee Related JP3707648B2 (en)

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JP30111397A JP3707648B2 (en) 1997-10-31 1997-10-31 Control method of swivel type injection molding machine provided with a plurality of mold clamping devices

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