JP2013049143A - Control method of rotary injection molding machine - Google Patents

Control method of rotary injection molding machine Download PDF

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JP2013049143A
JP2013049143A JP2011186883A JP2011186883A JP2013049143A JP 2013049143 A JP2013049143 A JP 2013049143A JP 2011186883 A JP2011186883 A JP 2011186883A JP 2011186883 A JP2011186883 A JP 2011186883A JP 2013049143 A JP2013049143 A JP 2013049143A
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molding
injection
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control method
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Yuji Higashimura
裕司 東村
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Nanbu Plastics Co Ltd
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Nanbu Plastics Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a control method that can startup and end the continuous molding of the rotary injection molding machine without waste of raw materials of molding, energy and time.SOLUTION: When the continuous molding is started up by rotary injection molding machine 1 that has the eighth order molding processes, the injection filling is executed only for the cavity 18a of the primary molding, the injection filling to respective cavities 18b-18h of the secondary molding to the eighth order molding are stopped. Whenever transiting to the next molding process by rotating a spinning disk 9 at (360/8) degree, and the cavities of the second molding to the eighth order molding to execute the injection filling are sequentially added, and in the eighth order or later molding processes, injection filling is performed to all cavities and the continuous molding is started up.

Description

本発明は、ロータリ射出成形機の連続成形を立上げ及び終了させる制御方法に関する。   The present invention relates to a control method for starting and ending continuous molding of a rotary injection molding machine.

特許文献１には、ロータリ射出成形機を用いて２層成形によってレンズを多層成形する技術が開示されている。また、特許文献２には、ロータリ射出成形機を用いて２色成形によって光学部品を多色成形する技術が開示されている。   Patent Document 1 discloses a technique for multilayer molding of lenses by two-layer molding using a rotary injection molding machine. Patent Document 2 discloses a technique for performing multicolor molding of optical components by two-color molding using a rotary injection molding machine.

このような多層成形又は多色成形において、その連続成形を立上げるときには、複数のキャビティの全てに溶融樹脂が充填されていない状態である。そのため、２次成形以降のキャビティには、その成形工程より一次前の成形工程で成形した中間成形品をインサートするか又は、その成形工程の射出計量を中間成形品に相当する分だけ増量して射出充填していた。   In such multilayer molding or multicolor molding, when the continuous molding is started up, all of the plurality of cavities are not filled with molten resin. Therefore, insert the intermediate molded product molded in the molding process prior to the molding process into the cavity after the secondary molding, or increase the injection metering in the molding process by the amount corresponding to the intermediate molded product. It was injection filled.

多層成形又は多色成形の連続成形を停止させるときには、最終次の一次前までの成形工程における中間成形品はそのままキャビティ内に残存させていた。   When the continuous molding of the multilayer molding or the multicolor molding is stopped, the intermediate molded product in the molding process until the final primary is left in the cavity as it is.

特開２００８−１０７４９０号公報JP 2008-107490 A 特開２０１０−８９３９８号公報JP 2010-89398 A

しかしながら、連続成形の立上げ時に中間成形品をインサートする場合は、中間成形品を予め準備しインサート操作をしなければならず、労力と時間を浪費するとともに、インサート操作の際に金型のキャビティ面等を損傷させる虞がある。また、連続成形の立上げ時に射出計量を増量する場合は、射出成形機のシーケンス・プロセス制御を特殊なものに変更する必要があるとともに、そのときの中間成形品がより厚肉となるので長い冷却時間を要し成形時間の延長を来す。さらに、上記の対策をせずに連続成形を立上げたときには、２次成形以降に相当するキャビティに射出充填された溶融樹脂は中間成形品にも完成した成形品にもならず全く無駄なものとなる。   However, when inserting an intermediate molded product at the start of continuous molding, it is necessary to prepare the intermediate molded product in advance and perform the insert operation, which wastes labor and time, and during the insert operation the mold cavity The surface may be damaged. In addition, when increasing the injection metering at the start of continuous molding, it is necessary to change the sequence process control of the injection molding machine to a special one, and the intermediate molded product at that time becomes thicker and longer. The cooling time is required and the molding time is extended. Furthermore, when continuous molding is started without taking the above measures, the molten resin injected and filled in the cavity corresponding to the secondary molding or later is not an intermediate molded product nor a finished molded product, and is completely useless. It becomes.

連続成形を停止させるときには、キャビティ内に残存した中間成形品は完成した成形品にはならず、廃棄しなければならず無駄である。   When the continuous molding is stopped, the intermediate molded product remaining in the cavity is not a completed molded product, and must be discarded.

本発明は、上述した問題に鑑みてなされたものであり、ロータリ射出成形機の連続成形を成形原料、時間及び労力の無駄なくして立上げ及び終了させることができる制御方法を提供することを目的とする。   The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a control method capable of starting and terminating continuous molding of a rotary injection molding machine without waste of molding raw materials, time and labor. And

上記目的を達成するためになされた請求項１に記載の発明は、Ｎ回の成形工程を有するロータリ射出成形機による連続成形を立上げるときの制御方法であって、立上げ信号が発信された後の最初の成形工程では、１次成形のキャビティのみ射出充填を実行し、２次成形からＮ次成形の各キャビティへの射出充填を停止し、回転盤を回転させて次回の成形工程へ移行する度毎に、射出充填を実行するキャビティを２次成形からＮ次成形まで順次に追加し、立上げ信号が発信された後のＮ回以降の成形工程では、全てのキャビティを射出充填して連続成形を立上げることを特徴とする。   The invention according to claim 1, which has been made to achieve the above object, is a control method for starting up continuous molding by a rotary injection molding machine having N molding steps, and a startup signal is transmitted. In the subsequent first molding process, injection filling is performed only for the primary molding cavity, injection filling from the secondary molding to each cavity of the Nth molding is stopped, and the turntable is rotated to move to the next molding process. Each time, the cavity for executing injection filling is added sequentially from the secondary molding to the N-th molding, and all the cavities are injection-filled in the molding process after N times after the start-up signal is transmitted. It is characterized by starting up continuous molding.

この構成によれば、中間成形品をキャビティへインサートしたり射出装置での溶融樹脂の計量を中間成形品の容積に相当する分増量したりする必要がないので、労力、時間及び原料樹脂を浪費せず極めて経済的且つ効率的にロータリ射出成形機を使用できるという優れた効果を奏する。   According to this configuration, there is no need to insert the intermediate molded product into the cavity or increase the amount of molten resin in the injection device by an amount corresponding to the volume of the intermediate molded product. Without being able to use the rotary injection molding machine extremely economically and efficiently.

請求項２に記載の発明は、Ｎ回の成形工程を有するロータリ射出成形機による連続成形を終了するときの制御方法であって、終了信号が発信された成形工程に続く成形工程では、１次成形のキャビティのみ射出充填を停止し、２次成形からＮ次成形の各キャビティへの射出充填を実行し、回転盤を回転させて次回の成形工程へ移行する度毎に、射出充填を停止するキャビティを２次成形からＮ次成形まで順次に追加し、その後、全てのキャビティの射出充填を停止して連続成形を終了することを特徴とする。   The invention according to claim 2 is a control method for ending the continuous molding by the rotary injection molding machine having N molding processes, and in the molding process following the molding process in which the end signal is transmitted, Injection filling is stopped only for the molding cavity, injection filling is performed from the secondary molding to each of the N-order molding cavities, and the injection filling is stopped each time the turntable is rotated to move to the next molding process. The cavities are sequentially added from the secondary molding to the N-order molding, and thereafter, injection filling of all the cavities is stopped and the continuous molding is finished.

この構成によれば、連続成形を停止するときに最終次の一次前までの成形工程における中間成形品がキャビティ内に残存しないとともに、その中間成形品を取り除く作業が不要となるので、労力、時間及び原料樹脂を浪費せず極めて経済的且つ効率的にロータリ射出成形機を使用できるという優れた効果を奏する。   According to this configuration, when the continuous molding is stopped, the intermediate molded product in the molding process until the final primary is not left in the cavity, and the work for removing the intermediate molded product is not required. In addition, there is an excellent effect that the rotary injection molding machine can be used extremely economically and efficiently without wasting raw material resin.

請求項３に記載の発明は、前記キャビティへの射出充填を前記実行又は前記停止する制御が、ホットランナを開閉させることにより行われることを特徴とする。   The invention according to claim 3 is characterized in that the control for executing or stopping injection filling into the cavity is performed by opening and closing a hot runner.

この構成によれば、一の射出装置から複数のキャビティへの射出充填を可能にするので、経済性に優れたロータリ射出成形機とすることができる。   According to this configuration, since injection filling from a single injection device into a plurality of cavities is possible, a rotary injection molding machine with excellent economic efficiency can be obtained.

本発明を実施するロータリ射出成形機の構成を示す部分断面の側面図である。It is a side view of the partial cross section which shows the structure of the rotary injection molding machine which implements this invention. Ｎ＝８のときの各キャビティの状態を示す断面図である。It is sectional drawing which shows the state of each cavity when N = 8. 連続成形を立上げるときの本発明の制御内容を示す流れ図である。It is a flowchart which shows the control content of this invention when starting continuous molding. 連続成形を停止するときの本発明の制御内容を示す流れ図である。It is a flowchart which shows the control content of this invention when stopping a continuous molding.

以下、本発明を具体化した一実施形態について、図面を参照しつつ説明する。   Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

図１には、本発明を実施するロータリ射出成形機の一例を示す。ロータリ射出成形機１は、型締装置２、回転装置５、雌雄金型４、射出装置３及び制御装置２０からなる。   FIG. 1 shows an example of a rotary injection molding machine for carrying out the present invention. The rotary injection molding machine 1 includes a mold clamping device 2, a rotation device 5, a male and female mold 4, an injection device 3, and a control device 20.

型締装置２は、圧締・開閉機構（図示しない）と、可動盤１０と、可動盤１０に回動自在に取付けられた回転盤９と、回転盤９に対向配置された固定盤１１と、固定盤１１と圧締・開閉機構に固着されたタイバ１２とからなる。型締装置２は、圧締・開閉機構の作用によって、雌雄金型４を取付ける固定盤１１及び回転盤９並びにタイバ１２を摺動する可動盤１０を介して雌雄金型４を圧締するとともに、図１に示すような型開き状態にさせるものである。型締装置２の圧締・開閉機構は、油圧シリンダ装置やトグル装置等の公知の機構が採用される。なお、型締装置２は横型として例示したが、縦型であってもよい。   The mold clamping device 2 includes a pressure-clamping / opening / closing mechanism (not shown), a movable platen 10, a rotating plate 9 rotatably attached to the movable platen 10, and a fixed platen 11 disposed to face the rotating plate 9. The fixed platen 11 and the tie bar 12 fixed to the pressing / opening / closing mechanism. The mold clamping device 2 clamps the male and female molds 4 through a movable plate 10 that slides on a fixed plate 11 and a rotating plate 9 and a tie bar 12 for mounting the male and female dies 4 by the action of a clamping and opening / closing mechanism. The mold is opened as shown in FIG. A known mechanism such as a hydraulic cylinder device or a toggle device is employed as the pressure clamping / opening / closing mechanism of the mold clamping device 2. Although the mold clamping device 2 is illustrated as a horizontal type, it may be a vertical type.

回転装置５は、回転盤９、サーボモータ６、プーリ７及びベルト８からなり、回転盤９を任意の回転角度に回動させ位置決めするものである。回転装置５には、位置決めの回転角度を任意且つ精確に得るため、サーボモータ６が好ましく採用されるが、誘導電動機や直動シリンダの他カム等の機構によるものであってもよい。回転盤９及び回転装置５は、可動盤１０に設けられるように例示したが、固定盤１１に設けてもよい。   The rotating device 5 includes a rotating disk 9, a servo motor 6, a pulley 7, and a belt 8. The rotating apparatus 5 rotates and positions the rotating disk 9 at an arbitrary rotation angle. The rotating device 5 preferably employs a servo motor 6 in order to obtain a positioning rotation angle arbitrarily and accurately, but it may be based on a mechanism such as an induction motor or a direct acting cylinder other than a cam. The rotating plate 9 and the rotating device 5 are illustrated as being provided on the movable platen 10, but may be provided on the fixed platen 11.

雌雄金型４は、８個のキャビティ凹部１４ａ〜１４ｈを有する雌型板１３と、８個のキャビティ凸部１５ａ〜１５ｈを有する雄型板１６とからなる。キャビティ凹部１４ａ〜１４ｈは、図２に示すように、凹部の深さは同一に形成されて、回転盤９の回転円周上等間隔となるように配設されている。キャビティ凸部１５ａ〜１５ｈは、図２に示すように、１５ａから１５ｈへ順次に突出部の高さが低くなるように形成され、キャビティ凹部１４ａ〜１４ｈと同様に円周上等間隔となるように配設されている。そのため、キャビティ凹部１４ａ〜１４ｈとキャビティ凸部１５ａ〜１５ｈとは、回転装置５と型締装置２の作動に基づき、それらのどの組み合わせにおいても型合わせ可能となるのである。そして、図２の（ａ）〜（ｈ）に示すように、キャビティ容積が回転装置５の回転方向に向けて順次大きくなるようなキャビティ１８ａ〜１８ｈが形成される（すなわち、本実施形態において金型キャビティの数Ｎは８である）。さらに言えば、キャビティ１８ａ〜１８ｈは、キャビティ容積が最小のもの（１次成形に相当）から円周上一方向に順次大きくなり、キャビティ容積が最大のもの（Ｎ次成形に相当）からキャビティ容積が最小のものへと併設されるように設けられている。キャビティ１８ａ〜１８ｈには、雌雄金型４の型合わせ面に連通するゲート２４が設けられている。ゲート２４と射出装置３のノズル１９との間の溶融樹脂通路には、ホットランナ１７が介在する。ホットランナ１７は、電気ヒータ等を有しており、制御装置２０からの通電量を制御することにより溶融樹脂の通路を開閉することができる。なお、型締装置２や回転装置５の異なる形態に応じて、雌雄金型４の取付部材やホットランナ等の埋設位置が変化するのは当然なことである。   The male and female mold 4 includes a female mold plate 13 having eight cavity concave portions 14a to 14h and a male mold plate 16 having eight cavity convex portions 15a to 15h. As shown in FIG. 2, the cavity recesses 14 a to 14 h are formed so that the recesses have the same depth and are equally spaced on the rotation circumference of the rotating disk 9. As shown in FIG. 2, the cavity convex portions 15 a to 15 h are formed so that the height of the projecting portions sequentially decreases from 15 a to 15 h, and are equally spaced on the circumference like the cavity concave portions 14 a to 14 h. It is arranged. Therefore, the cavity concave portions 14a to 14h and the cavity convex portions 15a to 15h can be mold-matched in any combination based on the operation of the rotating device 5 and the mold clamping device 2. Then, as shown in FIGS. 2A to 2H, cavities 18a to 18h are formed so that the cavity volume sequentially increases in the rotation direction of the rotating device 5 (that is, in this embodiment, gold The number N of mold cavities is 8). Furthermore, the cavities 18a to 18h are sequentially increased from one having the smallest cavity volume (corresponding to the primary molding) to one direction on the circumference, and from the one having the largest cavity volume (corresponding to the Nth molding) to the cavity volume. Is provided to be attached to the smallest. The cavities 18 a to 18 h are provided with gates 24 that communicate with the die-mating surfaces of the male and female dies 4. A hot runner 17 is interposed in the molten resin passage between the gate 24 and the nozzle 19 of the injection device 3. The hot runner 17 has an electric heater and the like, and can open and close the molten resin passage by controlling the amount of current supplied from the control device 20. In addition, it is natural that the mounting positions of the male and female molds 4 and the embedded positions of the hot runner and the like change depending on different forms of the mold clamping device 2 and the rotating device 5.

このように、一の雌雄金型４に８個のキャビティ１８ａ〜１８ｈを設けた実施例を図１及び図２に基づいて説明した。これに対し、一の金型キャビティを有する複数の雌雄金型の雌金型をキャビティ凹部又はキャビティ凸部が円周上等間隔となるように回転盤上に配設してもよい。この構成は、比較的大型の多色成形品又は多層成形品を成形する場合に有効であり、型締装置は縦型となることが多い。   Thus, the Example which provided the eight cavity 18a-18h in the one male and female metal mold | die 4 was demonstrated based on FIG.1 and FIG.2. On the other hand, a plurality of male and female molds having a single mold cavity may be arranged on the turntable so that the cavity recesses or the cavity protrusions are equally spaced on the circumference. This configuration is effective when molding a relatively large multicolor molded product or multilayer molded product, and the mold clamping device is often a vertical type.

射出装置３は、スクリュ式又はプランジャ式等の公知の機構を有し、樹脂原料を可塑化して生成した溶融樹脂を型合わせし圧締された雌雄金型４へノズル１９を介して射出し、キャビティ１８ａ〜１８ｈを充填させるものである。射出装置３は、図１に示すように、複数のキャビティに対して一基設けることがコスト的に有利であるが、製品の付加価値向上や射出充填の制御性・成形性向上を図るためあるいは多色成形を行うときには複数設けることもある。   The injection device 3 has a known mechanism such as a screw type or a plunger type, and injects the molten resin produced by plasticizing the resin raw material through the nozzle 19 into the male and female molds 4 that are matched and pressed. The cavities 18a to 18h are filled. As shown in FIG. 1, it is advantageous in terms of cost to provide a single injection device 3 for a plurality of cavities. However, in order to improve the added value of the product and to improve the controllability / moldability of injection filling, or When performing multicolor molding, a plurality of them may be provided.

制御装置２０は、マイクロプロセッサに基づいて、ロータリ射出成形機１の型締装置２、回転装置５及び射出装置３におけるアクチュエータの操作やシーケンスを電気信号により制御し実行させるものである。さらに、制御装置２０は、ホットランナ１７及び射出装置３に備える加熱筒の温度制御も包含する。   The control device 20 controls and executes operations and sequences of actuators in the mold clamping device 2, the rotation device 5, and the injection device 3 of the rotary injection molding machine 1 based on a microprocessor. Further, the control device 20 includes temperature control of a heating cylinder provided in the hot runner 17 and the injection device 3.

次に、このロータリ射出成形機１を用いた成形方法とその制御方法を多層成形に例をとり説明する。   Next, a molding method using the rotary injection molding machine 1 and its control method will be described by taking an example of multilayer molding.

Ｎ＝８であって、キャビティを８個、成形工程を８回有する図１に示すロータリ射出成形機１において、型締装置２で圧締された雌雄金型４に射出装置３から溶融樹脂が射出され、各キャビティ１８ａ〜１８ｈは、図２において黒の塗潰しで示すように、その全面にわたって流動する溶融樹脂でそれぞれが同時に充填される。その後、（ａ）の１次成形で成形された中間成形品は、図１に示すように、キャビティ凹部１４ａに附着したまま型開きされ、雌型板１３が（３６０／８）度時計廻りに回転し再型閉じすることにより、キャビティ凹部１４ｂに相当する位置に移動して（ｂ）の２次成形に備える。同様にして、（ｂ）の中間成形品は（ｃ）へ、・・・、（ｇ）の中間成形品は（ｈ）へと順次移送される。８回移送されて（ｈ）の８次成形で成形された成形品は完成品であり、図１に示すように、ホットランナ１７に繋がっていたゲート２４部分が切断されて型開きする。そして、成形品は図示しない突出手段でキャビティ凸部１４ｈから離型され取り出される。すなわち、雌雄金型４が圧締されているときに射出装置３から全てのキャビティ１８ａ〜１８ｈへ溶融樹脂を射出し、雌型板１３を雄型板１６から離隔させ、回転装置５で回転盤９をキャビティの容積が順次大きくなるような方向へ（３６０／８）度回転させる一連の成形工程を８回繰り返すことにより一の多層成形品を成形するのである。そして、（ｈ）で成形された完成品としての成形品が取出された後の回転装置５の回転は、次の一連の成形工程への移行となるものであり、中間成形品の移送と同時に実行されるのであるから、その回転方向は前の成形工程と同じく金型キャビティの容積が順次大きくなるような方向である。すなわち、回転装置５は連続成形中常に同一回転方向にのみ回転するのである。   In the rotary injection molding machine 1 shown in FIG. 1 having N = 8, 8 cavities, and 8 molding processes, molten resin is injected from the injection device 3 to the male and female molds 4 clamped by the mold clamping device 2. Each of the cavities 18a to 18h is injected and filled simultaneously with a molten resin that flows over the entire surface, as shown by black paint in FIG. Thereafter, as shown in FIG. 1, the intermediate molded product formed by the primary molding of (a) is opened while being attached to the cavity recess 14a, and the female mold plate 13 is rotated (360/8) degrees clockwise. By rotating and re-molding, it moves to a position corresponding to the cavity recess 14b and prepares for the secondary molding of (b). Similarly, the intermediate molded product of (b) is sequentially transferred to (c), and the intermediate molded product of (g) is sequentially transferred to (h). The molded product which has been transferred eight times and molded by the eighth molding of (h) is a finished product, and as shown in FIG. 1, the gate 24 portion connected to the hot runner 17 is cut and the mold is opened. Then, the molded product is released from the cavity convex portion 14h by a protruding means (not shown) and taken out. That is, when the male and female molds 4 are pressed, molten resin is injected from the injection device 3 into all the cavities 18 a to 18 h, the female plate 13 is separated from the male plate 16, and the rotating device 5 rotates the rotating disk. One multilayer molded article is molded by repeating a series of molding processes in which 9 is rotated (360/8) degrees in the direction in which the volume of the cavity is sequentially increased. Then, the rotation of the rotating device 5 after the molded product as the finished product molded in (h) is taken out is a transition to the next series of molding steps, and simultaneously with the transfer of the intermediate molded product. Since it is executed, the direction of rotation is such that the volume of the mold cavity increases sequentially as in the previous molding step. That is, the rotating device 5 always rotates only in the same rotational direction during continuous molding.

このような、多層成形を立上げて連続成形を行うときの成形・制御方法について、Ｎ個のキャビティとＮ回の成形工程を有するロータリ射出成形機における本発明の制御内容を示す図３、及び、Ｎ＝８のときのキャビティの状態を示す図２に基づいて説明する。   FIG. 3 shows the contents of control of the present invention in a rotary injection molding machine having N cavities and N molding steps, for a molding / control method when starting multilayer molding and performing continuous molding, and The cavity state when N = 8 will be described with reference to FIG.

ロータリ射出成形機１を運転開始すると制御装置２０から立上げ信号が発信される（Ｓ１）。立上げ信号に基づいて、制御装置２０はキャビティ１８ａに連通するホットランナ１７を開いて、１次成形としてのキャビティ１８ａへの射出充填を実行するとともに、キャビティ１８ｂ〜１８ｈに連通する各ホットランナ１７を閉じて、２次成形から８次成形としての各キャビティ１８ｂ〜１８ｈへの射出充填を停止する（Ｓ２）。回転盤９が（３６０／Ｎ）度回転して次回の成形工程に移行したか否かを判断し（Ｓ３）、次回の成形工程に移行したときには、前回の成形工程で射出充填したキャビティに加えてその次のキャビティ（キャビティ１８ｂ）にも射出充填すべくホットランナ１７を開いて１次及び２次成形を実行する（Ｓ４）。Ｓ３及びＳ４の制御を成形工程が８になるまで繰り返す（Ｓ５）。成形工程が８に到達したときには、各キャビティそれぞれに連通する各ホットランナ１７を開いて全てのキャビティへ溶融樹脂を射出充填する（Ｓ６）。   When operation of the rotary injection molding machine 1 is started, a startup signal is transmitted from the control device 20 (S1). Based on the start-up signal, the control device 20 opens the hot runner 17 communicating with the cavity 18a, performs injection filling into the cavity 18a as the primary molding, and each hot runner 17 communicated with the cavities 18b-18h. Is closed, and injection filling from the secondary molding to the respective cavities 18b to 18h as the eighth molding is stopped (S2). It is judged whether or not the turntable 9 has been rotated by (360 / N) degrees to shift to the next molding step (S3). When the next molding step is started, in addition to the cavity filled and injected in the previous molding step The hot runner 17 is opened to perform injection filling into the next cavity (cavity 18b), and primary and secondary molding are performed (S4). The control of S3 and S4 is repeated until the molding process reaches 8 (S5). When the molding process reaches 8, each hot runner 17 communicating with each cavity is opened and molten resin is injected and filled into all cavities (S6).

次に、多層成形の連続成形を終了するときの成形・制御方法について、Ｎ個のキャビティとＮ回の成形工程を有するロータリ射出成形機における本発明の制御内容を示す図４、及び、Ｎ＝８のときのキャビティの状態を示す図２に基づいて説明する。   Next, with respect to the molding / control method for ending the continuous molding of multilayer molding, FIG. 4 showing the control content of the present invention in a rotary injection molding machine having N cavities and N molding steps, and N = A description will be given with reference to FIG.

ロータリ射出成形機１の連続成形を終了させるべく、制御装置２０から終了信号が発信される（Ｓ１１）。制御装置２０は、成形実施中に終了信号が発せられた成形工程に続く成形工程において、キャビティ１８ａに連通するホットランナ１７を閉じて、１次成形としてのキャビティ１８ａへの射出充填を停止するとともに、キャビティ１８ｂ〜１８ｈに連通する各ホットランナ１７を開いて、２次成形から８次成形としての各キャビティ１８ｂ〜１８ｈへの射出充填を実行する（Ｓ１２）。回転盤９が（３６０／Ｎ）度回転して次回の成形工程に移行したか否かを判断し（Ｓ１３）、次回の成形工程に移行したときには、前回の成形工程で射出充填を停止したキャビティに加えてその次のキャビティ（キャビティ１８ｂ）に対しても射出充填を停止すべくホットランナ１７を閉じて１次及び２次成形を停止する（Ｓ１４）。Ｓ１３及びＳ１４の制御を成形工程が８になるまで繰り返す（Ｓ１５）。成形工程が８に到達したときには、各キャビティそれぞれに連通する各ホットランナ１７を閉じるか射出装置３の射出動作を停止させて、全てのキャビティへの溶融樹脂の射出充填を停止して連続成形が終了する（Ｓ１６）。   In order to end the continuous molding of the rotary injection molding machine 1, an end signal is transmitted from the control device 20 (S11). The control device 20 closes the hot runner 17 communicating with the cavity 18a in the molding process subsequent to the molding process in which an end signal is issued during molding, and stops injection filling into the cavity 18a as the primary molding. Then, the hot runners 17 communicating with the cavities 18b to 18h are opened, and injection filling from the secondary molding to the cavities 18b to 18h as the eighth molding is executed (S12). It is determined whether or not the turntable 9 has been rotated by (360 / N) degrees to shift to the next molding step (S13), and when it has shifted to the next molding step, the injection filling is stopped in the previous molding step. In addition, the hot runner 17 is closed to stop the injection filling for the next cavity (cavity 18b), and the primary and secondary moldings are stopped (S14). The control of S13 and S14 is repeated until the molding process reaches 8 (S15). When the molding process reaches 8, the hot runners 17 communicating with the respective cavities are closed or the injection operation of the injection device 3 is stopped, and the injection filling of the molten resin into all the cavities is stopped to perform continuous molding. The process ends (S16).

以上詳述したことから明らかなように、本実施形態のロータリ射出成形機１による連続成形を立上げるときの制御方法によれば、立上げ信号が発信された後の最初の成形工程では、１次成形のキャビティ１８ａのみ射出充填を実行し、２次成形からＮ次成形の各キャビティ１８ｂ〜１８ｈへの射出充填を停止し、回転盤９を（３６０／Ｎ）度回転させて次回の成形工程へ移行する度毎に、射出充填を実行するキャビティを２次成形からＮ次成形まで順次に追加し、立上げ信号が発信された後のＮ回以降の成形工程では、全てのキャビティを射出充填して連続成形を立上げる。そのため、中間成形品をキャビティへインサートしたり射出装置での溶融樹脂の計量を中間成形品の容積に相当する分増量したりする必要がないので、労力、時間及び原料樹脂を浪費せず極めて経済的且つ効率的にロータリ射出成形機を使用できるという優れた効果を奏する。   As is clear from the above detailed description, according to the control method for starting up the continuous molding by the rotary injection molding machine 1 of the present embodiment, in the first molding step after the startup signal is transmitted, Only the next molding cavity 18a is injection filled, the injection filling from the second molding to the Nth molding cavities 18b to 18h is stopped, and the turntable 9 is rotated by (360 / N) degrees for the next molding process. Each time a transition is made, a cavity for performing injection filling is added sequentially from secondary molding to N-th molding, and all cavities are injection-filled in the molding process after N times after the start-up signal is transmitted. Then start up continuous molding. Therefore, there is no need to insert the intermediate molded product into the cavity or increase the amount of molten resin in the injection device corresponding to the volume of the intermediate molded product. An excellent effect is achieved that a rotary injection molding machine can be used efficiently and efficiently.

また、本実施形態のロータリ射出成形機１による連続成形を終了させるときの制御方法によれば、終了信号が発信された成形工程に続く成形工程では、１次成形のキャビティ１８ａのみ射出充填を停止し、２次成形からＮ次成形の各キャビティ１８ｂ〜１８ｈへの射出充填を実行し、回転盤９を（３６０／Ｎ）度回転させて次回の成形工程へ移行する度毎に、射出充填を実行するキャビティを２次成形からＮ次成形まで順次に追加し、その後、全てのキャビティの射出充填を停止して連続成形を終了する。そのため、連続成形を停止するときに最終次の一次前までの成形工程における中間成形品がキャビティ内に残存しないとともに、その中間成形品を取り除く作業が不要となるので、労力、時間及び原料樹脂を浪費せず極めて経済的且つ効率的にロータリ射出成形機を使用できるという優れた効果を奏する。   Further, according to the control method for terminating the continuous molding by the rotary injection molding machine 1 of the present embodiment, only the primary molding cavity 18a is stopped in the injection process in the molding process following the molding process in which the end signal is transmitted. Then, injection filling is performed from the secondary molding to each of the cavities 18b to 18h of the Nth molding, and each time the rotating disk 9 is rotated by (360 / N) to shift to the next molding process, the injection filling is performed. The cavities to be executed are sequentially added from the secondary molding to the N-th molding, and then the injection filling of all the cavities is stopped to finish the continuous molding. For this reason, when continuous molding is stopped, the intermediate molded product in the molding process until the final primary is not left in the cavity, and the operation of removing the intermediate molded product is not required. There is an excellent effect that the rotary injection molding machine can be used extremely economically and efficiently without being wasted.

尚、本発明は、上述した実施の形態に限定されるものではなく、本発明の主旨を逸脱しない範囲で種々に変更を施すことが可能である。例えば、多層成形に例をとって説明した本発明は、多色成形にも適用可能であることは言うまでもない。また、一の射出装置から複数の各キャビティへホットランナを介して射出充填する態様を説明したが、一のキャビティに一の射出装置を対応させたものを複数備える態様であってもよい。この場合、キャビティへの射出充填を実行又は停止する制御は、射出装置の射出制御により行う。さらに、本実施形態では、回転盤を一方方向へのみ回転させるように説明したが、成形工程毎に回転盤を反転させるようにしてもよい。   Note that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the gist of the present invention. For example, it goes without saying that the present invention described by taking an example of multilayer molding is also applicable to multicolor molding. Moreover, although the aspect which injects and fills each cavity from one injection apparatus via a hot runner was demonstrated, the aspect provided with two or more what made one injection apparatus respond | correspond to one cavity may be sufficient. In this case, control for executing or stopping injection filling into the cavity is performed by injection control of the injection device. Furthermore, in the present embodiment, it has been described that the rotating disk is rotated only in one direction. However, the rotating disk may be reversed every molding process.

１ ロータリ射出成形機
９ 回転盤
１７ ホットランナ
１８ａ〜１８ｈ キャビティ
２０ 制御装置 DESCRIPTION OF SYMBOLS 1 Rotary injection molding machine 9 Turntable 17 Hot runner 18a-18h Cavity 20 Control apparatus

Claims (3)

Ｎ回の成形工程を有するロータリ射出成形機による連続成形を立上げるときの制御方法であって、
立上げ信号が発信された後の最初の成形工程では、１次成形のキャビティのみ射出充填を実行し、２次成形からＮ次成形の各キャビティへの射出充填を停止し、
回転盤を回転させて次回の成形工程へ移行する度毎に、
射出充填を実行するキャビティを２次成形からＮ次成形まで順次に追加し、
立上げ信号が発信された後のＮ回以降の成形工程では、全てのキャビティを射出充填して連続成形を立上げることを特徴とするロータリ射出成形機の制御方法。 A control method for starting up continuous molding by a rotary injection molding machine having N molding steps,
In the first molding step after the start-up signal is transmitted, injection filling is performed only on the primary molding cavity, and injection filling from the secondary molding to each cavity of the Nth molding is stopped.
Every time the turntable is rotated to move to the next molding process,
Cavities that perform injection filling are added sequentially from secondary molding to N-order molding,
A control method for a rotary injection molding machine, wherein in a molding process after N times after a startup signal is transmitted, continuous molding is started by injection-filling all cavities. Ｎ回の成形工程を有するロータリ射出成形機による連続成形を終了するときの制御方法であって、
終了信号が発信された成形工程に続く成形工程では、１次成形のキャビティのみ射出充填を停止し、２次成形からＮ次成形の各キャビティへの射出充填を実行し、
回転盤を回転させて次回の成形工程へ移行する度毎に、
射出充填を停止するキャビティを２次成形からＮ次成形まで順次に追加し、
その後、全てのキャビティの射出充填を停止して連続成形を終了することを特徴とするロータリ射出成形機の制御方法。 A control method for terminating continuous molding by a rotary injection molding machine having N molding steps,
In the molding process following the molding process in which the end signal is transmitted, the injection filling is stopped only for the primary molding cavity, and the injection filling from the secondary molding to each cavity of the N-th molding is executed.
Every time the turntable is rotated to move to the next molding process,
Add a cavity to stop injection filling sequentially from secondary molding to N-shaped molding,
Thereafter, the injection filling of all the cavities is stopped and the continuous molding is terminated, and the control method of the rotary injection molding machine is characterized. 前記キャビティへの射出充填を前記実行又は前記停止する制御は、ホットランナを開閉させることにより行われることを特徴とする請求項１又は２に記載のロータリ射出成形機の制御方法。   The control method for a rotary injection molding machine according to claim 1 or 2, wherein the control for executing or stopping injection filling into the cavity is performed by opening and closing a hot runner.
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KR20180097200A (en) * 2017-02-22 2018-08-31 에이테크솔루션(주) Manufacturing mold using a die slide injection for transparent product having a thick section and manufacturing method thereof
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Publication number Priority date Publication date Assignee Title
CN103692609A (en) * 2013-12-31 2014-04-02 浙江荣信模具塑料有限公司 Rotating injection mechanism of non-slip mat injection mold
KR20180097200A (en) * 2017-02-22 2018-08-31 에이테크솔루션(주) Manufacturing mold using a die slide injection for transparent product having a thick section and manufacturing method thereof
KR102007329B1 (en) 2017-02-22 2019-08-07 에이테크솔루션(주) Manufacturing mold using a die slide injection for transparent product having a thick section and manufacturing method thereof
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