JP4626870B2 - Drive unit for injection molding machine - Google Patents

Drive unit for injection molding machine Download PDF

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JP4626870B2
JP4626870B2 JP2005141709A JP2005141709A JP4626870B2 JP 4626870 B2 JP4626870 B2 JP 4626870B2 JP 2005141709 A JP2005141709 A JP 2005141709A JP 2005141709 A JP2005141709 A JP 2005141709A JP 4626870 B2 JP4626870 B2 JP 4626870B2
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transmission timing
timing belt
pulley
molding machine
ball screw
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JP2006315343A (en
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亘 佐藤
龍男 関野
真司 村山
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Niigata Machine Techno Co Ltd
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Description

本発明は、例えば溶融樹脂を金型の成形キャビティに射出する射出成形機の駆動装置に関する。   The present invention relates to a drive device for an injection molding machine that injects, for example, molten resin into a molding cavity of a mold.

従来、射出成形機の駆動装置として、ボールねじ機構のねじ軸に伝動タイミングプーリが付設され、この伝動タイミングプーリに伝動タイミングベルトを巻き掛け、さらに伝動タイミングベルトを電動機で駆動させる構成からなる駆動機構が複数備えられ、これらの駆動機構によって、直線的に移動可能に設けられた可動部材を駆動させる駆動装置がある。この駆動装置には、複数の駆動機構にそれぞれ備えられた各ボールねじ機構のねじ軸の回転を同期させる同期タイミングベルトが備えられており、この同期タイミングベルトは、各ボールねじ機構のねじ軸にそれぞれ付設された同期タイミングプーリに巻き掛けられている。   2. Description of the Related Art Conventionally, as a drive device for an injection molding machine, a drive mechanism comprising a structure in which a transmission timing pulley is attached to a screw shaft of a ball screw mechanism, a transmission timing belt is wound around the transmission timing pulley, and the transmission timing belt is driven by an electric motor. There is a drive device that drives a movable member that is linearly movable by these drive mechanisms. This drive device is provided with a synchronous timing belt that synchronizes the rotation of the screw shaft of each ball screw mechanism provided in each of the plurality of drive mechanisms, and this synchronous timing belt is attached to the screw shaft of each ball screw mechanism. Each is wound around an associated synchronous timing pulley.

上記した駆動機構において、伝動タイミングベルトが巻き掛けられる伝動タイミングプーリと同期タイミングベルトが巻き掛けられる同期タイミングプーリとは、別々のプーリー部材であり、同一のねじ軸の端部に重なった状態でそれぞれ付設されている。このとき、同期タイミングプーリの方が伝動タイミングプーリよりもねじ軸の先端方向に配置されており、駆動装置を側方からみて、同期タイミングプーリが手前に、伝動タイミングプーリが同期タイミングプーリの奥に配置されている。また、駆動装置全体の慣性モーメントを小さくするとともに、伝動タイミングベルトの取付や交換の作業をし易くするため、同期タイミングプーリの方が伝動タイミングプーリよりも小径になっている。（例えば、特許文献１参照。）。   In the drive mechanism described above, the transmission timing pulley around which the transmission timing belt is wound and the synchronization timing pulley around which the synchronization timing belt is wound are separate pulley members, each in a state of being overlapped with the end of the same screw shaft. It is attached. At this time, the synchronous timing pulley is arranged closer to the tip of the screw shaft than the transmission timing pulley, and when viewed from the side, the synchronous timing pulley is at the front and the transmission timing pulley is at the back of the synchronous timing pulley. Has been placed. In addition, the synchronous timing pulley has a smaller diameter than the transmission timing pulley in order to reduce the moment of inertia of the entire driving device and facilitate the mounting and replacement work of the transmission timing belt. (For example, refer to Patent Document 1).

ところで、歯付きのタイミングベルトをプーリに巻き掛けるとき、タイミングベルトの歯とプーリの歯とが隙間無く噛合されていると、噛合された歯同士が引っ掛かりタイミングベルトとプーリとがスムーズに回転できなくなることに鑑み、噛合箇所に伝達方向の隙間（バックラッシュ）をつくる必要がある。このバックラッシュの大きさは、一般にタイミングベルトの歯のピッチに比例する。
また、電動式の射出成形機では、射出軸のスクリュ及びスクリュの先端部にある樹脂材料を一定の圧力で押圧し続ける保圧工程があり、この保圧工程中は、電動機は細かな正逆運転を繰り返している。
特許第３４９６０８９号公報 By the way, when the timing belt with teeth is wound around the pulley, if the teeth of the timing belt and the teeth of the pulley are meshed with no gap, the meshed teeth are caught and the timing belt and the pulley cannot rotate smoothly. In view of this, it is necessary to create a gap (backlash) in the transmission direction at the meshing location. The magnitude of this backlash is generally proportional to the timing belt tooth pitch.
In addition, in an electric injection molding machine, there is a pressure holding process that keeps pressing the screw at the injection shaft screw and the resin material at the tip of the screw at a constant pressure. During this pressure holding process, the motor is finely reversed. Repeated driving.
Japanese Patent No. 3496089

しかしながら、上記した従来の射出成形機の駆動装置では、伝動タイミングプーリと同期タイミングプーリとが別部品であるため、それぞれのプーリを同軸に固定する構造が複雑となり、また、それぞれのプーリの組立にも相当の手間がかかり、さらに、伝動タイミングプーリと同期タイミングプーリとの同心度の精度が悪いと安定した動力伝達ができなくなるという問題がある。
また、従来の射出成形機の駆動装置では、伝動タイミングプーリと同期タイミングプーリとが一体になったプーリを製作しようとすると、伝動タイミングプーリと同期タイミングプーリとの直径が異なっているため、切削工具の逃げがなく、非常に加工し難いという問題がある。 However, in the above-described conventional injection molding machine drive device, the transmission timing pulley and the synchronous timing pulley are separate parts, so the structure for fixing each pulley coaxially becomes complicated, and the assembly of each pulley is also difficult. However, there is a problem that stable power transmission cannot be performed if the accuracy of the concentricity between the transmission timing pulley and the synchronous timing pulley is poor.
In addition, in the conventional injection molding machine drive device, when trying to manufacture a pulley in which the transmission timing pulley and the synchronous timing pulley are integrated, the diameters of the transmission timing pulley and the synchronous timing pulley are different. There is a problem that it is very difficult to process.

さらに、上記した従来の射出成形機の駆動装置のように、同期タイミングプーリが伝動タイミングプーリより小径であると、同期タイミングベルトの伝達能力を向上させるため、伝動タイミングプーリよりも大きいピッチの同期タイミングプーリが使用される場合が多く、この場合、同期タイミングプーリ上のバックラッシュが大きくなる。また、伝動タイミングプーリと同じピッチの同期タイミングプーリを使用した場合は、同期タイミングプーリの径をｒ、同期タイミングプーリ上のバックラッシュをδ、伝動タイミングプーリの径をＲとすると、伝動タイミングプーリ上のバックラッシュΔは、Ｒ／ｒ×δとなり、伝動タイミングプーリ上のバックラッシュが大きくなる。つまり、上記した何れの場合も、何れか一方のプーリ上のバックラッシュが大きくなり、正確な制御の阻害要因となるという問題がある。   Furthermore, if the synchronous timing pulley has a smaller diameter than the transmission timing pulley as in the conventional injection molding machine drive device described above, the synchronous timing belt has a larger synchronization timing than the transmission timing pulley in order to improve the transmission capability of the synchronous timing belt. A pulley is often used, and in this case, backlash on the synchronous timing pulley is increased. When a synchronous timing pulley having the same pitch as the transmission timing pulley is used, if the synchronous timing pulley diameter is r, the backlash on the synchronous timing pulley is δ, and the transmission timing pulley diameter is R, The backlash Δ is R / r × δ, and the backlash on the transmission timing pulley increases. That is, in any of the cases described above, there is a problem that backlash on one of the pulleys becomes large, which becomes an obstacle to accurate control.

本発明は、上記した従来の問題が考慮されたものであり、装置の構成を単純化して装置の組立を容易にするとともに、安定した伝達を可能にすることができ、さらに加工容易な部品によって構成することでコストダウンを図ることができる射出成形機の駆動装置を提供することを目的としている。また、保圧工程中にずれが生じず、正確な制御を行うことができる射出成形機の駆動装置を提供することを目的としている。   The present invention takes the above-described conventional problems into consideration, simplifies the configuration of the apparatus to facilitate the assembly of the apparatus, enables stable transmission, and further facilitates processing. It aims at providing the drive device of the injection molding machine which can aim at cost reduction by comprising. It is another object of the present invention to provide a drive device for an injection molding machine that can perform accurate control without causing a deviation during the pressure holding process.

請求項１記載の発明は、ボールねじ機構のねじ軸に付設された伝動タイミングプーリに、電動機により駆動される伝動タイミングベルトが巻き掛けられ、前記電動機による回転運動を前記ボールねじ機構によって直線運動に変換する構成からなる駆動機構が複数備えられているとともに、該複数の駆動機構にそれぞれ備えられた各ボールねじ機構のねじ軸の回転を同期させる同期タイミングベルトが備えられ、前記複数の駆動機構にそれぞれ備えられた各ボールねじ機構によって可動部材を直線的に駆動させる射出成形機の駆動装置において、前記複数の駆動機構にそれぞれ備えられた各伝動タイミングプーリは同一ピッチ、同一外径で一体形成された二つのプーリを備えており、該二つのプーリに前記電動タイミングベルトと前記同期タイミングベルトがそれぞれ巻き掛けられ、前記同期タイミングベルトは、電動機に接続されておらず、前記各伝動タイミングプーリの間に巻回されていることを特徴としている。 According to the first aspect of the present invention, a transmission timing belt driven by an electric motor is wound around a transmission timing pulley attached to a screw shaft of the ball screw mechanism, and the rotary motion by the electric motor is converted into a linear motion by the ball screw mechanism. A plurality of drive mechanisms configured to convert are provided, and a synchronization timing belt for synchronizing the rotation of the screw shaft of each ball screw mechanism provided in each of the plurality of drive mechanisms is provided. In the drive device of the injection molding machine that linearly drives the movable member by each provided ball screw mechanism, each transmission timing pulley provided in each of the plurality of drive mechanisms is integrally formed with the same pitch and the same outer diameter. equipped with two pulleys, the electric timing belt and the synchronous tie to the two pulleys Nguberuto is wound, respectively, the synchronization timing belt is not connected to the motor, is characterized in that said is wound between each transmission timing pulleys.

このような特徴により、伝動タイミングプーリは、伝動タイミングベルトを巻き掛けるプーリと同期タイミングベルトを巻き掛けるプーリとが一体になったものとなり、同期タイミングベルトを巻き掛けるプーリを別途設ける必要がないとともに、伝動タイミングベルトと同期タイミングベルトとが、同一ピッチ、同一径のプーリにそれぞれ巻き掛けられることになり、一方のベルト側のバックラッシュが大きくなることがない。また、双方のベルトを巻き掛けるプーリが同一径であるため、奥の方に巻き掛けられたベルトの取付や交換も可能である。   Due to such a feature, the transmission timing pulley is a combination of a pulley around which the transmission timing belt is wound and a pulley around which the synchronization timing belt is wound, and there is no need to separately provide a pulley around which the synchronization timing belt is wound. The transmission timing belt and the synchronous timing belt are respectively wound around pulleys having the same pitch and the same diameter, and backlash on one belt side does not increase. Moreover, since the pulleys around which both belts are wound have the same diameter, it is possible to attach or replace the belt wound around the back.

本発明に係る射出成形機の駆動装置によれば、装置の構成を単純化して装置の組立を容易化することができるとともに、安定した伝達を可能にすることができ、さらに容易に加工できる部品によって構成することでコストダウンを図ることができる。また、保圧工程中にずれが生じず、正確な制御を行うことができる。   According to the driving apparatus for an injection molding machine according to the present invention, the structure of the apparatus can be simplified to facilitate the assembly of the apparatus, stable transmission can be achieved, and parts that can be processed more easily. By configuring, the cost can be reduced. In addition, there is no deviation during the pressure holding process, and accurate control can be performed.

以下、本発明に係る射出成形機の駆動装置の実施の形態について、図面に基いて説明する。   DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of an injection molding machine drive device according to the present invention will be described below with reference to the drawings.

本発明に係る射出成形機の駆動装置の実施の形態を、射出装置の射出スクリューを前後進させる駆動装置に適用した例につき、添付図面を参照して説明する。図１と図２は本発明の実施の形態を示すもので、この射出成形機の駆動装置Ａは、加熱筒１を固定したフロントプレート２とリヤプレート３とを一体に結合している一対のガイドロッド４に、射出スクリュ６が回転自在に取り付けられたプッシャプレート（可動部材）７を射出スクリュ６の軸方向に移動自在に支持し、そのプッシャプレート７を一対の駆動機構３０，３０によって、射出スクリュ６と一緒に前進移動させることにより、加熱筒１のノズル（図示せず）から溶融樹脂を金型の成形キャビティに射出するようになっている。また、駆動装置Ａには、一対の駆動機構３０，３０の駆動を同期させる同期機構２２が備えられている。   The embodiment of the drive device for an injection molding machine according to the present invention will be described with reference to the accompanying drawings with respect to an example in which the drive device for moving the injection screw of the injection device back and forth is applied. FIG. 1 and FIG. 2 show an embodiment of the present invention. A driving device A of this injection molding machine is a pair of a front plate 2 and a rear plate 3 to which a heating cylinder 1 is fixed. A pusher plate (movable member) 7 having an injection screw 6 rotatably attached to the guide rod 4 is supported so as to be movable in the axial direction of the injection screw 6, and the pusher plate 7 is supported by a pair of drive mechanisms 30, 30. By moving forward together with the injection screw 6, the molten resin is injected from the nozzle (not shown) of the heating cylinder 1 into the molding cavity of the mold. Further, the driving device A includes a synchronization mechanism 22 that synchronizes the driving of the pair of driving mechanisms 30 and 30.

各駆動機構３０，３０は、リヤプレート３に固定されたサーボモータ等の電動機８，８により減速伝動装置１０，１０を介してボールねじ機構１１，１１をそれぞれ作動させる構成、つまり、ボールねじ機構１１，１１のねじ軸１４，１４に付設された伝動タイミングプーリ１５，１５に、電動機８，８により駆動される伝動タイミングベルト１６，１６が巻き掛けられ、電動機８，８による回転運動をボールねじ機構１１，１１によって直線運動に変換する構成からそれぞれなっている。   Each drive mechanism 30, 30 is configured to operate the ball screw mechanism 11, 11 via the speed reduction transmission device 10, 10 by an electric motor 8, 8 such as a servo motor fixed to the rear plate 3, that is, a ball screw mechanism. The transmission timing belts 16 and 16 driven by the electric motors 8 and 8 are wound around the transmission timing pulleys 15 and 15 attached to the screw shafts 14 and 14 of the eleventh and elevenths 11 and 11, respectively, and the rotational motion by the electric motors 8 and 8 is ball screw. Each of the mechanisms 11 and 11 is configured to be converted into a linear motion.

ボールねじ機構１１は、フロントプレート２とリヤプレート３とに回転自在に両端を軸受けされたねじ軸１４と、プッシャプレート７に固定されてねじ軸１４に螺着されたボールナット１８とから構成されている。   The ball screw mechanism 11 includes a screw shaft 14 that is rotatably supported at both ends by the front plate 2 and the rear plate 3, and a ball nut 18 that is fixed to the pusher plate 7 and screwed to the screw shaft 14. ing.

減速伝動装置１０は、電動機８の出力軸８ａに付設された小径の伝動タイミングプーリ１３と、ボールねじ機構１１のねじ軸１４に付設された大径の伝動タイミングプーリ１５と、伝動タイミングプーリ１３及び伝動タイミングプーリ１５にそれぞれ巻き掛けられて双方のプーリ１３，１５の間に巻回された伝動タイミングベルト１６とから構成されている。   The reduction gear transmission 10 includes a small-diameter transmission timing pulley 13 attached to the output shaft 8a of the electric motor 8, a large-diameter transmission timing pulley 15 attached to the screw shaft 14 of the ball screw mechanism 11, a transmission timing pulley 13, and A transmission timing belt 16 is wound around the transmission timing pulley 15 and wound between the pulleys 13 and 15.

同期機構２２は、一対の駆動機構３０，３０にそれぞれ備えられた大径の伝動タイミングプーリ１５，１５間に、各ボールねじ機構１１のねじ軸１４の回転を同期させる同期タイミングベルト２１が巻回された構成からなっている。ねじ軸１４に付設された伝動タイミングプーリ１５は、少なくとも上記伝動タイミングベルト１６と同期機構２２に備えられた同期タイミングベルト２１とを並列に巻き掛けられる幅を有しており、各伝動タイミングプーリ１５，１５には、同期タイミングベルト２１が伝動タイミングベルト１６，１６の隣りにそれぞれ巻き掛けられている。
符号２４は、同期タイミングベルト２１の張力を調節するテンションプーリであり、調節部材２５で径方向に移動させられるようになっている。 In the synchronization mechanism 22, a synchronization timing belt 21 that synchronizes the rotation of the screw shaft 14 of each ball screw mechanism 11 is wound between large-diameter transmission timing pulleys 15 and 15 provided in the pair of drive mechanisms 30 and 30, respectively. It is composed of The transmission timing pulley 15 attached to the screw shaft 14 has a width that allows at least the transmission timing belt 16 and the synchronization timing belt 21 provided in the synchronization mechanism 22 to be wound in parallel. , 15, a synchronous timing belt 21 is wound around the transmission timing belts 16, 16, respectively.
Reference numeral 24 denotes a tension pulley that adjusts the tension of the synchronous timing belt 21 and is moved in the radial direction by the adjusting member 25.

次に、上記の構成とされた射出成形機の駆動装置Ａの作用を説明する。
各電動機８，８を作動させると、減速伝動装置１０，１０を介して各ボールねじ機構１１，１１にそれぞれ動力が伝達される。具体的には、電動機が作動すると、電動機８の出力軸８ａに付設された小径の伝動タイミングプーリ１３が回転し、伝動タイミングベルト１６が駆動し、大径の伝動タイミングプーリ１５が回転し、ボールねじ機構１１のねじ軸１４が軸回転する。一対のボールねじ機構１１，１１のねじ軸１４，１４がそれぞれ軸回転すると、各ボールナット１８，１８に付設されたプッシャプレート７は射出スクリュ６と一緒に電動機８，８の回転方向に従い、ガイドロッド４，４に沿って前又は後に移動する。このとき、同期機構２２は、両ボールねじ機構１１，１１のねじ軸１４，１４の回転を相互に同期させるため、両ボールねじ機構１１，１１のボールナット１８，１８は、互いに偏差なく正確に同期して動き、プッシャプレート７は円滑に移動する。また、射出スクリュ６及び射出スクリュ６の先端部にある図示せぬ樹脂材料を一定の圧力で押圧し続ける保圧工程を行うとき、電動機８，８を細かな正逆運転を繰り返させる。 Next, the operation of the driving device A of the injection molding machine having the above-described configuration will be described.
When the electric motors 8 and 8 are actuated, power is transmitted to the ball screw mechanisms 11 and 11 via the speed reduction transmissions 10 and 10, respectively. Specifically, when the electric motor is operated, the small-diameter transmission timing pulley 13 attached to the output shaft 8a of the electric motor 8 rotates, the transmission timing belt 16 is driven, the large-diameter transmission timing pulley 15 rotates, and the ball The screw shaft 14 of the screw mechanism 11 rotates. When the screw shafts 14, 14 of the pair of ball screw mechanisms 11, 11 rotate, the pusher plate 7 attached to each ball nut 18, 18 follows the rotation direction of the motors 8, 8 together with the injection screw 6, and guides It moves forward or backward along the rods 4 and 4. At this time, since the synchronization mechanism 22 synchronizes the rotation of the screw shafts 14 and 14 of the both ball screw mechanisms 11 and 11, the ball nuts 18 and 18 of the both ball screw mechanisms 11 and 11 can be accurately and without deviation from each other. The pusher plate 7 moves smoothly and moves smoothly. Moreover, when performing the pressure-holding process which continues pressing the injection screw 6 and the resin material (not shown) at the tip of the injection screw 6 with a constant pressure, the motors 8 and 8 are repeatedly operated in a fine forward / reverse direction.

上記した構成からなる射出成形機の駆動装置によれば、伝動タイミングプーリ１５は、伝動タイミングベルト１６を巻き掛けるプーリと同期タイミングベルト２１を巻き掛けるプーリとが一体になったものとなり、同期タイミングベルト２１を巻き掛けるプーリを別途設ける必要がないとともに、伝動タイミングベルト１６と同期タイミングベルト２１とが、同一ピッチ、同一径のプーリにそれぞれ巻き掛けられることになる。これによって、伝動タイミングベルト１６と同期タイミングベルト２１とを巻き掛けるプーリが１つとなるため、射出成形機の駆動装置の構成が単純化されて装置の組立を容易化することができるとともに、同心度が狂うことがなく安定した伝達を可能となり、さらにプーリを２段に形成する必要がなく伝動タイミングプーリ１５を容易に加工できコストダウンを図ることができる。   According to the drive apparatus for an injection molding machine having the above-described configuration, the transmission timing pulley 15 is a combination of a pulley around which the transmission timing belt 16 is wound and a pulley around which the synchronous timing belt 21 is wound. The transmission timing belt 16 and the synchronization timing belt 21 are respectively wound around pulleys having the same pitch and the same diameter. As a result, there is only one pulley around which the transmission timing belt 16 and the synchronous timing belt 21 are wound, so that the configuration of the drive device of the injection molding machine can be simplified and the assembly of the device can be facilitated. The transmission timing pulley 15 can be easily processed and the cost can be reduced without the necessity of forming pulleys in two stages.

また、伝動タイミングベルト１６と同期タイミングベルト２１のうち何れか一方のベルト側のバックラッシュが大きくなることがないため、保圧工程中にずれが生じず、正確な制御を行うことができる。
さらに、伝動タイミングベルト１６と同期タイミングベルト２１とを巻き掛けるプーリが同一径となるため、奥の方に巻き掛けられた伝動タイミングベルト１６の取付や交換も可能である。 In addition, since the backlash on either one of the transmission timing belt 16 and the synchronous timing belt 21 does not increase, there is no deviation during the pressure-holding process, and accurate control can be performed.
Furthermore, since the pulley around which the transmission timing belt 16 and the synchronous timing belt 21 are wound has the same diameter, the transmission timing belt 16 wound around the back can be attached or replaced.

以上、本発明に係る射出成形機の駆動装置の実施の形態について説明したが、本発明は上記した実施の形態に限定されるものではなく、その趣旨を逸脱しない範囲で適宜変更可能である。例えば、上記した実施の形態では、伝動タイミングベルト１６が、電動機８の出力軸８ａに付設された小径の伝動タイミングプーリ１３とボールねじ機構１１のねじ軸１４に付設された大径の伝動タイミングプーリ１５との間に巻回されている構成からなっているが、本発明は、伝動タイミングベルトが、電動機の出力軸以外に付設された伝動タイミングプーリとボールねじ機構のねじ軸に付設された伝動タイミングプーリとの間に巻回され、上記した電動機の出力軸以外に付設された伝動タイミングプーリが、他のベルトやプーリを介して電動機の出力軸に付設された伝動タイミングプーリと連動される構成であってもよい。   As mentioned above, although embodiment of the drive device of the injection molding machine concerning this invention was described, this invention is not limited to above-described embodiment, In the range which does not deviate from the meaning, it can change suitably. For example, in the above-described embodiment, the transmission timing belt 16 includes the small-diameter transmission timing pulley 13 attached to the output shaft 8 a of the electric motor 8 and the large-diameter transmission timing pulley attached to the screw shaft 14 of the ball screw mechanism 11. However, in the present invention, the transmission timing belt is provided on a transmission timing pulley provided in addition to the output shaft of the electric motor and on the screw shaft of the ball screw mechanism. A configuration in which a transmission timing pulley wound around a timing pulley and attached to other than the output shaft of the motor is linked to a transmission timing pulley attached to the output shaft of the motor via another belt or pulley. It may be.

また、上記した実施の形態では、駆動装置Ａの各ボールねじ機構１１は、いずれもねじ軸１４の回転でボールナット１８が移動するようになっているが、ボールナットの回転でボールねじ軸がプッシャプレート７と一緒に移動する構造とすることができる。また、上記した実施の形態においては、駆動装置のボールねじ機構１１，１１により、射出装置の射出スクリュ６を前後進させる可動部材としてのプッシャプレート７を駆動するように構成されているが、これに代え、上記ボールねじ機構１１，１１により型締装置の可動盤を（可動部材）を直接にまたはトグル機構を介して型締め駆動するものとして構成してもよく、また、エジェクター装置のエジェクタ板（可動部材）を直接または間接に駆動するものてして構成してもよい。この場合も、前記射出装置の駆動装置におけると同様に、各ボールねじ機構１１，１１の正確な同期回転により、各可動部材が円滑に移動し、装置の大型化（負荷の増大）に対応し得る。   In the above-described embodiment, each ball screw mechanism 11 of the driving device A is configured such that the ball nut 18 is moved by the rotation of the screw shaft 14, but the ball screw shaft is rotated by the rotation of the ball nut. The structure can move together with the pusher plate 7. In the above-described embodiment, the pusher plate 7 as a movable member for moving the injection screw 6 of the injection device back and forth is driven by the ball screw mechanisms 11 and 11 of the drive device. Instead, the movable plate of the mold clamping device may be configured to drive the mold clamping device (movable member) directly or via a toggle mechanism by the ball screw mechanisms 11 and 11, and the ejector plate of the ejector device. The (movable member) may be configured to be driven directly or indirectly. In this case as well, as in the driving device of the injection device, each of the movable members moves smoothly by the accurate synchronous rotation of the ball screw mechanisms 11 and 11 to cope with an increase in the size of the device (an increase in load). obtain.

本発明に係る射出成形機の駆動装置の実施の形態を示す正面図である。It is a front view which shows embodiment of the drive device of the injection molding machine which concerns on this invention. 図１に表す駆動装置の展開断面図である。FIG. 2 is a developed cross-sectional view of the drive device illustrated in FIG. 1.

符号の説明Explanation of symbols

７ プッシャプレート（可動部材）
８ 電動機
１１ ボールねじ機構
１４ ねじ軸
１５ 伝動タイミングプーリ
１６ 伝動タイミングベルト
２１ 同期タイミングベルト
３０ 駆動機構
Ａ 射出成形機の駆動装置 7 Pusher plate (movable member)
8 Electric motor 11 Ball screw mechanism 14 Screw shaft 15 Transmission timing pulley 16 Transmission timing belt 21 Synchronous timing belt 30 Drive mechanism A Drive unit for injection molding machine

Claims (1)

ボールねじ機構のねじ軸に付設された伝動タイミングプーリに、電動機により駆動される伝動タイミングベルトが巻き掛けられ、前記電動機による回転運動を前記ボールねじ機構によって直線運動に変換する構成からなる駆動機構が複数備えられているとともに、
該複数の駆動機構にそれぞれ備えられた各ボールねじ機構のねじ軸の回転を同期させる同期タイミングベルトが備えられ、
前記複数の駆動機構にそれぞれ備えられた各ボールねじ機構によって可動部材を直線的に駆動させる射出成形機の駆動装置において、
前記複数の駆動機構にそれぞれ備えられた各伝動タイミングプーリは同一ピッチ、同一外径で一体形成された二つのプーリを備えており、該二つのプーリに前記電動タイミングベルトと前記同期タイミングベルトがそれぞれ巻き掛けられ、前記同期タイミングベルトは、電動機に接続されておらず、前記各伝動タイミングプーリの間に巻回されていることを特徴とする射出成形機の駆動装置。 A drive mechanism having a configuration in which a transmission timing belt driven by an electric motor is wound around a transmission timing pulley attached to a screw shaft of the ball screw mechanism, and a rotational motion by the electric motor is converted into a linear motion by the ball screw mechanism. There are several, and
A synchronous timing belt for synchronizing the rotation of the screw shaft of each ball screw mechanism provided in each of the plurality of drive mechanisms;
In the drive device of the injection molding machine that linearly drives the movable member by each ball screw mechanism provided in each of the plurality of drive mechanisms,
Each transmission timing pulley provided in each of the plurality of drive mechanisms includes two pulleys integrally formed with the same pitch and the same outer diameter, and the electric timing belt and the synchronous timing belt are respectively connected to the two pulleys. The drive device for an injection molding machine, wherein the synchronous timing belt is wound and is not connected to an electric motor but is wound between the transmission timing pulleys.
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CN102642283A (en) * 2011-12-12 2012-08-22 宁波长飞亚塑料机械制造有限公司 Double-leading-screw synchronous driving device of injecting device for injection molding machine
CN102642271B (en) * 2011-12-13 2017-01-25 宁波长飞亚塑料机械制造有限公司 Double screw diagonally symmetric guide nozzle contact device of injection molding machine
TW201446466A (en) * 2013-06-06 2014-12-16 Foxnum Technology Co Ltd Injection machine
JP3191413U (en) * 2014-04-10 2014-06-19 ファナック株式会社 Injection molding machine
JP2016002745A (en) * 2014-06-19 2016-01-12 東洋機械金属株式会社 Injection molding machine
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