JPH0439018A - Mold clamping device of injection molding machine - Google Patents

Mold clamping device of injection molding machine

Info

Publication number
JPH0439018A
JPH0439018A JP14586890A JP14586890A JPH0439018A JP H0439018 A JPH0439018 A JP H0439018A JP 14586890 A JP14586890 A JP 14586890A JP 14586890 A JP14586890 A JP 14586890A JP H0439018 A JPH0439018 A JP H0439018A
Authority
JP
Japan
Prior art keywords
motor
mold clamping
input shaft
support
reduction gear
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP14586890A
Other languages
Japanese (ja)
Other versions
JP2664525B2 (en
Inventor
Koichi Kamata
浩一 鎌田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sumitomo Heavy Industries Ltd
Original Assignee
Sumitomo Heavy Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sumitomo Heavy Industries Ltd filed Critical Sumitomo Heavy Industries Ltd
Priority to JP14586890A priority Critical patent/JP2664525B2/en
Publication of JPH0439018A publication Critical patent/JPH0439018A/en
Application granted granted Critical
Publication of JP2664525B2 publication Critical patent/JP2664525B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17Component parts, details or accessories; Auxiliary operations
    • B29C45/64Mould opening, closing or clamping devices
    • B29C45/66Mould opening, closing or clamping devices mechanical

Landscapes

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

Abstract

PURPOSE:To secure durability and maintain highly accuracy of each mechanism part at the first stage extending for a long period, by a method wherein a driving device is arranged so that the same is capable of making longitudinal movement and incapable of making turning relatively to a toggle support. CONSTITUTION:At the time of generation of mold clamping force, though its reaction force is applied to an input shaft 22 in a bending direction (direction of arrow A), since the input shaft 22, a motor 20 with a reduction gear and a motor support 21 are in a body and, moreover, longitudinal movement (movement of direction of arrow A) can be performed freely independent of a toggle support 14 along tie bars 17a, 17b. Therefore, this reaction force is concentrated to only the toggle support 14 and it is eliminated that parts each of the motor 20 with the reduction gear including the input shaft 22 are deformed or injured. In addition, in a generation process of the mold clamping force, the reaction force of turning torque of the motor 20 with the reduction gear is received by the tie bars 17a, 17b, which are fitted in the motor 20 with the reduction gear, through the motor support 21 and the motor support 21 itself is prevented from turning by the reaction force.

Description

【発明の詳細な説明】[Detailed description of the invention]

【産業上の利用分野1 本発明は、射出成形機の型締装置に係り、特に、型締力
発生時に駆動装置の軸部に加わる曲げ荷重を逃し、該駆
動装置の軸部が変形したり破損したりしないように考慮
した射出成形機の型締装置に間する。 【従来の技術】 従来、トグルサポート(リアプラテンと呼ばれることも
ある)と可動プラテンとの間にクランク機構を備え、電
動式の駆動装置を用いて前記クランク機構を駆動するこ
とにより可動プラテンをトグルサポートに対して前後動
させ、該可動プラテンと固定プラテンとの間で型開閉又
は型締動作を行うようにした射出成形機が広く使用され
ている。 電動式の駆動装置を用いてクランク11構を駆動する構
成としては、例えば実開平1−148321に示される
ように、サーボモータ(電動機)で発生された動力を、
プーリ及びベルトを介して該サーボモータの軸とは非同
軸に配置されたクランク機構の入力軸に伝達する構成、
あるいはサーボモータで発生された動力を、減速機等を
介して該サーボモータの軸と同軸に配置されたクランク
機構の入力軸に伝達する構成が知られている。
[Industrial Application Field 1] The present invention relates to a mold clamping device for an injection molding machine, and in particular, relieves the bending load applied to the shaft portion of the drive device when mold clamping force is generated, thereby preventing the shaft portion of the drive device from being deformed. The mold clamping device of the injection molding machine should be designed to prevent damage. [Prior Art] Conventionally, a crank mechanism is provided between a toggle support (sometimes called a rear platen) and a movable platen, and the movable platen is toggled supported by driving the crank mechanism using an electric drive device. Injection molding machines are widely used in which mold opening/closing or mold clamping operations are performed between the movable platen and the fixed platen by moving the mold back and forth against the movable platen. As a configuration for driving the crank 11 structure using an electric drive device, for example, as shown in Utility Model Application Publication No. 1-148321, power generated by a servo motor (electric motor) is used to drive the crank 11 structure.
A configuration in which transmission is transmitted via a pulley and a belt to an input shaft of a crank mechanism disposed non-coaxially with the shaft of the servo motor;
Alternatively, a configuration is known in which power generated by a servo motor is transmitted via a speed reducer or the like to an input shaft of a crank mechanism disposed coaxially with the shaft of the servo motor.

【発明が解決しようとする課題】[Problem to be solved by the invention]

一般に、プーリ及びベルトを使用する2軸梢成のものは
、比較的大きな動力を無理なく伝達することができると
いう利点はあるが、所定の速度比を得るためにプーリが
巨大化し、装置全体が大型化すると共にコストが上昇し
易いという欠点がある。 一方、クランク機構の入力軸がサーボモータの軸と同軸
とされた構成のものは、コスト、取付はスペースの観点
では問題はないものの、型締力を発生する際にクランク
機構の入力軸、即ち駆動装置の軸を支持する部分に直接
的に大きな曲げ荷重がかかり、駆動装2<減速機を含む
)の各部品等が変形したり破損したりし易いという欠点
がある。 本発明は、特にクランク機構の入力軸をサーボモータの
軸と同軸に配置する構成に係る射出成形機の型締装置に
おいて、コスト低減、取付はスペースの縮小化の利点を
そのまま生かしながら、型締力を発生する際に駆動装置
の軸、あるいは、これを支持する部分等に過度の荷重が
かかるのを防止し、以てこれらの耐久性をN保すると共
に初期の各機構部の精度を長期に亘って高く維持してお
くことのできる射出成形機の型締装置を提供することを
目的とする。
In general, two-axis systems that use pulleys and belts have the advantage of being able to transmit relatively large amounts of power without difficulty, but in order to obtain a predetermined speed ratio, the pulleys become huge and the entire device becomes bulky. The disadvantage is that the cost tends to increase as the size increases. On the other hand, a configuration in which the input shaft of the crank mechanism is coaxial with the axis of the servo motor poses no problem in terms of cost and installation space, but when generating mold clamping force, the input shaft of the crank mechanism There is a disadvantage that a large bending load is directly applied to the portion that supports the shaft of the drive device, and each component of the drive device 2 (including the reducer) is easily deformed or damaged. The present invention is particularly applicable to a mold clamping device for an injection molding machine in which the input shaft of a crank mechanism is arranged coaxially with the axis of a servo motor, while still taking advantage of cost reduction and reduced installation space. This prevents excessive load from being applied to the shaft of the drive device or the parts that support it when generating force, thereby preserving their durability and maintaining the accuracy of each mechanical part in the initial stage over a long period of time. An object of the present invention is to provide a mold clamping device for an injection molding machine that can maintain a high temperature over a period of time.

【課題を解決するための手P11】 本発明は、トグルサポートと可動プラテンとの間にクラ
ンク機構を備え、電動式の駆動装置を用いて前記クラン
ク機構を駆動することにより可動プラテンをトグルサポ
ートに対して前後動させ、該可動プラテンと固定プラテ
ンとの間で型開閉又は型締動作を行う射出成形機の型締
装置において、前記駆動装置を、前記トグルサポートに
対して相対的に前後動可能且つ回転動不能に配置したこ
とにより、上記目的を達成したものである。
[Means for Solving the Problem P11] The present invention provides a crank mechanism between a toggle support and a movable platen, and drives the crank mechanism using an electric drive device to connect the movable platen to the toggle support. In a mold clamping device for an injection molding machine that performs mold opening/closing or mold clamping operations between the movable platen and the fixed platen by moving the drive device back and forth relative to the toggle support, the drive device is movable back and forth relative to the toggle support. Moreover, by arranging it so that it cannot rotate, the above object is achieved.

【作用】[Effect]

第4図に示されるように、駆動装置(減速機を含む)1
により同軸に配置されたクランク機構2の入力軸2aを
駆動して型締を行う場合、その型締の際に矢視A方向の
反作用が該入力軸2aに加わる。この場合、該入力軸2
aには曲げ荷重が働き、該入力軸2aは第4図破線で示
されるように軸線と垂直な方向に曲げられることになる
。駆動装置工の軸は、クランク6!梢を駆動して型開閉
や型締を行う方向、即ち回転する方向に対しては強い強
度を持っているが、軸に垂直な方向の力に対しては比較
的弱く、破損や変形という不具合を生じ易い。 本発明では、このようにクランク機構の入力軸が型締の
際に矢視A方向の力を受けた場合に、この力によって駆
動装置自体がトグルサポート4から独立してA1方向に
前後動し、上記曲げ荷重を逃すようになっている。この
結果、クランク機構の矢印A方向の反力はブラケット3
を介してトグルサポート4のみで受は止めるようになる
ため、駆動装置lの軸にはほとんど曲げ荷重がかからな
くなり、破損や変形が発生せず当初の性能を長期に亘っ
て維持することができるようになる。 なお、駆動装置1はトグルサポート4に対して前後動は
できるが回転動はできないように配!されているため、
該駆動装置1の動力は従来通り支障なくクランク機構2
の入力軸2aに伝達される。
As shown in FIG. 4, the drive device (including the reducer) 1
When clamping the mold by driving the input shaft 2a of the crank mechanism 2 arranged coaxially with the mold, a reaction in the direction of arrow A is applied to the input shaft 2a during mold clamping. In this case, the input shaft 2
A bending load acts on the input shaft 2a, and the input shaft 2a is bent in a direction perpendicular to the axis as shown by the broken line in FIG. The axis of drive equipment engineering is crank 6! Although it has strong strength in the direction of driving the treetop to open, close, and clamp the mold, that is, in the direction of rotation, it is relatively weak against forces perpendicular to the axis, resulting in problems such as breakage and deformation. tends to occur. In the present invention, when the input shaft of the crank mechanism receives a force in the direction of the arrow A during mold clamping, the drive device itself moves back and forth in the A1 direction independently of the toggle support 4 due to this force. , which is designed to relieve the bending load mentioned above. As a result, the reaction force of the crank mechanism in the direction of arrow A is
Since the support is stopped only by the toggle support 4 via the toggle support 4, almost no bending load is applied to the shaft of the drive device l, and the original performance can be maintained over a long period of time without damage or deformation. become able to. The drive device 1 is arranged so that it can move back and forth with respect to the toggle support 4, but cannot rotate. Because it has been
The power of the drive device 1 is transferred to the crank mechanism 2 without any problem as before.
is transmitted to the input shaft 2a.

【実施例】【Example】

以下図面に基づいて、本発明の実施例を詳細に説明する
。 第1図(A)、(B)は共に本発明が適用された減速機
付電動機を用いたクランク式型締装置であり、第1図(
A)は型開の状態、(B)は型全閉の状態を表わしてい
る。又、第2図は上記装置の要部を可動プラテン側から
見た斜視図、第3図は第1図(A)の矢視nr−m線に
沿う断面図である。 各図において、符号11は固定プラテン、12は可動プ
ラテンで、それぞれに金型13aと13わが取付けられ
ている。符号14は架台15上を移動可能なトグルサポ
ート、16は後に詳述するクランク6!梢である。トグ
ルサポート14を架台15上で固定し、このクランク6
!梢16によって可動プラテン12を固定プラテン11
1)Ifに移動させ、型締を行う。 トグルサポート14と固定プラテン11との間には4本
のタイバー17a〜17dが取付けられており、これら
のタイバー17a〜17dは可動プラテン12に設けら
れな孔18a〜18dを貫通している。従って、可動プ
ラテン12はこのタイバー17a〜17dに沿って移動
させられることになる。 なお、トグルサポート14はタイバ−17a〜17d端
部に切られたねじ部及びトグルサポート14に回転可能
に支持されたナツトとの組合せく図示は省略)により、
架台15上を移動及び固定できるようになっている。 前記クランク機構16は減速機付モータ20によって駆
動される。この減速機付モータ20は、モータサポート
21に組込まれ、このモータサポート21がタイバー1
78.17bに貫通孔21a、21bを介して摺動可能
(且つ回転動不能)に組込まれている。 減速機付モータ2oの出力軸は、そのままクランク機構
16の入力軸22となっている。この入力軸22は、ト
グルサポート14から突出形成されたブラケット23に
取付けられたブシュ24に回転可能に嵌合し、且つクラ
ンク機構16の第1リンク25を貫通している。又該入
力軸22と第1リンク25は回転不可となるように廻り
止め26にて固定されている。第1リンク25には第2
リンク27が枢着され、この第2リンク27が可動プラ
テン12側に固着されたブラケット28に枢着されてい
る。 次に、この実施例の作用を説明する。 第1図(A)は型開の状態であり、この状態から減速機
付モータ20によりクランク機構16の入力軸22を矢
印B方向に回転させてやると入力軸22に連結された第
1リンク25も廻り止め26の機能によりB方向に一体
的に回転する。 第1リンク25と第2リンク27とがほぼ一直線となり
、型締状態(第1図(B))となると、リンクの拡大力
を利用した周知の方法、あるいはその他の方法(例えば
特願平1−174091に呈示されているような液圧シ
リンダによる方法)によりタイバー17a〜17dが引
張られ、型締力が発生する。 この過程において、減速機付モータ20の回転トルクの
反力は、モータサポート21を介してこれに嵌合するタ
イバー178.17bで受け、該反力によってモータサ
ポート21自体が回転するのが防止されている。 又、型締力が発生するとき、その反力は入力軸22を曲
げる方向(矢印A方向)に加わるが、該入力軸22、減
速機付モータ20及びモータサポート21は一体とされ
ており、しかもトグルサポート14と独立してタイバー
178.17bに沿って自由に前後動(矢印A方向の移
動)し得るため、この反力はブラケット23を介してト
グルサポート14のみに集中し、該反力によって入力軸
22を初めとする減速機付モータ20の各部分が変形や
損傷を受けたりすることはなくなる。 このため、型締力発生時に加わる大きな荷重による駆動
装置の各機構部分に対する負担を外径の寸法増大等によ
って対処する必要がなくなるなめ、−層の小型化、軽量
化、コスト低減化が可能となる。 【発明の効果1 以上説明した通り、本発明によれば、゛型締力が発生す
るときに駆動装置の出力軸(クランク機構の入力軸)が
受ける曲げ荷重を良好に吸収することができるようにな
り、該駆動装置の各部分が変形しなり損傷したりするこ
とがなくなるため、装置自体を一層小型化、軽量化する
ことができ、コスト低減を図ることができるようになる
と共に、耐久性をそれだけ向上させることができるよう
になる。
Embodiments of the present invention will be described in detail below based on the drawings. 1(A) and 1(B) both show a crank-type mold clamping device using an electric motor with a reduction gear to which the present invention is applied;
A) shows the mold open state, and (B) shows the mold fully closed state. Further, FIG. 2 is a perspective view of the main parts of the apparatus as viewed from the movable platen side, and FIG. 3 is a sectional view taken along the arrow line nr-m in FIG. 1(A). In each figure, numeral 11 is a fixed platen, 12 is a movable platen, and molds 13a and 13 are attached to each of them. Reference numeral 14 is a toggle support movable on the frame 15, and 16 is a crank 6, which will be described in detail later. It's the treetops. The toggle support 14 is fixed on the frame 15, and the crank 6
! The movable platen 12 is fixed to the platen 11 by the treetop 16.
1) Move to If and perform mold clamping. Four tie bars 17a to 17d are attached between the toggle support 14 and the fixed platen 11, and these tie bars 17a to 17d pass through holes 18a to 18d provided in the movable platen 12. Therefore, the movable platen 12 is moved along the tie bars 17a to 17d. In addition, the toggle support 14 is formed by a combination of threaded portions cut at the ends of the tie bars 17a to 17d and a nut rotatably supported by the toggle support 14 (not shown).
It can be moved and fixed on the pedestal 15. The crank mechanism 16 is driven by a motor 20 with a reduction gear. This motor 20 with a reduction gear is incorporated in a motor support 21, and this motor support 21 is connected to a tie bar 1.
78.17b through through holes 21a and 21b so as to be slidable (and not rotatable). The output shaft of the motor 2o with a reduction gear directly serves as the input shaft 22 of the crank mechanism 16. The input shaft 22 is rotatably fitted into a bush 24 attached to a bracket 23 projecting from the toggle support 14 and passes through a first link 25 of the crank mechanism 16 . Further, the input shaft 22 and the first link 25 are fixed with a rotation stopper 26 so that they cannot rotate. The first link 25 has a second
A link 27 is pivotally attached, and this second link 27 is pivotally attached to a bracket 28 fixed to the movable platen 12 side. Next, the operation of this embodiment will be explained. FIG. 1(A) shows a state in which the mold is opened. From this state, when the input shaft 22 of the crank mechanism 16 is rotated in the direction of arrow B by the motor 20 with a reduction gear, the first link connected to the input shaft 22 is opened. 25 also rotates integrally in the direction B due to the function of the rotation stopper 26. When the first link 25 and the second link 27 become almost in a straight line and the mold is in a clamped state (FIG. 1 (B)), a well-known method using the expanding force of the links or another method (for example, Japanese Patent Application No. 174091), the tie bars 17a to 17d are pulled and a mold clamping force is generated. In this process, the reaction force of the rotational torque of the motor 20 with a reduction gear is received by the tie bar 178.17b fitted to the motor support 21, and the motor support 21 itself is prevented from rotating due to the reaction force. ing. Furthermore, when mold clamping force is generated, the reaction force is applied in the direction of bending the input shaft 22 (in the direction of arrow A), but the input shaft 22, the motor 20 with a speed reducer, and the motor support 21 are integrated. Moreover, since it can freely move back and forth (movement in the direction of arrow A) along the tie bar 178.17b independently of the toggle support 14, this reaction force is concentrated only on the toggle support 14 via the bracket 23, and the reaction force Therefore, each part of the motor 20 with a reduction gear, including the input shaft 22, will not be deformed or damaged. Therefore, there is no need to deal with the burden on each mechanical part of the drive device due to the large load that is applied when mold clamping force is generated, by increasing the outer diameter, etc., making it possible to make the layer smaller, lighter, and lower in cost. Become. Effects of the Invention 1 As explained above, according to the present invention, the bending load that is applied to the output shaft of the drive device (input shaft of the crank mechanism) when mold clamping force is generated can be well absorbed. Since each part of the drive device will not be deformed or damaged, the device itself can be made smaller and lighter, reducing costs and improving durability. will be able to improve that much.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図(A)、(B)はそれぞれ本発明の実施例が適用
された射出成形機の型締装置を示す一部破断の正面図、 第2図はクランクamの駆動装置の付近を示す斜視図、 第3図は第1図(A)の矢視l−11I線に沿う断面図
、 第4図は本発明の詳細な説明するための駆動装置付近の
断面図である。 11・・・固定プラテン、 12・・・可動プラテン、 14・・・トグルサポート、 16・・・クランク機構、 17a〜17b・・・タイバー 20・・・減速機付モータ、 21・・・モータサポート、 22・・・駆動装置の出力軸(クランク機構の入力軸)
、23.28・・・ブラケット、 25・・・第1リンク、 27・・・第2リンク。 復代理人 牧野剛博 松山圭佑 高矢 諭 22(人7J*白ン
Figures 1 (A) and (B) are partially cutaway front views showing the mold clamping device of an injection molding machine to which an embodiment of the present invention is applied, respectively, and Figure 2 shows the vicinity of the drive device of the crank AM. 3 is a sectional view taken along the line 1-11I of FIG. 1(A); FIG. 4 is a sectional view of the vicinity of the drive device for explaining the present invention in detail. DESCRIPTION OF SYMBOLS 11... Fixed platen, 12... Movable platen, 14... Toggle support, 16... Crank mechanism, 17a-17b... Tie bar 20... Motor with reducer, 21... Motor support , 22...Output shaft of the drive device (input shaft of the crank mechanism)
, 23.28...bracket, 25...first link, 27...second link. Sub-agent Takehiro Makino Keisuke Matsuyama Satoshi Takaya 22 (7J*white)

Claims (1)

【特許請求の範囲】[Claims] (1)トグルサポートと可動プラテンとの間にクランク
機構を備え、電動式の駆動装置を用いて前記クランク機
構を駆動することにより可動プラテンをトグルサポート
に対して前後動させ、該可動プラテンと固定プラテンと
の間で型開閉又は型締動作を行う射出成形機の型締装置
において、前記駆動装置を、前記トグルサポートに対し
て相対的に前後動可能且つ回転動不能に配置したことを
特徴とする射出成形機の型締装置。
(1) A crank mechanism is provided between the toggle support and the movable platen, and by driving the crank mechanism using an electric drive device, the movable platen is moved back and forth with respect to the toggle support, and fixed to the movable platen. In a mold clamping device for an injection molding machine that performs mold opening/closing or mold clamping operations between a platen and a platen, the driving device is arranged so as to be movable back and forth relative to the toggle support but not rotationally movable. mold clamping device for injection molding machines.
JP14586890A 1990-06-04 1990-06-04 Mold clamping device of injection molding machine Expired - Lifetime JP2664525B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14586890A JP2664525B2 (en) 1990-06-04 1990-06-04 Mold clamping device of injection molding machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14586890A JP2664525B2 (en) 1990-06-04 1990-06-04 Mold clamping device of injection molding machine

Publications (2)

Publication Number Publication Date
JPH0439018A true JPH0439018A (en) 1992-02-10
JP2664525B2 JP2664525B2 (en) 1997-10-15

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Family Applications (1)

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JP14586890A Expired - Lifetime JP2664525B2 (en) 1990-06-04 1990-06-04 Mold clamping device of injection molding machine

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998038025A1 (en) * 1995-11-08 1998-09-03 Kao Corporation Clamping device for blow molding machines
CN1065176C (en) * 1997-02-25 2001-05-02 花王株式会社 Clamping device for blow molding machines
JP2002225100A (en) * 2001-01-29 2002-08-14 Mitsubishi Heavy Ind Ltd Electromotive toggle mold clamping device and electromotive half nut on-off device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998038025A1 (en) * 1995-11-08 1998-09-03 Kao Corporation Clamping device for blow molding machines
US6102685A (en) * 1997-02-25 2000-08-15 Kao Corporation Mold-clamping device of blow molding machine
CN1065176C (en) * 1997-02-25 2001-05-02 花王株式会社 Clamping device for blow molding machines
JP2002225100A (en) * 2001-01-29 2002-08-14 Mitsubishi Heavy Ind Ltd Electromotive toggle mold clamping device and electromotive half nut on-off device

Also Published As

Publication number Publication date
JP2664525B2 (en) 1997-10-15

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