JPH02121807A - Clamping device - Google Patents

Clamping device

Info

Publication number
JPH02121807A
JPH02121807A JP27544788A JP27544788A JPH02121807A JP H02121807 A JPH02121807 A JP H02121807A JP 27544788 A JP27544788 A JP 27544788A JP 27544788 A JP27544788 A JP 27544788A JP H02121807 A JPH02121807 A JP H02121807A
Authority
JP
Japan
Prior art keywords
mold clamping
mold
pressure oil
clamping ram
ball
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
JP27544788A
Other languages
Japanese (ja)
Other versions
JP2525880B2 (en
Inventor
Hajime Hamada
源 浜田
Kazuhisa Ozeki
大関 和久
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.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi 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 Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Priority to JP63275447A priority Critical patent/JP2525880B2/en
Publication of JPH02121807A publication Critical patent/JPH02121807A/en
Application granted granted Critical
Publication of JP2525880B2 publication Critical patent/JP2525880B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • B29C45/68Mould opening, closing or clamping devices hydro-mechanical

Abstract

PURPOSE:To make a device small in size and to reduce the cost thereof by constructing the device of a hydraulic clamping ram, a friction clutch element and a spring member actuating the clamping ram in the release direction constantly. CONSTITUTION:A pressure oil chamber A is formed between an end plate 103 and a cover 133 fixed to the end plate 103, while a pressure oil chamber B is formed between a clamping ram 121 and the end plate 103. When pressure oil in the pressure oil chamber A is released while it is supplied into the pressure oil chamber B, the clamping ram 121 advances while compressing a spring 138 and a friction clutch element 135 comes into contact with a lower bearing retainer 132. Therefore the retainer 132 stops the rotation of a nut 112 and makes the whole of the ball nut 112 and a ball screw 111 advance. Consequently, they are pressed onto the mold-closing side by a strong force of oil pressure and thus a clamping force is obtained. According to this constitution, the device is made small in size, the cost thereof is reduced and the execution of an accurate pressure control is enabled.

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は射出成形機に利用できる型締装置に関する。[Detailed description of the invention] (Industrial application field) The present invention relates to a mold clamping device that can be used in an injection molding machine.

(従来の技術) 従来、電動機を用いて型開閉動作を行う場合には、例え
ば、トグル機構の如くメカニカルな倍力機構を用いるが
、型開閉と型締に各々専用の電動機を用いていた。これ
を直圧式と称す。
(Prior Art) Conventionally, when opening and closing a mold using an electric motor, a mechanical booster mechanism such as a toggle mechanism is used, but dedicated electric motors are used for opening and closing the mold and for clamping the mold. This is called a direct pressure type.

第3図に従来の直圧式型締装置を示す。Figure 3 shows a conventional direct pressure mold clamping device.

また、射出成形機の型開閉動作中の負荷及び速度を第1
表に示す。
In addition, the load and speed during mold opening and closing operations of the injection molding machine are
Shown in the table.

第1表 射出成形機の型開閉動作 さて、第3図において負荷の小さい、型開における高速
、低速、型開における離型、高速、低速は型開閉用電動
機15を駆動し、タイミングベルト17を介してボール
スクリュ11を回転させる。この回転が、可動盤2に固
定されたナツト12によって直線運動に変換され、型開
閉動作を行う。また、強大な力のみを必要とする型締昇
圧、保持動作は、型締用電動機16を駆動し、タイミン
グベルト18を介してボールスクリュ11、ナツト12
により型締力が与えられる。
Mold opening/closing operations of the first injection molding machine Now, in FIG. 3, the mold opening and closing speeds, which have small loads, high speed and low speed, and mold opening, high speed and low speed, drive the mold opening and closing electric motor 15 and the timing belt 17. The ball screw 11 is rotated through the ball screw 11. This rotation is converted into linear motion by a nut 12 fixed to the movable platen 2, thereby performing mold opening/closing operations. In addition, for mold clamping pressurization and holding operations that require only a strong force, the mold clamping electric motor 16 is driven, and the ball screw 11 and the nut 12 are connected via the timing belt 18.
gives mold clamping force.

なお、型締用電動機工6は、減速機を設けて強大なトル
クを発生させる。更に、停止状態でトルクを発生し続け
ることによる過熱防止のために、電磁クラッチを設けて
所望の型締力を得た後、メカニカルにロックして電動機
16の駆動を停止する処置をとる場合がある。
Note that the mold clamping electric motor 6 is provided with a speed reducer to generate a powerful torque. Furthermore, in order to prevent overheating due to continued generation of torque in a stopped state, an electromagnetic clutch may be provided to obtain the desired mold clamping force and then mechanically lock the motor 16 to stop driving. be.

(発明が解決しようとする課題) しかしながら、従来のこうした型締機構では、(11高
速低負荷、強大な圧締め等を行うため、駆動用電動機を
各々専用に設ける必要があり、更に型締用電動機16に
は、高価な減速機、クラッチを設ける必要がある。
(Problem to be Solved by the Invention) However, in such a conventional mold clamping mechanism, (11) it is necessary to provide a dedicated drive motor for each to perform high speed, low load, powerful clamping, etc. The electric motor 16 needs to be equipped with an expensive speed reducer and clutch.

(2)  ボールスクリュ11を回転させながら強大な
型締力を得るため、ボールネジ、ナツトの寿命が短くな
る。
(2) Since a strong mold clamping force is obtained while rotating the ball screw 11, the life of the ball screw and nut is shortened.

(3)強大な型締力を支えるため、大容量のタイミング
ベルト、スラストベアリングが必要となり、スペース的
にも不利で、高価となる。
(3) In order to support the strong mold clamping force, a large-capacity timing belt and thrust bearing are required, which is disadvantageous in terms of space and expensive.

等の問題があった。There were other problems.

本発明はこうした課題を解決すべく開発されたものであ
る。
The present invention was developed to solve these problems.

(課題を解決するための手段) このため、本発明は型開閉用の駆動力を互いに螺合され
るボールスクリュ又はボールナツトを介して可動盤に伝
達する型開閉用電動機と、前記ボールスクリュ又はボー
ルナットに固設されたベアリングリテイナと、型締時の
型締力を油圧により発生させる型締ラムと、型締時前記
ベアリングリテイナに接触する同型締ラムの当接部に形
成される摩擦クラッチ部と、前記型締ラムを常時離型方
向に付勢するスプリング部材とからなることを特徴とす
る型締装置を構成とし、これを上記課題の解決手段とす
るものである。
(Means for Solving the Problems) Therefore, the present invention provides a mold opening/closing electric motor that transmits a driving force for mold opening/closing to a movable platen through a ball screw or a ball nut screwed together, and A bearing retainer fixed to the nut, a mold clamping ram that hydraulically generates mold clamping force during mold clamping, and a friction clutch formed at the abutting part of the mold clamping ram that contacts the bearing retainer during mold clamping. and a spring member that always biases the mold clamping ram in the mold release direction, and this is a means for solving the above problem.

(作用) 例えば、ボールナットにベアリングリテイナを固設した
場合には、型開閉用電動機の駆動は適当な伝動部材を介
してボールナットを回転させ、これに螺合するボールス
クリュに直線運動を与え、可動盤を前進又は後退させて
、型開閉動作を行う。
(Function) For example, when a bearing retainer is fixed to a ball nut, the drive of the motor for opening and closing the mold rotates the ball nut via an appropriate transmission member, giving linear motion to the ball screw that is screwed into the ball nut. , move the movable plate forward or backward to perform mold opening/closing operations.

型締時は、型締ラムに圧油を供給し、型締ラムの端面を
前記ベアリングリテイナに圧接させ、ボールナット、ボ
ールスクリュを介して可動盤に型締力を発生させる。こ
のとき、型締ラムの前記端面ば摩擦クラッチ部とされて
おり、かつ案内部材により型締ラムの回転が阻止されて
いるため、ボールナットの回転も阻止される。
During mold clamping, pressure oil is supplied to the mold clamping ram, the end face of the mold clamping ram is brought into pressure contact with the bearing retainer, and mold clamping force is generated in the movable platen via the ball nut and ball screw. At this time, since the end surface of the mold clamping ram is used as a friction clutch portion and rotation of the mold clamping ram is prevented by the guide member, rotation of the ball nut is also prevented.

型開時は、型締ラムの前記圧油を抜いてやると、型締ラ
ムを離型方向に付勢するスプリング力により自動的に型
締ラムの摩擦クラッチ部が前記ベアリングリテイナから
離れ、型開閉用電動機の駆動で可動盤を後進させる。
When opening the mold, when the pressure oil in the mold clamping ram is removed, the friction clutch portion of the mold clamping ram is automatically separated from the bearing retainer by the spring force that urges the mold clamping ram in the mold release direction, and the mold is released. The movable platen is moved backward by the opening/closing electric motor.

(実施例) 以下、本発明の実施例を図面に基づいて説明する。(Example) Embodiments of the present invention will be described below based on the drawings.

第1図は本発明の代表的な実施例を示し、第2図は第1
図におけるA部の詳細図である。なお、図中、第3図と
同一部分には同一符号が付してあり、1は固定盤、2は
可動盤、4はタイバーである。
FIG. 1 shows a typical embodiment of the invention, and FIG.
It is a detailed view of part A in the figure. In the figure, the same parts as in FIG. 3 are given the same reference numerals; 1 is a fixed plate, 2 is a movable plate, and 4 is a tie bar.

さて、低負荷の型開における高速、低速並びに型開にお
ける離型、高速、低速はサーボモータ等の型開閉用電動
機115(エンドプレー目o3に固定されている。)を
駆動し、タイミングベルト117を介してプーリ113
(連結部材116を介しボールナンド112に固定され
ている。)、ボールナット112(ボールスクリュ11
1に螺合すると共にベアリングリティナ132に固定さ
れている。)を回転させ、ボールスクリュillを直線
運動させることにより、同ボールスクリュ111に接続
された可動盤2を動作させる。
Now, for low-load mold opening at high and low speeds, and for mold opening at high and low speeds, a mold opening/closing electric motor 115 such as a servo motor (fixed to end play eye o3) is driven, and a timing belt 117 is driven. Pulley 113 through
(Fixed to the ball nut 112 via the connecting member 116.), the ball nut 112 (the ball screw 11
1 and is fixed to the bearing retainer 132. ) is rotated to linearly move the ball screw 111, thereby operating the movable platen 2 connected to the ball screw 111.

この時、圧油室A(外部ベアリングリティナ131はエ
ンドプレート103と、同プレート103に固定された
カバー133との間に圧油室Aを形成する。)・には高
圧油が供給されており、ベアリングリテイナ131,1
32 、ベアリング14、ボールナツト112、プーリ
113は後退限にあり、外部ベアリングリテイナ131
は、エンドプレート103に当接した状態となっている
。また、圧油室B(型締ラム121とエンドプレート1
03との間に圧油室Bを形成する。)の作動油は、図示
しない油圧回路によりタンクへ解放され、型締ラム12
1は、同型締ラム121に固定されたガイド板137と
エンドプレート103間に装着されたスプリング138
により後退限にあり、エンドプレート103に当接した
状態となっている。
At this time, high pressure oil is supplied to the pressure oil chamber A (the external bearing retainer 131 forms the pressure oil chamber A between the end plate 103 and the cover 133 fixed to the same plate 103). , bearing retainer 131,1
32, the bearing 14, the ball nut 112, and the pulley 113 are at the backward limit, and the external bearing retainer 131
is in contact with the end plate 103. In addition, pressure oil chamber B (mold clamping ram 121 and end plate 1
03 to form a pressure oil chamber B. ) is released into a tank by a hydraulic circuit (not shown), and the hydraulic fluid is released into a tank by a hydraulic circuit (not shown), and
1 is a spring 138 installed between the guide plate 137 fixed to the mold clamping ram 121 and the end plate 103;
Therefore, it is at the backward limit and is in contact with the end plate 103.

この時、型締ラム121のベアリングリテイナ132と
の当接部に形成された摩擦クラッチ部135は、第1図
に示す様に約1fl程度のクリアランスを有するように
設計されている。また、前記圧油室A、Bからの油洩れ
対策として、シールパツキン150.151.152が
装着されている。
At this time, the friction clutch portion 135 formed at the contact portion of the mold clamping ram 121 with the bearing retainer 132 is designed to have a clearance of about 1 fl, as shown in FIG. Further, as a measure against oil leakage from the pressure oil chambers A and B, seal packings 150, 151, and 152 are installed.

次に型締の際の作用を説明すると、強大な力を必要とす
る型締昇圧、保持動作は、以下の作動順序で行う。
Next, to explain the operation during mold clamping, the mold clamping pressurization and holding operations, which require great force, are performed in the following order of operation.

まず、圧油室Aの圧油を図示せぬタンクに解放する。First, the pressure oil in the pressure oil chamber A is released into a tank (not shown).

次いで圧油室Bに圧油を供給すると、型締ラム121が
スプリング138を圧縮しながら前進し、摩擦クラッチ
部135が下部ベアリングリテイナ132に接触する。
Next, when pressure oil is supplied to the pressure oil chamber B, the mold clamping ram 121 moves forward while compressing the spring 138, and the friction clutch portion 135 contacts the lower bearing retainer 132.

この摩擦クラッチ部135の摩擦力により、下部ベアリ
ングリテイナ132がナツト112の回転を止め、ボー
ルナフト112、ボールスクリュ111全体を前進させ
、型締力を発生させる。
Due to the frictional force of the friction clutch portion 135, the lower bearing retainer 132 stops the rotation of the nut 112, moves the ball napft 112 and the ball screw 111 forward as a whole, and generates a mold clamping force.

即ち、型締ラム121に伝達される回転力は、エンドプ
レート103に連結されているガイドバー122によっ
て、その回転が阻止される。
That is, the rotational force transmitted to the mold clamping ram 121 is prevented from rotating by the guide bar 122 connected to the end plate 103.

以上のように、ボールナツト112の回転運動を阻止し
たまま、型締ラム121は、ベアリングリテイナ132
を介してボールナツト112、ボールスクリュ111を
、型閉側に油圧の強大な力で押し付け、型締力を得る。
As described above, the mold clamping ram 121 locks the bearing retainer 132 while preventing the rotational movement of the ball nut 112.
The ball nut 112 and the ball screw 111 are pressed against the mold closing side with a strong hydraulic force to obtain a mold clamping force.

型締動作が終了すると、圧油室Bの圧油をタンクに解放
し、圧油室Aに圧油を供給する。このとき、スプリング
138により型締ラム121は後退し、ボールナット1
12が上下ベアリングリテイナ131,132 、ベア
リング14及びプーリ113と共に後退し、型開動作に
移行する。
When the mold clamping operation is completed, the pressure oil in the pressure oil chamber B is released to the tank, and the pressure oil is supplied to the pressure oil chamber A. At this time, the mold clamping ram 121 is moved backward by the spring 138, and the ball nut 1
12 is retracted together with the upper and lower bearing retainers 131, 132, the bearing 14, and the pulley 113, and the mold opening operation begins.

なお、油抜き溝155及び油抜き溝156はシールパツ
キン151及びシールパツキン152から万一に油が洩
れて摩擦クラッチ部135が濡れることのないように設
けられたもので、摩擦クラッチ部135における摩擦係
数の大巾な低下を防ぐためのものである。
Note that the oil drain groove 155 and the oil drain groove 156 are provided to prevent oil from leaking from the seal packing 151 and the seal packing 152 and getting the friction clutch part 135 wet. This is to prevent a large drop in the coefficient.

なお、上記実施例は、ボールナツトを回転させてボール
スクリュを前後進させる場合の例であるが、逆にボール
スクリュを回転させてボールナットを前後進させること
も可能である。
Although the above embodiment is an example in which the ball nut is rotated to move the ball screw back and forth, it is also possible to reversely move the ball nut back and forth by rotating the ball screw.

(発明の効果) 以上、詳細に説明した如く本発明によれば、次に挙げる
有利な効果を奏するものである。
(Effects of the Invention) As described above in detail, the present invention provides the following advantageous effects.

(1)強大な力のみを必要とする型締圧力の発生及び制
御を油圧で行うことにより、装置が小型化し、低コスト
で、かつ正確な圧力制御が可能となる。
(1) By using hydraulic pressure to generate and control mold clamping pressure, which requires only a strong force, the device can be downsized, and accurate pressure control can be achieved at low cost.

(2)型締力をタイミングベルト、ベアリングに伝えな
いため、小型、低コストで製作できる。
(2) Since mold clamping force is not transmitted to the timing belt or bearings, it can be manufactured in a small size and at low cost.

(3)  ナツトは回転しないで、型締力を受けるため
、ボールスクリュ、ボールナンドの小型化、長寿命化が
達成できる。
(3) Since the nut does not rotate but receives mold clamping force, ball screws and ball nuts can be made smaller and have a longer service life.

(4)  型締ラムの後退時(型開時)は、スプリング
による型開方向への付勢により極めて円滑に始動される
(4) When the mold clamping ram is retracted (when the mold is opened), it is started very smoothly due to the bias in the mold opening direction by the spring.

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

第1図は本発明の実施例を示す型締装置の正面図、第2
図は第1図におけるA部の拡大詳細断面図、第3図は従
来の電動機を用いた直圧式型締機構を示す1部断面正面
図である。 図の主要部分の説明 14−・−・ベアリング 103・・−エンドプレート 111・・−ボールスクリュ 112−・ポールナット ・型開閉用電動機 タイミングベルト ・・型締ラム ・ガイドバー ベアリングリテイナ ・−摩擦クラッチ部 ガイド板 スプリング yPJ3図 型M 4′i関
Fig. 1 is a front view of a mold clamping device showing an embodiment of the present invention;
The figure is an enlarged detailed sectional view of section A in FIG. 1, and FIG. 3 is a partially sectional front view showing a conventional direct pressure type mold clamping mechanism using an electric motor. Explanation of main parts in the diagram 14 - Bearing 103 - End plate 111 - Ball screw 112 - Pole nut - Mold opening/closing electric motor timing belt - Mold clamping ram - Guide bar bearing retainer - Friction clutch Part guide plate spring yPJ3 figure M 4'i Seki

Claims (1)

【特許請求の範囲】[Claims] 型開閉用の駆動力を互いに螺合されるボールスクリュ又
はボールナットを介して可動盤に伝達する型開閉用電動
機と、前記ボールスクリュ又はボールナットに固設され
たベアリングリテイナと、型締時の型締力を油圧により
発生させる型締ラムと、型締時前記ベアリングリテイナ
に接触する同型締ラムの当接部に形成される摩擦クラッ
チ部と、前記型締ラムを常時離型方向に付勢するスプリ
ング部材とからなることを特徴とする型締装置。
A mold opening/closing electric motor transmits the driving force for mold opening/closing to a movable platen through mutually screwed ball screws or ball nuts, a bearing retainer fixed to the ball screw or ball nut, and a bearing retainer for mold clamping. A mold clamping ram that generates mold clamping force by hydraulic pressure; a friction clutch formed at the abutting portion of the mold clamping ram that contacts the bearing retainer during mold clamping; and a friction clutch portion that constantly urges the mold clamping ram in the mold release direction. A mold clamping device comprising a spring member.
JP63275447A 1988-10-31 1988-10-31 Mold clamping device Expired - Fee Related JP2525880B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63275447A JP2525880B2 (en) 1988-10-31 1988-10-31 Mold clamping device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63275447A JP2525880B2 (en) 1988-10-31 1988-10-31 Mold clamping device

Publications (2)

Publication Number Publication Date
JPH02121807A true JPH02121807A (en) 1990-05-09
JP2525880B2 JP2525880B2 (en) 1996-08-21

Family

ID=17555655

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63275447A Expired - Fee Related JP2525880B2 (en) 1988-10-31 1988-10-31 Mold clamping device

Country Status (1)

Country Link
JP (1) JP2525880B2 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0675300A2 (en) * 1994-04-02 1995-10-04 Karl Hehl Device for locking rotation of a spindle mechanism
WO1999024235A1 (en) * 1997-11-12 1999-05-20 Karl Hehl Mold closure unit for an injection molding machine
JP2003094501A (en) * 2001-09-26 2003-04-03 Toshiba Mach Co Ltd Electromotive direct pressure type mold clamping device for injection molding machine and injection molding machine
JP2016013565A (en) * 2014-07-02 2016-01-28 東芝機械株式会社 Molding device
CN112692253A (en) * 2020-12-12 2021-04-23 靖江市钜顺精密轻合金成型科技有限公司 Sliding block ejector rod mechanism of gear box die-casting die

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0675300A2 (en) * 1994-04-02 1995-10-04 Karl Hehl Device for locking rotation of a spindle mechanism
EP0675300A3 (en) * 1994-04-02 1997-06-04 Karl Hehl Device for locking rotation of a spindle mechanism.
US5811139A (en) * 1994-04-02 1998-09-22 Hehl; Karl Device for fixing a ball screw/nut mechanism safe from turning
WO1999024235A1 (en) * 1997-11-12 1999-05-20 Karl Hehl Mold closure unit for an injection molding machine
US6447284B1 (en) 1997-11-12 2002-09-10 Karl Hehl Mold closure unit for an injection molding machine
JP2003094501A (en) * 2001-09-26 2003-04-03 Toshiba Mach Co Ltd Electromotive direct pressure type mold clamping device for injection molding machine and injection molding machine
JP2016013565A (en) * 2014-07-02 2016-01-28 東芝機械株式会社 Molding device
CN112692253A (en) * 2020-12-12 2021-04-23 靖江市钜顺精密轻合金成型科技有限公司 Sliding block ejector rod mechanism of gear box die-casting die

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