JPH0899165A - Die-clamp device in forming apparatus - Google Patents

Die-clamp device in forming apparatus

Info

Publication number
JPH0899165A
JPH0899165A JP23716094A JP23716094A JPH0899165A JP H0899165 A JPH0899165 A JP H0899165A JP 23716094 A JP23716094 A JP 23716094A JP 23716094 A JP23716094 A JP 23716094A JP H0899165 A JPH0899165 A JP H0899165A
Authority
JP
Japan
Prior art keywords
mold clamping
diameter
mold
piston
small diameter
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.)
Pending
Application number
JP23716094A
Other languages
Japanese (ja)
Inventor
Iseo Kamoda
伊勢雄 鴨田
Original Assignee
Ube Ind Ltd
宇部興産株式会社
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 Ube Ind Ltd, 宇部興産株式会社 filed Critical Ube Ind Ltd
Priority to JP23716094A priority Critical patent/JPH0899165A/en
Publication of JPH0899165A publication Critical patent/JPH0899165A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To provide a die clamp device in a forming apparatus which can shift a movable disk at a high speed and can smoothly change the high speed shifting movement to the low speed shifting movement safely without shock. CONSTITUTION: The die clamping cylinder 50 has a small diameter part S on a head side and a large diameter part L on a rod side formed by dividing the inside of a cylinder 51 in the axial direction. Each of a small piston 52A and a large piston 52B is slidably arranged, and when the integrated both pistons 52A, 52B approach the advancing limit, the small diameter piston 52A leaves the small diameter part S and shifted to the large diameter part L.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、ダイカストマシンや射
出成形機などの成形装置の型締装置に係り、特に型開閉
動作が短時間で済み、可動盤の高速移動動作から低速型
締動作を円滑に切替実施できる型締シリンダを有する成
形装置の型締装置に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mold clamping device of a molding machine such as a die casting machine or an injection molding machine, and particularly, a mold opening / closing operation can be completed in a short time, and a high speed moving operation of a movable platen to a low speed mold clamping operation can be performed. The present invention relates to a mold clamping device of a molding device having a mold clamping cylinder that can be smoothly switched.

【0002】[0002]

【従来の技術】一般に射出成形機の型締装置は、ダイカ
ストマシンと同様に、高速でショックのない金型の開閉
動作と射出時の樹脂圧力に負けない締付力(型締力)が
必要とされ、方式としては直圧式とトグル式とに大別さ
れる。トグル式は型開閉時の油量が直圧式に比べて少な
く、型締力保持の際には直圧式は高圧油の供給が必要で
あるのに対し、トグル式はトグル機構の自己ロック機能
が働らくので直圧式に比べて省エネルギであるなど種々
の利点がある。図5はトグル式の型締装置を示す縦断面
図であり、中心線より上半分は型閉じ開始前の状態を、
下半分は型閉じ完了状態(トグルリンク延伸完了状態)
を示すものである。図における型締装置200は、リン
クハウジング1、固定盤(固定プラテン)2、可動盤
(可動プラテン)3、金型4(固定金型4bおよび可動
金型4a)、ベッド5、トグル機構6、クロスヘッド
7、型締シリンダ(ダイロックシリンダ)8、ピストン
ロッド9およびガイドロッド10より構成される。射出
成形機のダブルトグル式型締装置200では、図に示す
ように、可動盤3とリンクハウジング1との間に3つの
トグルリンク6a、6b、6cからなる上下一対のトグ
ル機構6を備え、リンクハウジング1の外端面の略中心
部に型締シリンダ(ダイロックシリンダ)8を装着し、
型締シリンダ8のピストンロッド9の先端をクロスヘッ
ド7に連結し、該クロスヘッド7を進退自在に挿通した
ガイドロッド10に沿って前後進させるとともに、該ク
ロスヘッド7を介して前記トグル機構6を作動させ、固
定盤2に対して可動盤(可動プラテン)3を移動して型
締動作を行うようになっている。具体的には、図6に示
すように、トグル機構6のトグルリンク6a、6b、6
cを折り畳んだ型開状態から、型締シリンダ8を前進さ
せることにより金型4が締まる。型締シリンダ8に送る
油量を調整して、高速でスムーズな型締動作を得る。金
型4がタッチする図7の直前には、金型4a、4b間に
万一製品が残っていたり、異物が入っていたりすると金
型4を破損する恐れがあり、これを避けるために、油量
と油圧を低速および低圧に設定して締める。図7の金型
がタッチした状態から、型締力を発生させて両金型4
a、4bを強固に型締するには、型締シリンダ8に高速
・高圧の油を送り、トグル機構6のトグルリンク6a、
6bを伸張状態とし、リンクハウジング1と固定盤2間
のタイバー11の長さLt を伸ばすことにより金型に型
締力を発生させる。タイバー11が伸び型締が完了した
状態は図8のとおりであり、このときトグルリンク6
a、6bは延伸完了して一直線の状態となり、自己ロッ
ク状態を形成するため型締シリンダ8に高圧油を送らな
くてもこの状態を保持するため、直圧式に比べて省エネ
ルギに優れる。型締力の調整は、図7に示す金型タッチ
の状態からのタイバー11の伸び量を変えることによっ
て行う。型締力を増やす場合には、リンクハウジング1
をさらに固定盤2方向へ前進させ、減らす場合は後退さ
せる。このリンクハウジング1の移動は、図示しないダ
イハイトモータで4本のタイバー11に締結された4本
のタイバーナットに掛け回されたチェンを駆動して行
う。その移動量はダイハイトモータの回転量で制御す
る。
2. Description of the Related Art Generally, a mold clamping device of an injection molding machine requires a high-speed and shock-free opening / closing operation of a mold and a clamping force (mold clamping force) comparable to a resin pressure at the time of injection, like a die-casting machine. The method is roughly classified into a direct pressure type and a toggle type. Compared with the direct pressure type, the toggle type requires less oil when opening and closing the mold, and the direct pressure type requires the supply of high-pressure oil when holding the mold clamping force, whereas the toggle type has a self-locking function of the toggle mechanism. Since it works, it has various advantages such as energy saving compared to the direct pressure type. FIG. 5 is a vertical cross-sectional view showing a toggle type mold clamping device. The upper half of the center line shows the state before the mold closing starts.
The lower half is in the mold closed state (toggle link extension completed state)
Is shown. The mold clamping device 200 in the figure includes a link housing 1, a fixed platen (fixed platen) 2, a movable platen (movable platen) 3, a mold 4 (a fixed mold 4b and a movable mold 4a), a bed 5, a toggle mechanism 6, It comprises a crosshead 7, a mold clamping cylinder (die lock cylinder) 8, a piston rod 9 and a guide rod 10. In the double toggle type mold clamping device 200 of the injection molding machine, as shown in the drawing, a pair of upper and lower toggle mechanisms 6 including three toggle links 6a, 6b, 6c are provided between the movable platen 3 and the link housing 1. A mold clamping cylinder (die lock cylinder) 8 is attached to the outer end surface of the link housing 1 substantially in the center thereof.
The tip of the piston rod 9 of the mold clamping cylinder 8 is connected to the crosshead 7, and the crosshead 7 is moved back and forth along the guide rod 10 that is inserted through the crosshead 7 so that the toggle mechanism 6 can be moved through the crosshead 7. Is operated to move the movable platen (movable platen) 3 with respect to the fixed platen 2 to perform the mold clamping operation. Specifically, as shown in FIG. 6, the toggle links 6 a, 6 b, 6 of the toggle mechanism 6 are
The mold 4 is tightened by advancing the mold clamping cylinder 8 from the mold open state in which c is folded. The amount of oil sent to the mold clamping cylinder 8 is adjusted to obtain a high-speed and smooth mold clamping operation. Immediately before the touch of the mold 4 in FIG. 7, if there is a product left between the molds 4a and 4b or if there is a foreign substance, the mold 4 may be damaged. Set low and low oil and oil pressures and tighten. From the state where the dies in FIG. 7 are touched, the mold clamping force is generated and the dies 4
In order to firmly clamp a and 4b, high-speed and high-pressure oil is sent to the mold clamping cylinder 8, and the toggle link 6a of the toggle mechanism 6
6b is in an extended state and the length Lt of the tie bar 11 between the link housing 1 and the fixed platen 2 is extended to generate a mold clamping force in the mold. The state in which the tie bar 11 is stretched and the mold clamping is completed is as shown in Fig. 8. At this time, the toggle link 6
Since a and 6b have been stretched and are in a straight line state and maintain this state without sending high pressure oil to the mold clamping cylinder 8 to form a self-locking state, energy saving is superior to the direct pressure type. The mold clamping force is adjusted by changing the extension amount of the tie bar 11 from the state of touching the mold shown in FIG. To increase the mold clamping force, link housing 1
Is further advanced in the direction of the fixed platen 2 and is retracted when it is reduced. The link housing 1 is moved by driving a chain wound around four tie bar nuts fastened to the four tie bars 11 by a die height motor (not shown). The amount of movement is controlled by the amount of rotation of the die height motor.

【0003】一方、直圧式の型締装置は、図9に示すよ
うに、可動盤3の4隅を貫通するタイバー11に導かれ
て可動盤3は型締シリンダ8の駆動により前後進自在と
されている。また、図10に示すように、タイバー11
をタイボルト11Aとし、タイボルト11Aを同一方向
に回転することによってタイボルト11Aと螺合する可
動盤3を前後進する構成とされ、モータ12による回転
力を減速機14を経由してタイボルト11Aの1本に伝
達し、タイボルト11Aの他の3本はスプロケット16
およびチェン18により同一方向の回転を与えることに
より、タイボルト11Aの4本とそれぞれ螺合された可
動盤3を進退動させるようになっている。
On the other hand, as shown in FIG. 9, the direct pressure type mold clamping device is guided by tie bars 11 penetrating the four corners of the movable platen 3 so that the movable platen 3 can be moved forward and backward by driving a mold clamping cylinder 8. Has been done. In addition, as shown in FIG.
Is a tie bolt 11A, and by rotating the tie bolt 11A in the same direction, the movable platen 3 which is screwed with the tie bolt 11A is moved forward and backward, and the rotational force of the motor 12 is transferred to one of the tie bolts 11A via the speed reducer 14. To the sprocket 16 and the other three tie bolts 11A.
By applying rotation in the same direction by the chain 18 and the chain 18, the movable platen 3 screwed with the four tie bolts 11A is moved back and forth.

【0004】[0004]

【発明が解決しようとする課題】以上のような従来構造
の型締装置においては、可動盤の移動の動力手段として
型締シリンダなどの油圧駆動を使用しているが、油圧駆
動方式の場合には型締シリンダを作動する油圧ユニット
中に図11に示すように多くの制御弁や油圧配管があ
り、これらの機器に発生する油漏れや圧力損失による効
率低下が生じていた。また、油圧駆動の代わりに電動駆
動方式を採用した場合には、可動盤移動の動力としてタ
イボルトを回転駆動するために、減速機やチェン伝動ま
たはベルト伝動による間接駆動であったため、全体構造
が複雑となり、成形装置の占める空間も大きくなり省ス
ペースの観点から難点があった。また、可動盤を電動駆
動で開閉および型締するには大きな電動機仕様が必要と
なり、これを軽減するためにタイボルトにボールネジ機
構を採用したとしても、可動盤の移動は円滑に実施でき
るけれども大型の成形装置では型締力相当の大きなボー
ルネジ回転トルクが必要となり、必然的にボールネジ径
は大径とすることが必要となるので、機器の大型化の障
害となっていた。本発明では、このような課題を解決
し、可動盤の移動の際には比較的小さな力で高速に移動
させ、移動完了直前(両金型接触の直前)に、低速で、
かつ、大出力が出るような型締装置を目的としている。
In the mold clamping device having the conventional structure as described above, the hydraulic drive of the mold clamping cylinder or the like is used as the power means for moving the movable plate, but in the case of the hydraulic drive system. As shown in FIG. 11, there are many control valves and hydraulic pipes in the hydraulic unit that operates the mold clamping cylinders, and oil leakage and pressure loss that occur in these devices cause a decrease in efficiency. When an electric drive system is used instead of hydraulic drive, the tie bolt is driven to rotate as power for moving the movable platen, and the drive is indirectly driven by a speed reducer, chain drive, or belt drive, so the overall structure is complicated. As a result, the space occupied by the molding apparatus becomes large, and there is a difficulty in saving space. In addition, a large electric motor specification is required to open and close and mold-clamp the movable plate by electric drive, and even if a ball screw mechanism is adopted for the tie bolts to reduce this, the movable plate can be moved smoothly but is large. The molding apparatus requires a large ball screw rotation torque equivalent to the mold clamping force, and inevitably requires a large ball screw diameter, which has been an obstacle to increasing the size of the equipment. In the present invention, such a problem is solved, when the movable platen is moved, it is moved at a high speed with a relatively small force, and immediately before the completion of the movement (immediately before contact between the two dies), at a low speed,
Moreover, it is intended for a mold clamping device that produces a large output.

【0005】[0005]

【課題を解決するための手段】このような課題を解決す
るために、本発明においては、第1の発明では、固定盤
に対して可動盤を接離自在に配設し、該可動盤を直接ま
たはトグル機構を介して押圧し移動・型締させる型締シ
リンダを備えた直圧式またはトグル式の成形装置の型締
装置において、該型締シリンダは軸方向に各々区画され
たヘッド側の小径部とロッド側の大径部を有し、該小径
部と該大径部の内部には各々軸方向に摺動自在な小径ピ
ストンと大径ピストンが配設されるとともに、該両ピス
トンは連結ロッドを介して接続されるかまたは直接接合
され、かつ、一体化された該両ピストンが前進限近傍に
達した際に該小径ピストンが前記型締シリンダの小径部
を離脱して大径部へ移動する構成とした。また、第2の
発明では、さらに、小径ピストンが前進限近傍に達した
際に型締シリンダの小径部の作動油が大径部へ連通する
導油路を該小径部のシリンダに穿設した。
In order to solve such a problem, in the present invention, in the first aspect of the present invention, the movable plate is arranged so as to be freely contactable and separable with respect to the fixed plate, and the movable plate is attached. In a mold clamping device of a direct pressure type or toggle type molding device equipped with a mold clamping cylinder that is moved or clamped by pressing directly or through a toggle mechanism, the mold clamping cylinder has a small diameter on the head side that is partitioned in the axial direction. Section and a large diameter section on the rod side, and a small diameter piston and a large diameter piston which are slidable in the axial direction are respectively disposed inside the small diameter section and the large diameter section, and the two pistons are connected. The small-diameter pistons leave the small-diameter portion of the mold clamping cylinder and move to the large-diameter portion when both pistons connected or directly joined via a rod and integrated with each other reach near the forward limit. It is configured to move. Further, according to the second aspect of the invention, an oil passage for communicating hydraulic oil in the small diameter portion of the mold clamping cylinder to the large diameter portion is formed in the cylinder of the small diameter portion when the small diameter piston reaches the vicinity of the forward limit. .

【0006】[0006]

【作用】本発明においては、型開状態から型閉状態に向
かって可動盤を移動する時には型締シリンダのヘッド側
の小径部へ作動油を導入し、小径ピストンを前進させる
ことによってピストンロッドを前進させ、トグル式型締
装置においてはクロスヘッドを、直圧式型締装置におい
ては直接可動盤を前進方向(型閉方向)へ移動させる。
可動盤の移動が進行し、可動盤の可動金型と固定盤の固
定金型とが接触する直前になると、第1の発明では、小
径ピストンが小径部から大径部へ移動し、小径部と大径
部とが連通し、第2の発明では、導油路によって小径部
と大径部とが連通し、ピストンロッドを前進させる型締
シリンダ内の受圧面積が小径ピストンから大径ピストン
に拡大し、今まで前進してきたピストンロッドは急に減
速されてから両金型が接触して可動盤が停止するととも
に、押圧力が増大し型締力として作用する。
In the present invention, when moving the movable plate from the mold open state to the mold closed state, the working oil is introduced into the small diameter portion on the head side of the mold clamping cylinder, and the small diameter piston is moved forward to move the piston rod. The crosshead is moved forward in the toggle type mold clamping device, and the movable platen is moved directly in the forward direction (mold closing direction) in the direct pressure type mold clamping device.
Just before the movable platen moves and the movable platen movable mold and the fixed platen fixed mold come into contact with each other, in the first invention, the small diameter piston moves from the small diameter part to the large diameter part, and the small diameter part moves. And the large-diameter portion communicate with each other, and in the second invention, the small-diameter portion and the large-diameter portion communicate with each other by the oil guide passage, and the pressure receiving area in the mold clamping cylinder for advancing the piston rod changes from the small-diameter piston to the large-diameter piston. The piston rod, which has been expanded and has been advanced so far, is suddenly decelerated, and then both dies come into contact with each other to stop the movable plate, and the pressing force increases to act as a mold clamping force.

【0007】[0007]

【実施例】以下図面に基づいて本発明の実施例の詳細に
ついて説明する。図1〜図4は本発明の実施例に係り、
図1は型締シリンダの縦断面図、図2〜図3は他の実施
例に係る型締シリンダの縦断面図、図4は直圧式型締装
置の斜視図である。図1に示すものは、第1の発明の実
施例に係る型締シリンダ50で、型締シリンダ50のシ
リンダ51はヘッド側の小径部Sとロッド側の大径部L
に区画され、小径部S(直径D1 )には直径D1 の小ピ
ストン52Aが、大径部L(直径D 2 )には直径D2
大ピストン52Bが軸方向摺動自在に配設され、小ピス
トン52Aと大ピストン52Bとは連結ロッド54によ
って接合され一体となって軸方向に移動自在とされる。
さらに大ピストン52Bのロッド側(図面右側)にはピ
ストンロッド53が連接され、両ピストン52A、52
Bと一体的に軸方向に移動する。シリンダ51の側壁に
はシリンダ51内へ作動油を給排する3つの油路(ヘッ
ド側油路55a、中間油路55b、ロッド側油路55
c)が配設される。ピストンロッド53の先端はクロス
ヘッド7と接合される(トグル式)か、または直接可動
盤3に連結される(直圧式)。一方、シリンダ51のロ
ッド側油路55cとヘッド側油路55aは各々電磁弁
(4ポート切換弁)80に接続される。また中間油路5
5bは逆止弁90を経由して油タンク100へ接続され
る。電磁弁80のポートのひとつは電動機70aで駆動
される油圧ポンプ70と接続される。72はリリーフ
弁、74は圧力調整弁である。
Embodiments of the present invention will now be described in detail with reference to the drawings.
explain about. 1 to 4 relate to an embodiment of the present invention,
FIG. 1 is a vertical cross-sectional view of a mold clamping cylinder, and FIGS.
FIG. 4 is a vertical sectional view of a mold clamping cylinder according to an example, and FIG.
It is a perspective view of a table. What is shown in FIG. 1 is the fruit of the first invention.
With the mold clamping cylinder 50 according to the embodiment, the mold clamping cylinder 50
The binder 51 has a small diameter portion S on the head side and a large diameter portion L on the rod side.
Divided into small diameter parts S (diameter D1) Has a diameter D1Small pie
The stone 52A has a large diameter portion L (diameter D 2) Has a diameter D2of
The large piston 52B is arranged so as to be slidable in the axial direction.
The ton 52A and the large piston 52B are connected by a connecting rod 54.
Are joined together to form an integral unit that is movable in the axial direction.
Furthermore, on the rod side (right side in the drawing) of the large piston 52B,
The stone rod 53 is connected to the pistons 52A and 52A.
It moves in the axial direction together with B. On the side wall of the cylinder 51
Are three oil passages (heads) that supply and discharge hydraulic oil to and from the cylinder 51.
Oil passage 55a, intermediate oil passage 55b, rod oil passage 55
c) is provided. The tip of the piston rod 53 is a cross
Joined with head 7 (toggle type) or directly movable
Connected to the board 3 (direct pressure type). On the other hand, the cylinder 51
The oil passage 55c on the head side and the oil passage 55a on the head side are each solenoid valves.
(4 port switching valve) 80 is connected. In addition, the intermediate oil passage 5
5b is connected to the oil tank 100 via the check valve 90
It One of the ports of the solenoid valve 80 is driven by the electric motor 70a
Connected to the hydraulic pump 70. 72 is relief
The valve 74 is a pressure regulating valve.

【0008】以上のように構成された型締シリンダ50
の作動について説明する。まず、型開状態から型閉状態
に向かって可動盤3を移動する時には、電磁弁80ソレ
ノイドAを励磁し、圧力調整弁74で調圧された作動油
をヘッド側油路55aを経由して小径部Sへ供給する。
ピストンロッド53は作動油に押圧され前進し可動盤3
は型閉動作を行う。可動盤3の前進が進展し、前進限近
傍に達するとシリンダ51内の小ピストン52Aの位置
が前進側へ移動(図1の右方向)する結果、今まで小径
部Sにあった小ピストン52Aは図1の二点鎖線で示し
たように大径部Lへ移動する結果、作動油はヘッド側へ
連通し、作動油の流入容積が急激に増大する結果ピスト
ンロッド53の前進速度は急に減速される。そして、可
動盤3の可動金型4aが固定盤2の固定金型4bにタッ
チして可動盤3が停止した後、シリンダ51内のピスト
ンロッド53の前進方向の受圧面積は(π/4)・D1 2
から(π/4)・D2 2へ増大するから、同一圧力の作動
油によって大きな前進力、すなわち、型締力が可動盤3
へ働くことになる。トグル式型締装置においては、可動
盤3の移動に際して摺動抵抗に打ち克つだけの小さな力
(例えば、可動盤重量20トンに摩擦係数0.2を乗じ
た4トン程度の力)があればよいが、型締力1000ト
ンを与えるためにはトグル機構を使うことによって軽減
される割合の1/20〜1/30の力、すなわち4トン
の約10倍の30〜50トンの大きな力が必要となる
が、本発明の型締シリンダ50にあっては、移動時と型
締時で何ら作動油の圧力を高める必要はなく、受圧面積
の増大で対処できることになる(シリンダ51の大径部
Lの内径D2 を小径部Sの内径D1 の10の平方根倍以
上とする)。大径部Lのシリンダ51の内径D2 に対す
る小径部Sのシリンダ51の内径D 1 の比や小径部Sと
大径部Lの境界の位置は、型締装置の仕様(型番、型締
力、可動盤摺動抵抗など)を考慮して自由に選定できる
ことは言うまでもない。型締工程が終了して型開する時
には、電磁弁80のソレノイドBが励磁され、大ピスト
ン52Bは後退側に押圧され、ヘッド側の作動油はパイ
ロット逆止弁90が開放され油タンク100へ戻され
る。なお、小径部Sと大径部Lとの境界には図1に示す
ように面取りをしておくと、小径部Sを離脱して大径部
Lへ移動した小ピストン52Aが、型開動作の時大径部
Lから小径部Sへ円滑に嵌入することができる。
The mold clamping cylinder 50 constructed as described above
The operation of will be described. First, from the mold open state to the mold closed state
When moving the movable platen 3 toward the solenoid valve 80 solenoid
Hydraulic oil that excites the noid A and is regulated by the pressure regulating valve 74
Is supplied to the small diameter portion S via the head side oil passage 55a.
The piston rod 53 is pressed by the hydraulic oil and moves forward to move the movable platen 3.
Performs the mold closing operation. The forward movement of the movable platen 3 progresses, and the forward movement is approaching the limit.
The position of the small piston 52A inside the cylinder 51
Moves toward the forward side (to the right in Fig. 1), resulting in a smaller diameter
The small piston 52A in the portion S is shown by the chain double-dashed line in FIG.
As a result of moving to the large diameter portion L as described above, the hydraulic oil moves to the head side.
Communication, resulting in a sudden increase in the hydraulic oil inflow volume
The forward speed of the rod 53 is suddenly reduced. And yes
The movable mold 4a of the moving platen 3 is touched to the fixed mold 4b of the fixed platen 2.
After the movable platen 3 has stopped, the piston in the cylinder 51
The pressure receiving area of the rod 53 in the forward direction is (π / 4) D1 2
From (π / 4) ・ D2 2To the same pressure
A large forward force, that is, the mold clamping force is generated by the oil on the movable platen 3.
Will work to. Movable in toggle type mold clamping device
A small force that overcomes the sliding resistance when the board 3 moves
(For example, multiply the weight of the movable plate by 20 tons by a friction coefficient of 0.2.
Force of about 4 tons) is required, but mold clamping force of 1000 tons
Mitigation by using a toggle mechanism to give
1/20 to 1/30 of the force applied, that is, 4 tons
A large force of 30 to 50 tons, which is about 10 times that of
However, in the mold clamping cylinder 50 of the present invention,
There is no need to increase the pressure of hydraulic oil when tightening,
Can be dealt with by increasing (the large diameter portion of the cylinder 51
Inner diameter of L D2Is the inner diameter D of the small diameter portion S1Square root of 10 or more
Above). Inner diameter D of cylinder 51 of large diameter portion L2Against
Inner diameter D of the cylinder 51 of the small diameter portion S 1Ratio and small diameter part S
The position of the boundary of the large diameter portion L is determined by the specifications of the mold clamping device (model number, mold clamping
Force, sliding resistance of movable plate, etc.)
Needless to say. When the mold is closed and the mold is opened
Solenoid B of solenoid valve 80 is excited to
52B is pressed backwards, and the hydraulic oil on the head side is
The lot check valve 90 is opened and returned to the oil tank 100.
It The boundary between the small diameter portion S and the large diameter portion L is shown in FIG.
If chamfered like this, the small diameter part S is separated and the large diameter part is removed.
The small piston 52A that has moved to L has a large diameter when the mold is opened.
The small diameter portion S can be smoothly fitted from L.

【0009】図2は本発明の他の実施例を示し(第2の
発明に相当)、図1と異なる点についてのみ述べると型
締シリンダ60は、小径部S内を摺動する小ピストン5
2Aが前進限近くに移動した時、小径部Sの作動油が大
径部Lへ連通する導油路56をシリンダ61内に穿設し
たもので、図1の型締シリンダ50と同一の機能を保有
するばかりでなく、小ピストン52Aが小径部Sを完全
に離脱することなくピストンロッド53を減速できるの
で、型開動作に戻る時小ピストン52Aは小径部S内を
円滑に逆動作できるという利点がある。図3は、図1の
型締シリンダ50の軸方向長さを短縮して小径化を図っ
たもので、連結ロッド54を廃止して小ピストン52A
と大ピストン52Bを直接連結したものである。図3の
型締シリンダ50Aは、図2のように、導油路56を設
けたタイプとすることもできる。図1や図2に示す型締
シリンダ50、60はピストンロッド53の先端をクロ
スヘッド7に接続してトグル式の型締装置に採用される
ばかりでなく、シリンダ51、61を固定盤2に固設
し、ピストンロッド53を可動盤3に連結する直圧式の
型締装置にも採用することができる。図4は型締シリン
ダ50を直圧式の型締装置に使用した実施例を示してい
る。
FIG. 2 shows another embodiment of the present invention (corresponding to the second invention), and only different points from FIG. 1 will be described. The mold clamping cylinder 60 has a small piston 5 sliding in the small diameter portion S.
When the 2A moves near the forward limit, the oil guide path 56 through which the hydraulic oil of the small diameter portion S communicates with the large diameter portion L is bored in the cylinder 61, and has the same function as the mold clamping cylinder 50 of FIG. In addition, since the small piston 52A can decelerate the piston rod 53 without completely separating the small diameter portion S, the small piston 52A can smoothly reverse in the small diameter portion S when returning to the mold opening operation. There are advantages. FIG. 3 shows the mold clamping cylinder 50 of FIG. 1 whose axial length is shortened to reduce the diameter thereof. The connecting rod 54 is eliminated and the small piston 52A is eliminated.
And the large piston 52B are directly connected to each other. The mold clamping cylinder 50A shown in FIG. 3 may be of a type provided with an oil guide path 56 as shown in FIG. The mold clamping cylinders 50 and 60 shown in FIG. 1 and FIG. 2 are not only adopted in a toggle type mold clamping device by connecting the tip of the piston rod 53 to the crosshead 7, but the cylinders 51 and 61 are fixed to the fixed platen 2. It can also be adopted in a direct pressure type mold clamping device that is fixed and connects the piston rod 53 to the movable platen 3. FIG. 4 shows an embodiment in which the mold clamping cylinder 50 is used in a direct pressure type mold clamping device.

【0010】以上説明したように、本発明の型締装置に
おいては、可動盤が前進限近くで高速から低速で何ら外
部指令を伴うことなく自動的に減速されるから、両金型
が当接する際の衝撃が少なく機器損傷の惧れが少なく安
全であり、かつ、型締時にも作動油圧力をこれまで以上
に高圧にすることなく大きな型締力を発生させるので省
エネルギ効果が高い。また、油圧回路も図11に示すよ
うに、高速化を達成させるためのランアラウンド回路な
ど従来のものに比べて、シンプルな構成とすることがで
きるからイニシァルコストが低いなどのメリットがあ
る。
As described above, in the mold clamping device of the present invention, the movable platen is automatically decelerated from high speed to low speed near the forward limit without any external command, so that the two molds come into contact with each other. It is safe with less impact on the machine and less likely to damage equipment, and has a high energy-saving effect because it generates a large mold clamping force without increasing the hydraulic oil pressure even during mold clamping. Further, as shown in FIG. 11, the hydraulic circuit has a merit that the initial cost is low because it can have a simple structure as compared with a conventional one such as a run-around circuit for achieving high speed.

【0011】[0011]

【発明の効果】以上述べたように、本発明においては、
型閉時の高速運転が可能で、かつ、金型接触時の衝撃が
少なく、比較的低油圧で大きな型締力を得ることができ
るほか、油圧回路もシンプルとなり設備費が小さい。
As described above, according to the present invention,
High-speed operation is possible when the mold is closed, there is little impact when contacting the mold, a large mold clamping force can be obtained with a relatively low hydraulic pressure, and the hydraulic circuit is simple and the equipment cost is low.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の実施例に係る型締シリンダの縦断面図
である。
FIG. 1 is a vertical sectional view of a mold clamping cylinder according to an embodiment of the present invention.

【図2】本発明の他の実施例に係る型締シリンダの縦断
面図である。
FIG. 2 is a vertical sectional view of a mold clamping cylinder according to another embodiment of the present invention.

【図3】本発明の他の実施例に係る型締シリンダの縦断
面図である。
FIG. 3 is a vertical sectional view of a mold clamping cylinder according to another embodiment of the present invention.

【図4】本発明の実施例に係る直圧式の型締装置の斜視
図である。
FIG. 4 is a perspective view of a direct pressure type mold clamping device according to an embodiment of the present invention.

【図5】従来のトグル式型締装置の側断面図である。FIG. 5 is a side sectional view of a conventional toggle type mold clamping device.

【図6】従来のトグル式型締装置の平面図である。FIG. 6 is a plan view of a conventional toggle type mold clamping device.

【図7】従来のトグル式型締装置の説明図(平面図)で
ある。
FIG. 7 is an explanatory view (plan view) of a conventional toggle type mold clamping device.

【図8】従来のトグル式型締装置の説明図(平面図)で
ある。
FIG. 8 is an explanatory view (plan view) of a conventional toggle type mold clamping device.

【図9】従来の直圧式型締装置の概略斜視図である。FIG. 9 is a schematic perspective view of a conventional direct pressure type mold clamping device.

【図10】従来の他の直圧式型締装置の概略斜視図であ
る。
FIG. 10 is a schematic perspective view of another conventional direct pressure type mold clamping device.

【図11】従来の型締シリンダの油圧回路図(ランアラ
ウンド回路図)である。
FIG. 11 is a hydraulic circuit diagram (runaround circuit diagram) of a conventional mold clamping cylinder.

【符号の説明】[Explanation of symbols]

1 リンクハウジング 2 固定盤 2a タイボルト固定板 2A 固定盤 2N ナット 3 可動盤 4 金型 4a 可動金型 4b 固定金型 5 ベッド 6 トグル機構 6a、6b、6c トグルリンク 7 クロスヘッド 7a 固定ナット 8 型締シリンダ 9 ピストンロッド 10 ガイドロッド 11 タイバー 11A タイボルト 11B 摺動ブッシュ 12 モータ 14 減速機 16 スプロケット 18 チェン 50 型締シリンダ 50A 型締シリンダ 51 シリンダ 52A 小ピストン 52B 大ピストン 53 ピストンロッド 54 連結ロッド 55a ヘッド側油路 55b 中間油路 55c ロッド側油路 56 導油路 60 型締シリンダ 61 シリンダ 70 油圧ポンプ 70a 電動機 72 リリーフ弁 74 圧力調整弁 80 電磁弁 90 逆止弁(パイロット逆止弁) 100 油タンク 200 型締装置 D1 小径部内径(小ピストン直径) D2 大径部内径(大ピストン直径) S 小径部 L 大径部1 link housing 2 fixed plate 2a tie bolt fixed plate 2A fixed plate 2N nut 3 movable plate 4 mold 4a movable mold 4b fixed mold 5 bed 6 toggle mechanism 6a, 6b, 6c toggle link 7 crosshead 7a fixed nut 8 mold clamp Cylinder 9 Piston rod 10 Guide rod 11 Tie bar 11A Tie bolt 11B Sliding bush 12 Motor 14 Reducer 16 Sprocket 18 Chain 50 Mold clamping cylinder 50A Mold clamping cylinder 51 Cylinder 52A Small piston 52B Large piston 53 Piston rod 54 Connecting rod 55a Head side oil Line 55b Intermediate oil line 55c Rod side oil line 56 Oil guide line 60 Mold clamping cylinder 61 Cylinder 70 Hydraulic pump 70a Electric motor 72 Relief valve 74 Pressure adjusting valve 80 Solenoid valve 90 Check valve (pilot check valve) 100 oil tank 200 mold clamping device D 1 small diameter inner diameter (small piston diameter) D 2 large diameter inner diameter (large piston diameter) S small diameter L large diameter

Claims (2)

    【特許請求の範囲】[Claims]
  1. 【請求項1】 固定盤に対して可動盤を接離自在に配設
    し、該可動盤を直接またはトグル機構を介して押圧し移
    動・型締させる型締シリンダを備えた直圧式またはトグ
    ル式の成形装置の型締装置において、該型締シリンダは
    軸方向に各々区画されたヘッド側の小径部とロッド側の
    大径部を有し、該小径部と該大径部の内部には各々軸方
    向に摺動自在な小径ピストンと大径ピストンが配設され
    るとともに、該両ピストンは連結ロッドを介して接続さ
    れるかまたは直接接合され、かつ、一体化された該両ピ
    ストンが前進限近傍に達した際に該小径ピストンが前記
    型締シリンダの小径部を離脱して大径部へ移動すること
    を特徴とする成形装置の型締装置。
    1. A direct pressure type or toggle type equipped with a mold clamping cylinder in which a movable plate is arranged so as to come in contact with and separate from a fixed plate, and the movable plate is moved or clamped by directly or via a toggle mechanism. In the mold clamping device of the molding apparatus, the mold clamping cylinder has a small diameter portion on the head side and a large diameter portion on the rod side that are respectively partitioned in the axial direction, and the small diameter portion and the large diameter portion are respectively inside. A small-diameter piston and a large-diameter piston that are slidable in the axial direction are provided, and both pistons are connected or directly joined via a connecting rod, and the two integrated pistons have a forward limit. A mold clamping device of a molding apparatus, wherein the small diameter piston moves out of the small diameter part of the mold clamping cylinder and moves to the large diameter part when reaching the vicinity.
  2. 【請求項2】 小径ピストンが前進限近傍に達した際に
    型締シリンダの小径部の作動油が大径部へ連通する導油
    路を該小径部のシリンダに穿設した請求項1記載の成形
    装置の型締装置。
    2. An oil guide passage through which hydraulic oil in the small diameter portion of the mold clamping cylinder communicates with the large diameter portion when the small diameter piston reaches the vicinity of the forward limit, is bored in the small diameter portion of the cylinder. Mold clamping device for molding equipment.
JP23716094A 1994-09-30 1994-09-30 Die-clamp device in forming apparatus Pending JPH0899165A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP23716094A JPH0899165A (en) 1994-09-30 1994-09-30 Die-clamp device in forming apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP23716094A JPH0899165A (en) 1994-09-30 1994-09-30 Die-clamp device in forming apparatus

Publications (1)

Publication Number Publication Date
JPH0899165A true JPH0899165A (en) 1996-04-16

Family

ID=17011289

Family Applications (1)

Application Number Title Priority Date Filing Date
JP23716094A Pending JPH0899165A (en) 1994-09-30 1994-09-30 Die-clamp device in forming apparatus

Country Status (1)

Country Link
JP (1) JPH0899165A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011037187A (en) * 2009-08-17 2011-02-24 Meiki Co Ltd Mold clamping device and method of operating the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011037187A (en) * 2009-08-17 2011-02-24 Meiki Co Ltd Mold clamping device and method of operating the same

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