JP2808246B2 - Mold clamping device of molding machine - Google Patents
Mold clamping device of molding machineInfo
- Publication number
- JP2808246B2 JP2808246B2 JP26104694A JP26104694A JP2808246B2 JP 2808246 B2 JP2808246 B2 JP 2808246B2 JP 26104694 A JP26104694 A JP 26104694A JP 26104694 A JP26104694 A JP 26104694A JP 2808246 B2 JP2808246 B2 JP 2808246B2
- Authority
- JP
- Japan
- Prior art keywords
- mold
- mold clamping
- cylinder
- closing
- opening
- 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.)
- Expired - Fee Related
Links
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
Description
【０００１】[0001]
【産業上の利用分野】この発明は、合成樹脂あるいはゴ
ムなどの射出成形等に使用される成形機の型締装置に関
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 for a molding machine used for injection molding of synthetic resin or rubber.
【０００２】型開閉時における型締シリンダの前室及び
後室の油圧抵抗を減少する手段として、シリンダ前室の
前端部内周を他の部分より小径に形成した型締シリンダ
と、上記前端部内周と適合しかつ他の部分の内周壁との
間には流通間隙を形成する所要外径の型締ピストンと一
体の型締ラムとを採用した型締装置が特開平１−２９１
９１７号公報、特開昭４７−２２４５７号公報などに記
載されている。As means for reducing the hydraulic resistance of the front and rear chambers of the mold closing cylinder during opening and closing of the mold, a mold closing cylinder in which the front end inner periphery of the cylinder front chamber is formed to have a smaller diameter than other parts, Japanese Patent Application Laid-Open No. 1-291 discloses a mold clamping apparatus which employs a clamping piston having a required outer diameter and an integral clamping ram for forming a flow gap between the inner peripheral wall of the other part and the inner peripheral wall.
917 and JP-A-47-22457.
【０００３】[0003]
【発明が解決しようとする課題】上記型締装置は、型締
ピストンの周囲の流通間隙によりピストン移動時の摺動
抵抗はほとんどゼロに近く。またピストン移動方向の圧
油もその流通間隙より反対側の油室に流動するため油の
圧損による圧力上昇もほとんどゼロに近い。このため型
開閉が高速となる利点を有する。In the above mold clamping device, the sliding resistance during the movement of the piston is almost zero due to the flow gap around the mold clamping piston. The pressure oil in the piston movement direction also flows to the oil chamber on the opposite side of the flow gap, so that the pressure rise due to oil pressure loss is almost zero. Therefore, there is an advantage that the mold opening and closing speed is high.
【０００４】しかしながら、特開昭４７−２２４５７号
公報に記載の型締装置では、ブースターラムを型締ラム
よりも小径にして、型締シリンダ内のピストンの後部受
圧面積を前部受圧面積よりも大きく形成し、そこに生ず
る差圧によりピストンを高速移動して型閉を行い、高速
型開はブースターラムにより行っている。また特開昭４
７−２２４５７号公報に記載の型締装置は、ピストンの
後部受圧面積と前部受圧面積は同一であるが、開閉シリ
ンダのピストンの前後受圧面積には差を有する。However, in the mold clamping device described in Japanese Patent Application Laid-Open No. 47-22457, the booster ram has a smaller diameter than the mold clamping ram, and the rear pressure receiving area of the piston in the mold clamping cylinder is larger than the front pressure receiving area. It is formed large and the piston is moved at high speed by the differential pressure generated there to close the mold, and the high-speed mold opening is performed by a booster ram. See also
In the mold clamping device described in JP-A-7-22457, the rear pressure receiving area and the front pressure receiving area of the piston are the same, but the front and rear pressure receiving areas of the piston of the opening / closing cylinder have a difference.
【０００５】このような差圧による移動では、ピストン
前後面の面積を同一とする型開閉装置に採用されてい
る、サーボバルブを使用したクローズド制御により高速
度、高応答加減速特性を得ることができない。このため
型開閉速度に制限を受ける課題を有する。[0005] In the movement by such a differential pressure, high speed and high response acceleration / deceleration characteristics can be obtained by closed control using a servo valve, which is employed in a mold opening / closing device having the same area on the front and rear surfaces of the piston. Can not. Therefore, there is a problem that the mold opening / closing speed is limited.
【０００６】この発明の目的は、上記構成の型締シリン
ダであっても、サーボバルブを使用したクローズド制御
により高速度、高応答性加減速特性を得ることができる
新たな構成の型締装置を提供することにある。SUMMARY OF THE INVENTION An object of the present invention is to provide a mold clamping device having a new structure capable of obtaining high speed and high responsive acceleration / deceleration characteristics by closed control using a servo valve, even with the mold clamping cylinder having the above structure. To provide.
【０００７】[0007]
【問題点を解決するための手段】上記目的によるこの発
明の第１の特徴は、前室の前端部内周の径を他の部分よ
り小径に形成した型締シリンダと、該型締シリンダの後
端部に連設した型開シリンダと、上記前端部内周と適合
しかつ他の部分の内周壁との間には流通間隙を形成する
所要外径の型締ピストンと一体の型締ラムと、その型締
ラムと同径で型締ピストンから上記型開シリンダに延設
され、内部が早送りピストンを備える型閉シリンダに形
成された型開閉ラムとからなり、上記型締ピストンの前
後面の面積を同径の上記型締ラムと型開閉ラムとにより
同一面積に形成するとともに、上記型開シリンダと型閉
シリンダの断面積を略同一に形成してなることにある。A first feature of the present invention for the above object is that a front end of the front chamber has a smaller inner diameter than the other part, A mold-opening cylinder connected to an end, a mold-clamping ram integral with a mold-clamping piston having a required outer diameter that is compatible with the inner periphery of the front end and forms a flow gap between the inner peripheral wall of the other portion, A mold opening / closing ram having the same diameter as the mold clamping ram and extending from the mold clamping piston to the mold opening cylinder, and having a mold opening / closing ram formed inside a mold closing cylinder having a rapid-feed piston; Are formed in the same area by the mold clamping ram and the mold opening / closing ram having the same diameter, and the sectional areas of the mold opening cylinder and the mold closing cylinder are formed substantially the same.
【０００８】またこの発明の第２の特徴は、前端部の内
周の径を他の部分より小径に形成した型締シリンダと、
上記前端部内周と適合しかつ他の部分の内周壁との間に
は流通間隙を形成する所要外径の型締ピストンと一体の
型締ラムと、その型締ラムと同径で型締ピストンから型
締シリンダの外部に延設された軸部と、型締シリンダと
可動盤とにわたり設けた開閉シリンダ及び該開閉シリン
ダに貫設した開閉ロッドと一体の開閉ピストンとからな
り、上記型締ピストンの前後面の面積を同径の上記型締
ラムと軸部材とにより同一面積に形成するとともに、上
記型開閉ピストンの前後面の面積を開閉ピストン前後の
開閉ロッドの外径を同じくして略同一に形成してなるこ
とにある。[0008] A second feature of the present invention is that a mold clamping cylinder in which the diameter of the inner periphery of the front end portion is smaller than that of the other portion,
A clamping ram integral with the clamping piston having a required outer diameter, which is adapted to form the flow gap between the inner periphery of the front end portion and the other peripheral wall, and a clamping piston having the same diameter as the clamping ram. A shaft portion extending from the mold clamping cylinder to the outside, an opening / closing cylinder provided over the mold clamping cylinder and the movable plate, and an opening / closing piston integral with the opening / closing rod penetrating the opening / closing cylinder. The front and rear surfaces of the mold clamping ram and the shaft member are formed to have the same area by the same diameter, and the front and rear surfaces of the mold opening / closing piston are substantially the same in outer diameter of the opening / closing rod before and after the opening / closing piston. It is to be formed in.
【０００９】[0009]
【作 用】上記構成では、型開閉移動時における型締ピ
ストン前後の圧油がピストン周囲の流通間隙から、何れ
か一方に押し出されるように流入するので、移動方向の
圧油による油圧抵抗は殆ど無視できるものとなり、また
流通間隙によりシリンダ内壁との摺動抵抗もなくなるの
で、それらの抵抗による速度制限はなくなる。[Operation] In the above configuration, the pressure oil before and after the mold-clamping piston during the mold opening / closing movement flows from the flow gap around the piston so as to be pushed out to one of them, so that the hydraulic resistance due to the pressure oil in the moving direction is almost zero. Since it becomes negligible and the sliding gap with the inner wall of the cylinder is eliminated by the flow gap, the speed is not limited by the resistance.
【００１０】また型締ピストンの前後面の面積及び型開
閉シリンダの断面積を略同一に形成したので、サーボバ
ルブによるメータイン、メータアウトの制御がスムーズ
に行われ、しかも型締シリンダ内の摺動抵抗及び油圧抵
抗の低減と相俟って、クローズド制御により型開閉を高
速度で、高応答の加減速で円滑動作する。Further, since the front and rear surfaces of the mold clamping piston and the sectional area of the mold opening / closing cylinder are formed to be substantially the same, meter-in and meter-out can be smoothly controlled by the servo valve, and the sliding inside the mold-clamping cylinder can be performed. Coupled with the reduction of the resistance and the hydraulic resistance, the closed control enables smooth opening and closing of the mold at a high speed and a high response acceleration / deceleration.
【００１１】[0011]
【実施例】図１及び図２は、この発明の第１の実施例を
示し、また図３は第２の実施例を示すものであるが、同
一部分は同一符号をもって説明する。図中１は型締シリ
ンダで、前端部２の内周の径を他の部分より小径に形成
してある。また前端部２とその後方の大径のシリンダ後
室３との境にはテーパーリング４が嵌装してあり、この
テーパーリング４の前後のシリンダ壁に貫設した油通路
５，６に型締及び強力型開用の油圧回路７が接続してあ
る。1 and 2 show a first embodiment of the present invention, and FIG. 3 shows a second embodiment. The same parts will be described with the same reference numerals. In the figure, reference numeral 1 denotes a mold clamping cylinder in which the diameter of the inner periphery of the front end portion 2 is formed smaller than the other portions. A tapered ring 4 is fitted at the boundary between the front end 2 and the large-diameter cylinder rear chamber 3 behind the front end 2, and the oil passages 5 and 6 penetrate through the cylinder walls before and after the tapered ring 4. A hydraulic circuit 7 for clamping and opening the strong mold is connected.
【００１２】８は上記型締シリンダ１の後端部に連設し
た型開シリンダで、内部中央に早送りピストン９が後端
を蓋部材８ａに固定して設けてあり、シリンダ壁に穿設
した型開シリンダ８の前室１０と早送りピストン９の油
通路１１，１２に型開閉用の油圧回路１３が接続してあ
る。Reference numeral 8 denotes a mold opening cylinder connected to the rear end of the mold clamping cylinder 1. A rapid feed piston 9 is provided at the center of the inside with the rear end fixed to the lid member 8a, and is formed in the cylinder wall. A hydraulic circuit 13 for opening and closing the mold is connected to the front chamber 10 of the mold opening cylinder 8 and the oil passages 11 and 12 of the rapid-feed piston 9.
【００１３】１４は型締ラムで、上記前端部２の内周と
適合しかつその後方の内周壁との間には流通間隙１５を
形成する所要外径の型締ピストン１６と、その型締ピス
トン１６から上記型開シリンダ８に同径に延設された型
開閉ラム１７と一体に形成してあり、その同径の型開閉
ラム１７と上記型締ラム１４とにより上記型締ピストン
１６の前後面の面積は同一面積となっている。A clamping ram 14 is a clamping piston 16 having a required outer diameter, which is adapted to the inner periphery of the front end portion 2 and forms a flow gap 15 between the inner peripheral wall behind the clamping ram. The mold opening / closing ram 17 is formed integrally with the mold opening cylinder 8 from the piston 16 and has the same diameter. The mold opening / closing ram 17 having the same diameter and the mold clamping ram 14 form the mold clamping piston 16. The front and rear surfaces have the same area.
【００１４】上記型開閉ラム１７の内部は、上記早送り
ピストン９の嵌挿により型閉シリンダ１８に形成され、
また型開閉ラム後端のピストン１９に仕切られた型開シ
リンダ８と上記型閉シリンダ１８の断面積Ｄ1 ，Ｄ2 は
略同一に形成してある。The inside of the mold opening / closing ram 17 is formed in a mold closing cylinder 18 by fitting the fast-forward piston 9 therein.
The sectional areas D 1 and D 2 of the mold opening cylinder 8 and the mold closing cylinder 18 partitioned by the piston 19 at the rear end of the mold opening / closing ram are substantially the same.
【００１５】２０は可動盤で、型厚調整部材２１を介し
て上記型締ラム１４の先端に連結してある。２２は固定
盤、２３は金型、２４はタイバー、２５は機台を示す。A movable plate 20 is connected to a tip of the mold clamping ram 14 via a mold thickness adjusting member 21. Reference numeral 22 denotes a fixed plate, 23 denotes a mold, 24 denotes a tie bar, and 25 denotes a machine base.
【００１６】図３に示す実施例は、型開閉ピストン２６
と一体の型開閉ロッド２７を両端部に貫設した型開閉シ
リンダ２８を、型締シリンダ１の側部に型締ラム１４と
並行にして取付け、その型開閉ロッド２７の一端を可動
盤２０に連結した場合であって、型開閉ピストン２６に
より仕切られた型開閉シリンダ２８の型開側の断面積Ｄ
1 と型閉側の断面積Ｄ2 は型開閉ロッド２７によって同
一に形成してある。The embodiment shown in FIG.
A mold opening / closing cylinder 28 having a mold opening / closing rod 27 integral with both ends is attached to the side of the mold clamping cylinder 1 in parallel with the mold clamping ram 14, and one end of the mold opening / closing rod 27 is attached to the movable platen 20. In this case, the sectional area D on the mold opening side of the mold opening / closing cylinder 28 partitioned by the mold opening / closing piston 26
1 and type cross-sectional area D 2 of the closed side is is formed on the same by the mold opening and closing rod 27.
【００１７】また型締ピストン１６の前後面の面積は、
型締ラム１４と、該型締ラム１４と同径に形成して型締
ピストン１６から後方に延設した軸部材２９により同一
に形成され、軸部材２９はカバー部材３０により被覆し
てある。The area of the front and rear surfaces of the mold clamping piston 16 is
The mold clamping ram 14 and the shaft member 29 formed to have the same diameter as the mold clamping ram 14 and extending rearward from the mold clamping piston 16 are formed identically, and the shaft member 29 is covered with a cover member 30.
【００１８】上記型締及び強力型開用の油圧回路７は、
油圧ポンプＰ１，Ｐ２を油圧源としてそれぞれ備えた高
圧型締回路と強力型開回路とからなる。高圧型締回路に
は切換バルブＳＯＬ５とそれぞれパイロット回路をもっ
て接続したメインバルブ４０とチェックバルブ４１とが
配設してあり、切換バルブＳＯＬ５をＢ側に切換える
と、メインバルブ４０がパイロット圧によりＢ側に切り
換わり、油圧ポンプＰ１からの圧油はチェックバルブ４
１を経て油通路５より型締シリンダ１に供給される。ま
た切換バルブＳＯＬ５がＡ側に切り換わると、メインバ
ルブ４０がＡ側に切り換わると同時に、チェックバルブ
４１がパイロット圧により開弁する。これにより型締シ
リンダ１の圧油はタンクに流出して、そこに圧抜きが生
ずる。The hydraulic circuit 7 for mold clamping and strong mold opening includes:
It is composed of a high-pressure mold clamping circuit and a strong mold open circuit each having the hydraulic pumps P 1 and P 2 as hydraulic pressure sources. The high-pressure mold clamping circuit is provided with a main valve 40 and a check valve 41 connected to a switching valve SOL5 with a pilot circuit, respectively. When the switching valve SOL5 is switched to the B side, the main valve 40 is moved to the B side by the pilot pressure. switched on, the pressure oil from the hydraulic pump P 1 is the check valve 4
The oil is supplied from the oil passage 5 to the mold clamping cylinder 1 through the cylinder 1. When the switching valve SOL5 is switched to the A side, the main valve 40 is switched to the A side, and at the same time, the check valve 41 is opened by the pilot pressure. As a result, the pressure oil of the mold clamping cylinder 1 flows out to the tank, where pressure is released.
【００１９】強力型開回路には、切換バルブSOL3と安全
用のリリーフバルブ４３が配設してある。また型締シリ
ンダ１と切換バルブSOL3との間の回路中に、上記ポンプ
Ｐ1の回路圧により閉弁状態を維持するロジックバルブ
４４を介してプレッシャスイッチ４８が接続してあり、
そのロジックバルブ４４とポンプＰ1 の回路とを接続す
るパイロット回路には、チェッキバルブ４５と切換バル
ブSOL4とが配設してある。The strong open circuit is provided with a switching valve SOL3 and a safety relief valve 43. Also in the circuit between the clamping cylinder 1 and the switching valve SOL3, Yes and pressure switch 48 via the logic valve 44 to maintain the closed state by the circuit pressure of the pump P 1 is connected,
The pilot circuit for connecting the circuit of the logic valve 44 and the pump P 1, and the check valve 45 and the switching valve SOL4 are are arranged.
【００２０】このような強力型開回路では、上記切換バ
ルブSOL4をＢ側に切り換えてロジックバルブ４４を開弁
すると、該ロジックバルブ４４を経て型締シリンダ１の
両方の油通路５，６が連通し、型締シリンダ１の圧油の
バイパスを形成する。このバイパスにより上記型締ピス
トン１６と上記内周との嵌合で流通間隙１５からの流出
が断たれ前端部２の圧油は、油通路５よりシリンダ後室
３に押出され、またその際の油圧抵抗により型閉速度が
スローダウンする。In such a strong type open circuit, when the switching valve SOL4 is switched to the B side to open the logic valve 44, both oil passages 5 and 6 of the mold clamping cylinder 1 communicate with each other via the logic valve 44. Then, a bypass of the pressure oil of the mold clamping cylinder 1 is formed. Due to this bypass, the outflow from the flow gap 15 is cut off by fitting of the mold clamping piston 16 and the inner circumference, and the pressure oil at the front end 2 is pushed out from the oil passage 5 to the cylinder rear chamber 3. The mold closing speed slows down due to hydraulic resistance.
【００２１】スローダウン後に切換バルブSOL4をＡ側に
戻してロジックバルブ４４を閉じ、切換バルブSOL3をＡ
側に切換えると、型締シリンダ１の前端部２はタンクと
接続する。かかる状態で上記高圧型締回路の切換バルブ
SOL5をＢ側に切換えると、上述のように油圧ポンプＰ1
からの圧油がシリンダ後室３に供給されて強力型締が行
われることになる。After the slowdown, the switching valve SOL4 is returned to the A side, the logic valve 44 is closed, and the switching valve SOL3 is
When switching to the side, the front end 2 of the mold clamping cylinder 1 is connected to the tank. In such a state, the switching valve of the high-pressure mold clamping circuit
When SOL5 is switched to the B side, as described above, the hydraulic pump P 1
Is supplied to the cylinder rear chamber 3 to perform strong mold clamping.
【００２２】成形完了後に上記シリンダ後室３の圧抜き
を行い、切換バルブSOL3をＢ側に切り換えると、上記前
端部に圧油が供給されて強力型開が行われる。この強力
型開には型締力の１／１０〜１／１５の力を要すること
もあるが、低圧ロードとすることより型締力の１／１０
〜１／１５の強力型開力を発生することができる。しか
るのち行程は上記型開閉用の油圧回路１３による高速型
開に移行する。When the cylinder rear chamber 3 is depressurized after the molding is completed, and the switching valve SOL3 is switched to the B side, the pressurized oil is supplied to the front end to open the powerful mold. This strong mold opening may require a force of 1/10 to 1/15 of the mold clamping force.
A strong opening force of １／1/15 can be generated. Thereafter, the process shifts to high-speed mold opening by the hydraulic circuit 13 for opening and closing the mold.
【００２３】油圧回路１３は、アキュムレータACC を油
圧源として備え、開閉切換用バルブとして回路圧により
作動するサーボバルブ４６が回路中に配設してある。こ
のサーボバルブ４６とアキュムレータACC との間の回路
には、回路圧により閉弁状態を維持するロジックバルブ
４７と、型取付け時の開閉を低速で行うための小流量切
換バルブSOL2とが並列に配設され、さらにロジックバル
ブ４７とロジックバルブ４７のパイロット流量切換用と
しての切換バルブSOL2との間に切換バルブSOL1が設けて
ある。The hydraulic circuit 13 includes an accumulator ACC as a hydraulic pressure source, and a servo valve 46 that operates as a switching valve by circuit pressure is provided in the circuit. In the circuit between the servo valve 46 and the accumulator ACC, a logic valve 47 for maintaining the closed state by the circuit pressure and a small flow rate switching valve SOL2 for opening and closing the mold at low speed are mounted in parallel. A switching valve SOL1 is provided between the logic valve 47 and a switching valve SOL2 for switching the pilot flow rate of the logic valve 47.
【００２４】このような油圧回路１３では、高速型開閉
時に切換バルブSOL1が働いてロジックバルブ４７を開
き、サーボバルブ４６へ圧油を供給して型開閉を行う。
上記型閉シリンダ１８に供給された圧油により型締ラム
１４は、型締ピストン１６及び同軸の型開閉ラム１７と
ともに型閉方向に前進移動し、また型開シリンダ８の前
室１０に供給された圧油によって型開方向に後退移動す
る。In such a hydraulic circuit 13, the switching valve SOL1 operates to open the logic valve 47 at the time of high-speed mold opening and closing, and pressurized oil is supplied to the servo valve 46 to perform mold opening and closing.
The pressurized oil supplied to the mold closing cylinder 18 causes the mold clamping ram 14 to move forward in the mold closing direction together with the mold closing piston 16 and the coaxial mold opening and closing ram 17, and is supplied to the front chamber 10 of the mold opening cylinder 8. The pressure oil moves backward in the mold opening direction.
【００２５】この際、型締ピストン１６の周囲には所要
（２０mm前後）の流通間隙１５が形成されているので、
内周の径を小径に形成した前端部２以外では、移動方向
の圧油は型締ピストン周囲から反対側に押出され、また
型締ピストン１６の前後面の面積が同一なので、該型締
ピストン１６により仕切られたシリンダ前後の油室の圧
油にも過不足が生じない。この結果、移動中の型締ピス
トン１６に対する油圧抵抗や負圧等がなくなり、型開閉
は高速で行われることになる。また型開シリンダ８と上
記型閉シリンダ１８の断面積Ｄ1 ，Ｄ2 を略同一に形成
しているので、サーボバルブ４６によるクローズド制御
が可能となり、円滑に高速度に立上げ型閉直前に円滑に
減速するなど高速度高応答性が得られる。At this time, a required (about 20 mm) flow gap 15 is formed around the mold clamping piston 16.
Except for the front end portion 2 having a small inner diameter, the pressurized oil in the moving direction is pushed out from the periphery of the mold clamping piston to the opposite side, and the area of the front and rear surfaces of the mold clamping piston 16 is the same. There is no excess or deficiency in the pressure oil in the oil chambers before and after the cylinder partitioned by 16. As a result, there is no hydraulic resistance or negative pressure on the moving mold clamping piston 16, and the mold is opened and closed at a high speed. Further, since the cross-sectional areas D 1 and D 2 of the mold opening cylinder 8 and the mold closing cylinder 18 are substantially the same, closed control by the servo valve 46 becomes possible, and the mold is smoothly raised to a high speed and immediately before the mold is closed. High speed and high response such as smooth deceleration can be obtained.
【００２６】図４は各油圧回路中のバルブ作動説明図
で、各行程における作動状態を帯線で示すものである。FIG. 4 is a view for explaining the valve operation in each hydraulic circuit, and the operating state in each stroke is indicated by a band line.
【００２７】[0027]
【発明の効果】この発明は上述のように、前端部内周の
径を他の部分より小径に形成した型締シリンダ内の型締
ピストンを、上記前端部内周と適合しかつ他の部分の内
周壁との間には流通間隙を形成する所要外径に形成する
とともに、型締ピストンの前後面の面積及び型開閉シリ
ンダの断面積を略同一に形成したので、サーボバルブに
よるメータイン、メータアウトの制御がスムーズに行わ
れ、しかも型締シリンダ内の摺動抵抗及び油圧抵抗の低
減と相俟って、クローズド制御により型開閉を高速度高
応答加減速で円滑動作することができ、油圧デジタルサ
ーボ油圧電子システムを応用適用して高速度、高応答、
高精度位置制御を行う。トグル並みの加減速制御が可能
となる。As described above, according to the present invention, the clamping piston in the clamping cylinder having the inner periphery of the front end portion formed to have a smaller diameter than the other portions is adapted to the inner periphery of the front end portion and to the inside of the other portions. The required outer diameter to form a flow gap between the peripheral wall and the peripheral wall, the area of the front and rear surfaces of the mold clamping piston and the cross-sectional area of the mold opening and closing cylinder are formed to be substantially the same. Control is performed smoothly, and coupled with the reduction of sliding resistance and hydraulic resistance in the mold clamping cylinder, closed control enables smooth opening / closing of the mold with high speed and high response acceleration / deceleration. High speed, high response,
Performs high-precision position control. Acceleration / deceleration control comparable to that of a toggle is possible.
【００２８】また型締ピストンの移動に伴う圧油の流動
を型締ピストン周囲の流通間隙により行い、前端部での
み型締ピストンをシールして型締を行えるので型締シリ
ンダの構成として、高速型開閉動作時の型締シリンダ内
の油の移動の簡略化と、摺動抵抗の極小化による高速型
開閉特性及び加減速特性の向上を図ることができ、さら
には高速型閉からスローダウン、型締のための昇圧、圧
抜き、強力型開から高速型開閉などの各行程の切り換え
移行が簡便で円滑に行え、強力型開力が比較的簡単でか
つ大出力が得られる等の特長を有する。Further, the flow of the pressure oil accompanying the movement of the mold-clamping piston is performed through the flow gap around the mold-clamping piston, and the mold-clamping piston can be sealed only at the front end to perform mold-clamping. It is possible to simplify the movement of oil in the mold clamping cylinder at the time of mold opening and closing operation, and to improve the high speed mold opening and closing characteristics and acceleration / deceleration characteristics by minimizing the sliding resistance. Switching between each process, such as pressurization and depressurization for mold clamping, opening and closing of the high-speed mold to high-speed mold opening and closing, can be performed easily and smoothly, and the strong mold opening force is relatively simple and a large output can be obtained. Have.
【図１】 この発明に係る成形機の型締装置の第１実施
例の要部縦断側面図である。FIG. 1 is a vertical sectional side view of a main part of a first embodiment of a mold clamping device of a molding machine according to the present invention.
【図２】 同上の油圧回路図である。FIG. 2 is a hydraulic circuit diagram of the same.
【図３】 第２実施例の要部縦断面図である。FIG. 3 is a longitudinal sectional view of a main part of a second embodiment.
【図４】 油圧回路中のバルブ作動状態説明図である。FIG. 4 is an explanatory diagram of a valve operating state in a hydraulic circuit.
１ 型締シリンダ ２ 型締シリンダの前端部 ３ シリンダ後室 ５ 油通路 ６ 油通路 ７ 型締及び強力型開用の油圧回路 ８ 型開シリンダ ９ 早送りピストン １１ 油通路 １２ 油通路 １３ 型開閉用の油圧回路 １４ 型締ラム １５ 流通間隙 １６ 型締ピストン １７ 型開閉ラム １８ 型閉シリンダ ４６ サーボバルブ DESCRIPTION OF SYMBOLS 1 Mold clamping cylinder 2 Front end of mold clamping cylinder 3 Cylinder rear chamber 5 Oil passage 6 Oil passage 7 Hydraulic circuit for mold clamping and strong mold opening 8 Mold opening cylinder 9 Rapid feed piston 11 Oil passage 12 Oil passage 13 For opening and closing mold Hydraulic circuit 14 Mold clamping ram 15 Flow gap 16 Mold clamping piston 17 Mold opening and closing ram 18 Mold closing cylinder 46 Servo valve
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭63−128925（ＪＰ，Ａ) 特開 昭55−9885（ＪＰ，Ａ) 特開 昭48−42058（ＪＰ，Ａ) (58)調査した分野(Int.Cl.6，ＤＢ名) B29C 45/64 - 45/68 B29C 33/20 - 33/24 B22D 17/26──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-63-128925 (JP, A) JP-A-55-9885 (JP, A) JP-A-48-42058 (JP, A) (58) Field (Int.Cl. 6 , DB name) B29C 45/64-45/68 B29C 33/20-33/24 B22D 17/26
Claims (2)
た型締シリンダと、該型締シリンダの後端部に連設した
型開シリンダと、上記前端部内周と適合しかつ他の部分
の内周壁との間には流通間隙を形成する所要外径の型締
ピストンと一体の型締ラムと、その型締ラムと同径で型
締ピストンから上記型開シリンダに延設され、内部が早
送りピストンを備える型閉シリンダに形成された型開閉
ラムとからなり、上記型締ピストンの前後面の面積を同
径の上記型締ラムと型開閉ラムとにより同一面積に形成
するとともに、上記型開シリンダと型閉シリンダの断面
積を略同一に形成してなることを特徴とする成形機の型
締装置。1. A mold clamping cylinder having an inner periphery of a front end portion smaller in diameter than other portions, a mold opening cylinder connected to a rear end portion of the mold clamping cylinder, and another portion adapted to the inner periphery of the front end portion. A mold clamping ram integral with a mold clamping piston having a required outer diameter forming a flow gap between the inner peripheral wall of the mold and a mold clamping ram having the same diameter as the mold clamping ram, extending from the mold clamping piston to the mold opening cylinder, and And a mold opening / closing ram formed in a mold closing cylinder provided with a fast-forward piston, and the front and rear surfaces of the mold clamping piston are formed in the same area by the mold clamping ram and the mold opening / closing ram having the same diameter. A mold clamping device for a molding machine, wherein a sectional area of a mold opening cylinder and a sectional area of a mold closing cylinder are substantially the same.
た型締シリンダと、上記前端部内周と適合しかつ他の部
分の内周壁との間には流通間隙を形成する所要外径の型
締ピストンと一体の型締ラムと、その型締ラムと同径で
型締ピストンから型締シリンダの外部に延設された軸部
材と、型締シリンダと可動盤とにわたり設けた開閉シリ
ンダ及び該開閉シリンダに貫設した開閉ロッドと一体の
開閉ピストンとからなり、上記型締ピストンの前後面の
面積を同径の上記型締ラムと軸部材とにより同一面積に
形成するとともに、上記型開閉ピストンの前後面の面積
を開閉ピストン前後の開閉ロッドの外径を同じくして略
同一に形成してなることを特徴とする成形機の型締装
置。2. A cylinder having a required outer diameter with a flow gap formed between a mold clamping cylinder having an inner periphery of the front end portion smaller in diameter than the other portion and an inner peripheral wall of the other portion which is compatible with the inner periphery of the front end portion. A mold clamping ram integral with the mold clamping piston, a shaft member having the same diameter as the mold clamping ram and extending from the mold clamping piston to the outside of the mold clamping cylinder, an opening / closing cylinder provided over the mold clamping cylinder and the movable platen, An opening / closing rod penetrating the opening / closing cylinder and an integral opening / closing piston, wherein the front and rear surfaces of the mold clamping piston are formed in the same area by the clamping ram and the shaft member having the same diameter, and A mold clamping device for a molding machine, characterized in that the front and rear surfaces of the piston are formed so that the opening and closing rods before and after the opening and closing piston have the same outer diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26104694A JP2808246B2 (en) | 1994-09-30 | 1994-09-30 | Mold clamping device of molding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26104694A JP2808246B2 (en) | 1994-09-30 | 1994-09-30 | Mold clamping device of molding machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0899338A JPH0899338A (en) | 1996-04-16 |
| JP2808246B2 true JP2808246B2 (en) | 1998-10-08 |
Family
ID=17356312
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26104694A Expired - Fee Related JP2808246B2 (en) | 1994-09-30 | 1994-09-30 | Mold clamping device of molding machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2808246B2 (en) |
-
1994
- 1994-09-30 JP JP26104694A patent/JP2808246B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0899338A (en) | 1996-04-16 |
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