JPH01221208A - Mold-clamping device - Google Patents
Mold-clamping deviceInfo
- Publication number
- JPH01221208A JPH01221208A JP63049058A JP4905888A JPH01221208A JP H01221208 A JPH01221208 A JP H01221208A JP 63049058 A JP63049058 A JP 63049058A JP 4905888 A JP4905888 A JP 4905888A JP H01221208 A JPH01221208 A JP H01221208A
- Authority
- JP
- Japan
- Prior art keywords
- mold
- pressure
- valve
- movable
- movable mold
- 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
Links
- 230000001603 reducing effect Effects 0.000 claims abstract description 21
- 239000012530 fluid Substances 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 9
- 238000013459 approach Methods 0.000 abstract description 2
- 238000002347 injection Methods 0.000 description 16
- 239000007924 injection Substances 0.000 description 16
- 238000001746 injection moulding Methods 0.000 description 6
- 238000007664 blowing Methods 0.000 description 5
- 238000002474 experimental method Methods 0.000 description 5
- 229920005989 resin Polymers 0.000 description 5
- 239000011347 resin Substances 0.000 description 5
- 238000003825 pressing Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/64—Mould opening, closing or clamping devices
- B29C45/67—Mould opening, closing or clamping devices hydraulic
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Fluid-Pressure Circuits (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
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の金型保護をはかる型締め装置にか
かり、特にその型閉じ工程において可動型が固定型にタ
ッチする直前に円滑なる減速を行わせ金型保護を図るも
のに関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a mold clamping device for protecting a mold of an injection molding machine, and in particular, to a mold clamping device that protects a mold of an injection molding machine, and in particular, a mold clamping device that protects a mold of an injection molding machine. This relates to devices that protect molds by slowing down the speed.
従来射出成形機において、量産性向上のために、その型
閉じ工程において可動型に早送りをかけるものが存在し
た。この早送りを行う手段として油圧シリンダによるも
のは、型締め用シリンダのピストン側流体圧の流体がピ
ストン側に戻る早送り用の差動回路を設けて型閉じを急
速に行うことが知られていた。この場合、可動型が固定
型に接触する前にその差動回路を切断して可動型の移動
速度を小とすると共に、次いで絞り弁回路に切り換え、
さらに可動型の移動速度を低下させ、可動型が固定型に
激突することを防止していた。Conventional injection molding machines have had machines that rapidly feed the movable mold during the mold closing process in order to improve mass production. It has been known that a hydraulic cylinder is used as a means for performing this rapid feeding, and that a differential circuit is provided for rapid feeding in which fluid under fluid pressure on the piston side of the mold clamping cylinder returns to the piston side to rapidly close the mold. In this case, before the movable mold contacts the fixed mold, the differential circuit is cut to reduce the moving speed of the movable mold, and then the throttle valve circuit is switched to
Furthermore, the moving speed of the movable mold was reduced to prevent the movable mold from colliding with the fixed mold.
ところが実験によれば、早送りのための差動油圧回路を
切断し、絞り弁回路により可動型の速度を減速させるた
めには、差動回路切断位置を可動型と固定型との距離が
比較的大きい状態で行行わなければならず、その距離を
小さく取りすぎると、可動型の減速を充分に行えないま
ま固定型にそれが激突する欠点があった。しかも早送り
用差動弁を解除し、絞り弁回路切り換え時に油撃が生じ
、それが可動型の速度を瞬間的に増速させる原因にもな
っていた。However, according to experiments, in order to disconnect the differential hydraulic circuit for rapid traverse and reduce the speed of the movable type using the throttle valve circuit, the differential circuit disconnection position must be set at a position where the distance between the movable type and the fixed type is relatively large. It had to be carried out in a large state, and if the distance was too small, there was a drawback that the movable mold would collide with the fixed mold without being able to sufficiently decelerate. Moreover, when the rapid-forward differential valve was released and the throttle valve circuit was switched, an unexpected shock occurred, which caused the speed of the movable type to increase instantaneously.
そこで本発明者は各種実験の結果、可動型を極めて円滑
に減速することができる回路を案出した。その構成は次
のとおりである。Therefore, as a result of various experiments, the present inventor devised a circuit that can extremely smoothly decelerate the movable type. Its composition is as follows.
即ち、流体圧で作動する型締めシリンダｌにより可動金
型２を固定金型３に接離自在に駆動させるものにおいて
、可動金型２が固定金型３側に移動する型閉じ工程のと
き、型締めシリンダ１内のピストンロフト４側の流体が
ピストン側に戻る早送り用差動回路５を設ける。そして
その型閉じ工程中に可動金型２が固定金型３に近接した
位置で、差動回路５を作用させたまま、可動金型２の移
動速度を急速に減速させるように、ピストン側流体圧を
型閉じ開始時に比べて著しく減圧させるための低圧用減
圧弁６を型締めシリンダ１と圧力源との間に介装したこ
とを特徴とする。That is, in a device in which a movable mold 2 is driven toward and away from a fixed mold 3 by a mold clamping cylinder 1 operated by fluid pressure, during a mold closing process in which the movable mold 2 moves toward the fixed mold 3, A fast-feeding differential circuit 5 is provided in which fluid on the piston loft 4 side in the mold clamping cylinder 1 returns to the piston side. During the mold closing process, at a position where the movable mold 2 is close to the fixed mold 3, the piston-side fluid is applied so as to rapidly reduce the moving speed of the movable mold 2 while keeping the differential circuit 5 in operation. The present invention is characterized in that a low-pressure reducing valve 6 is interposed between the mold clamping cylinder 1 and the pressure source to significantly reduce the pressure compared to when mold closing starts.
可動金型２の型閉じ工程中において、該可動金型２が圧
力切換用リミットスイッチ２０に接触すると圧力切換弁
１０が作動し、第１図に示す如く回路が形成される。す
ると低圧用減圧弁６が作用し、型締めシリンダ１のピス
トン側油圧が急激に減少する。しかもこのとき、差動弁
８自体が作用しているため可動金型２に加わる油圧力は
さらに半分以下に小さくなる。すると、可動金型２の駆
動力が著しく減少し、可動金型２の進行速度が急激に低
下してそれが固定金型３に緩衝的に接触する。実験によ
れば可動金型２と固定金型３との距離を１■程の位置で
圧力切換用リミットスイッチ２０を作用させた場合にお
いて、圧力切換用リミントスインチ２０の減速が極めて
円滑に行われた。しかもピストン２１に油翳が加わるこ
とがなかった。During the mold closing process of the movable mold 2, when the movable mold 2 contacts the pressure switching limit switch 20, the pressure switching valve 10 is activated and a circuit is formed as shown in FIG. Then, the low pressure reducing valve 6 is activated, and the piston side hydraulic pressure of the mold clamping cylinder 1 is rapidly reduced. Moreover, at this time, since the differential valve 8 itself is acting, the hydraulic pressure applied to the movable mold 2 is further reduced to less than half. Then, the driving force of the movable mold 2 is significantly reduced, the advancing speed of the movable mold 2 is rapidly reduced, and the movable mold 2 comes into contact with the fixed mold 3 in a cushioning manner. According to experiments, when the pressure switching limit switch 20 is activated at a position where the distance between the movable mold 2 and the fixed mold 3 is about 1 inch, the pressure switching limit switch 20 decelerates extremely smoothly. I was disappointed. Furthermore, no oil cloud was added to the piston 21.
次に図面に基づいて本発明の実施例につき説明する。 Next, embodiments of the present invention will be described based on the drawings.
第１図は射出成形機に利用した本装置の油圧回路図を示
し、型締めシリンダ１により可動金型２の移動を行う。FIG. 1 shows a hydraulic circuit diagram of this device used in an injection molding machine, in which a movable mold 2 is moved by a mold clamping cylinder 1.
そ掻と共に、射出シリンダ１９の駆動に基づいて金型内
に合成樹脂を射出するものである。可動金型２は型締め
シリンダ１により駆動され、該型締めシリンダ１は圧力
源７の油圧が低圧用減圧弁６．金型開閉弁９を介して供
給される。それと共に、該型締めシリンダｌのピストン
側とシリンダ側との間に差動弁８が並列される。また、
低圧用減圧弁６は圧力切換弁１０の右動により減圧作用
し、その圧力切換弁１０は可動金型２が固定金型３に近
接したとき働く圧力切換用リミットスイッチ２０に連動
する。さらにこの圧力切換弁１０は射出シリンダ１９側
の保圧用減圧弁１１をも制御するように構成されている
。なお、この射出シリンダ１９は射出用弁２２及び絞り
１３により出入自在に制御され、該射出シリンダ１９の
ピストンロッドが射出筒に連結されている。また、固定
金型３の端面にはエア吹き出しノズル１４が穿設され、
該エア吹き出しノズル１４にエア源１８がエアレギュレ
ータ１７゜開度調整ニードル１６．エア圧力スイッチ１
５を介して連結されている。Along with scraping, the synthetic resin is injected into the mold based on the drive of the injection cylinder 19. The movable mold 2 is driven by a mold clamping cylinder 1, and the mold clamping cylinder 1 is operated by a low pressure reducing valve 6. It is supplied via the mold opening/closing valve 9. At the same time, a differential valve 8 is arranged in parallel between the piston side and the cylinder side of the mold clamping cylinder l. Also,
The low pressure reducing valve 6 acts to reduce the pressure by moving the pressure switching valve 10 to the right, and the pressure switching valve 10 is interlocked with a pressure switching limit switch 20 that operates when the movable mold 2 approaches the fixed mold 3. Further, this pressure switching valve 10 is configured to also control a pressure reducing valve 11 for maintaining pressure on the injection cylinder 19 side. The injection cylinder 19 is controlled to move in and out by an injection valve 22 and a throttle 13, and a piston rod of the injection cylinder 19 is connected to an injection cylinder. In addition, an air blowing nozzle 14 is bored in the end surface of the fixed mold 3.
An air source 18 is connected to the air blowing nozzle 14 through an air regulator 17 and an opening adjusting needle 16. Air pressure switch 1
They are connected via 5.
このようにしてなる本装置は、次の如く動作する。先ず
、第１図において可動金型２が待機位置にあるときには
、圧力切換用リミットスイッチ２０がＯＦＦ状態であり
、圧力切換弁ｌＯが中央位置にある。そして可動金型２
の型閉じを開始する場合には、金型開閉弁９が第１図の
状態に位置される。即ち圧力源７からの油圧が型締めシ
リンダ１のピストン２１側に流入する。このとき差動弁
８は図の位置にあり、それにより差動回路５が働く。そ
して、型締めシリンダ１のピストンロッド４側から流出
したオイルが型締めシリンダ１のピストン２１側に戻さ
れ、可動金型２は早送り移動する。そして可動金型２が
急速に圧力切換用リミットスイッチ２０に達するとその
スイッチをＯＮ状態とし、圧力切換弁１０を第１図及び
第２図の状態に保持させる。すると、低圧用減圧弁６に
より予め設定された圧力が型締めシリンダ１のピストン
２１側に加わる。この低圧用減圧弁６の設定圧力は圧力
源７の圧力に対して一例として２０分の１程に設定する
。すると、型締めシリンダ１のピストン２１側圧力が２
０分の１に減少し、差動回路５自体はそのまま働くため
、ピストンロフト４の断面積に低圧用減圧弁６の設定圧
力を掛は合わせた力が可動金型２に働く。この実験にお
いては型締めシリンダ１の型締め力が３トンであるもの
に対し、低圧用減圧弁６を作用させたときの押圧力は４
９ｋｇとなるように設定した。このときの低圧用減圧弁
６の設定圧力は７ｋｇ／ｃｄであり、圧力源７の油圧は
１３０ ｋｇ／ ｔｉで、型締めシリンダ１のピストン
２１及びピストンロフト４の夫々の直径は５５１ｍと３
０鶴である。そして圧力切換用リミットスイッチ２０の
働く位置は、可動金型２と固定金型３との間隙が約１Ｃ
１１程となる場所とした。すると可動金型２の速度は極
めて円滑に減速し固定金型３に極めて小さな音でタッチ
した。なお固定金型３にはエア吹き出しノズル１４が設
けられ、エア源１８からのエアが噴出している。仮に可
動金型２と固定金型３との間にランナーや樹脂の小片等
が噛み込んだときには、可動金型２の押圧力が極めて小
さいから可動金型２及び固定金型３間にわずかの隙間を
形成させる。すると、その背圧を検知して作動するエア
圧力スイッチ１５がＯＦＦ状態のままとなる。エア圧力
スイッチ１５が働くことによって差動弁８を加圧側に駆
動するように構成しているため、可動金型２は高圧型締
めを行うことがなく、金型破損防止が可能となる。この
実験では最小０．０１ｍ重迄０厚みの樹脂片が両金型２
，３間に挟持されても、それを確認することができた。The device thus constructed operates as follows. First, in FIG. 1, when the movable mold 2 is in the standby position, the pressure switching limit switch 20 is in the OFF state, and the pressure switching valve IO is in the center position. And movable mold 2
When starting mold closing, the mold opening/closing valve 9 is positioned as shown in FIG. That is, the hydraulic pressure from the pressure source 7 flows into the piston 21 side of the mold clamping cylinder 1. At this time, the differential valve 8 is in the position shown in the figure, so that the differential circuit 5 is activated. Then, the oil flowing out from the piston rod 4 side of the mold clamping cylinder 1 is returned to the piston 21 side of the mold clamping cylinder 1, and the movable mold 2 moves rapidly. When the movable mold 2 rapidly reaches the pressure switching limit switch 20, the switch is turned on to maintain the pressure switching valve 10 in the state shown in FIGS. 1 and 2. Then, a preset pressure is applied to the piston 21 side of the mold clamping cylinder 1 by the low pressure reducing valve 6. The set pressure of this low pressure reducing valve 6 is set to, for example, about one-twentieth of the pressure of the pressure source 7. Then, the pressure on the piston 21 side of the mold clamping cylinder 1 becomes 2
Since the differential circuit 5 itself continues to operate as it is, the combined force of the cross-sectional area of the piston loft 4 multiplied by the set pressure of the low pressure reducing valve 6 acts on the movable mold 2. In this experiment, the clamping force of the mold clamping cylinder 1 was 3 tons, but the pressing force when the low pressure reducing valve 6 was applied was 4 tons.
The weight was set to 9 kg. At this time, the set pressure of the low pressure reducing valve 6 is 7 kg/cd, the oil pressure of the pressure source 7 is 130 kg/ti, and the diameters of the piston 21 and piston loft 4 of the clamping cylinder 1 are 551 m and 3.
It is 0 cranes. The pressure switching limit switch 20 operates at a position where the gap between the movable mold 2 and the fixed mold 3 is approximately 1C.
The location was about 11. Then, the speed of the movable mold 2 decreased extremely smoothly and touched the fixed mold 3 with an extremely small sound. Note that the fixed mold 3 is provided with an air blowing nozzle 14, from which air is blown out from an air source 18. If a runner or a small piece of resin gets caught between the movable mold 2 and the fixed mold 3, the pressing force of the movable mold 2 is extremely small, so there will be a small amount of material between the movable mold 2 and the fixed mold 3. Form a gap. Then, the air pressure switch 15, which is activated by detecting the back pressure, remains in the OFF state. Since the differential valve 8 is configured to be driven to the pressure side by the operation of the air pressure switch 15, the movable mold 2 does not have to be clamped under high pressure, making it possible to prevent mold damage. In this experiment, a resin piece of 0 thickness up to a minimum weight of 0.01 m was placed in both molds.
, 3, it was possible to confirm this.
次に可動金型２と固定金型３との間に樹脂片等の噛み込
みが存在しないときには、エア圧力スイッチ１５が働く
。すると差動弁８が左動しそれが加圧側に位置すると共
に、圧力切換弁１０を中央位置に移動する。すると、可
動金型２に３トンの加圧力が加わり、次いで射出用弁２
２が右動して射出側に位置し、射出シリンダ１９のピス
トンロッドを駆動する。そして可動金型２と固定金型３
との間に溶融した樹脂を射出することができる。次に圧
力切換弁１０が左動し保圧側に位置すると、射出シリン
ダ１９のピストンロッドの押圧力が減少する。次いで、
金型開閉弁９が左動し型開き側に位置すると共に、射出
用弁２２がサックバック側に位置し、可動金型２及び射
出シリンダＩ９のピストンロッドが復帰する。Next, when there is no resin piece or the like caught between the movable mold 2 and the fixed mold 3, the air pressure switch 15 is activated. Then, the differential valve 8 moves to the left and is located on the pressurizing side, and the pressure switching valve 10 is moved to the center position. Then, a pressurizing force of 3 tons is applied to the movable mold 2, and then the injection valve 2
2 moves to the right and is located on the injection side, driving the piston rod of the injection cylinder 19. And movable mold 2 and fixed mold 3
The molten resin can be injected between the two. Next, when the pressure switching valve 10 moves to the left and is located on the pressure holding side, the pressing force of the piston rod of the injection cylinder 19 decreases. Then,
The mold opening/closing valve 9 moves to the left and is located on the mold opening side, and the injection valve 22 is located on the suckback side, so that the movable mold 2 and the piston rod of the injection cylinder I9 return.
以上のように本発明では、型閉じの際、可動金型２が金
型タッチする直前においても差動回路５を働かせると共
に、低圧用減圧弁６のドレン制御を行うことにより圧力
切り換え応答速度を極めて速くし、型締めを円滑に高速
から低速低圧の切り換えにし、ハイサイクルの射出成形
機の型締めが可能となった。また、一つの圧力切換弁１
０により射出回路の保圧用減圧弁１１のドレン制御を行
うと共に、低圧用減圧弁６のドレン制御も行うこととし
た。それにより一個の圧力切換弁１０で２回路の圧力制
御を行い制御回路の簡素化をはかっている。さらには、
固定金型３にエア吹き出しノズル１４が設けられエアの
配圧をエア圧力スイッチェ５で検出することにより最小
０．０１ｍｍ迄の厚みの樹脂片の噛み込みをも確認する
ことができた。これは勿論前記した如く可動金型２の金
型タッチ圧力を差動回路５の作用により極端に小さくす
ると共に、低圧切換時に油窄を発生させない構造を採用
した結果でもある。As described above, in the present invention, when closing the mold, the differential circuit 5 is operated even immediately before the movable mold 2 touches the mold, and the pressure switching response speed is increased by controlling the drain of the low pressure reducing valve 6. This makes it possible to smoothly switch mold clamping from high speed to low speed and low pressure, making mold clamping possible for high-cycle injection molding machines. In addition, one pressure switching valve 1
0 to control the drain of the pressure reducing valve 11 for maintaining pressure in the injection circuit, and also to control the drain of the pressure reducing valve 6 for low pressure. As a result, one pressure switching valve 10 performs pressure control in two circuits, thereby simplifying the control circuit. Furthermore,
An air blowing nozzle 14 was provided on the fixed mold 3, and by detecting the air pressure distribution with an air pressure switcher 5, it was possible to confirm that resin pieces with a minimum thickness of 0.01 mm were caught. This is, of course, a result of the mold touch pressure of the movable mold 2 being extremely reduced by the action of the differential circuit 5 as described above, and also of adopting a structure that does not cause oil blockage when switching to a low pressure.
本発明の型締め装置は以上のような構成からなり、次の
効果を有する。The mold clamping device of the present invention has the above configuration and has the following effects.
本装置は可動金型２が固定金型３側に移動する型閉じ工
程のとき、差動回路５により早送りを行う。それと共に
、その工程中可動金型２が固定金型３直前に近接した位
置でも、その差動回路５を作動させたまま、低圧用減圧
弁６によりピストン側流体圧を著しく減圧させるように
構成した。そのため、可動金型２の移動速度を短い距離
で急激に減速させ、それにより可動金型２が固定金型３
に激突することを防止し、金型保護を図り得る。それと
共に差動回路５の作用により、金型タッチの押圧力を著
しく小さくできる。In this device, during the mold closing process in which the movable mold 2 moves toward the fixed mold 3, the differential circuit 5 performs rapid forwarding. At the same time, even if the movable mold 2 is in a position immediately in front of the fixed mold 3 during the process, the fluid pressure on the piston side is significantly reduced by the low pressure reducing valve 6 while the differential circuit 5 is kept operating. did. Therefore, the moving speed of the movable mold 2 is suddenly decelerated over a short distance, so that the movable mold 2 moves to the fixed mold 3.
This prevents the mold from colliding with the mold and protects the mold. At the same time, due to the action of the differential circuit 5, the pressing force when touching the mold can be significantly reduced.
第１図は本発明の金型の型締め装置の一例を示す回路図
、第２図はその低圧用減圧弁６の一例を示す説明図。
１・・・型締めシリンダ ２・・・可動金型３・・・固
定金型 ４・・・ピストンロッド５・・・差動回
路 ６・・・低圧用減圧弁７・・・圧力源
８・・・差動弁９・・・金型開閉弁 １０・・
・圧力切換弁１１・・・保圧用減圧弁 １２・・・射
出弁１３・・・絞り １４・・・エア吹き出
しノズル１５・・・エア圧力スイッチ
１６・・・開度調整ニードル
１７・・・エアレギュレータ
１８・・・エア源 １９・・・射出シリンダ２
０・・・圧力切換用リミットスイッチ２１・・・ピスト
ン ２２・・・射出用弁代理人 弁理士 窪 １
）卓 美FIG. 1 is a circuit diagram showing an example of a mold clamping device for a mold according to the present invention, and FIG. 2 is an explanatory diagram showing an example of a low pressure reducing valve 6 thereof. 1... Mold clamping cylinder 2... Movable mold 3... Fixed mold 4... Piston rod 5... Differential circuit 6... Low pressure reducing valve 7... Pressure source
8...Differential valve 9...Mold opening/closing valve 10...
・Pressure switching valve 11...pressure-reducing valve for holding pressure 12...injection valve 13...throttle 14...air blowing nozzle 15...air pressure switch 16...opening adjustment needle 17...air Regulator 18...Air source 19...Injection cylinder 2
0...Limit switch for pressure switching 21...Piston 22...Injection valve agent Patent attorney Kubo 1
) Takumi
Claims (1)
（２）を固定金型（３）に接離自在に駆動させる金型の
型締め装置において、前記可動金型（２）が固定金型（
３）側に移動する型閉じ工程のとき、前記型締めシリン
ダ（１）内のピストンロッド（４）側の流体がピストン
側に戻る早送り用差動回路（５）を設け、前記型閉工程
中に前記可動金型（２）が固定金型（３）に近接した位
置で前記差動回路（５）を作用させたまま、前記可動金
型（２）の移動速度を急速に減速させるために、前記ピ
ストン側流体圧を前記型閉じ開始時に比べて著しく減圧
させる低圧用減圧弁（６）を該シリンダ（１）と流体圧
力源（７）との間に介装したことを特徴とする金型の型
締め装置。In a mold clamping device for driving a movable mold (2) toward and away from a fixed mold (3) by a mold clamping cylinder (1) operated by fluid pressure, the movable mold (2) is connected to a fixed mold (3). Type (
3) A fast-feeding differential circuit (5) is provided in which the fluid on the piston rod (4) side in the mold clamping cylinder (1) returns to the piston side during the mold closing process. In order to rapidly reduce the moving speed of the movable mold (2) while the differential circuit (5) is operating at a position where the movable mold (2) is close to the fixed mold (3). , a low-pressure reducing valve (6) is interposed between the cylinder (1) and the fluid pressure source (7) to significantly reduce the fluid pressure on the piston side compared to when the mold starts closing. Mold clamping device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63049058A JPH01221208A (en) | 1988-03-01 | 1988-03-01 | Mold-clamping device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63049058A JPH01221208A (en) | 1988-03-01 | 1988-03-01 | Mold-clamping device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01221208A true JPH01221208A (en) | 1989-09-04 |
Family
ID=12820484
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63049058A Pending JPH01221208A (en) | 1988-03-01 | 1988-03-01 | Mold-clamping device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01221208A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0484655A (en) * | 1990-07-27 | 1992-03-17 | Nissei Plastics Ind Co | Die clamping device in forming machine |
| US5325908A (en) * | 1992-01-17 | 1994-07-05 | Toyota Jidosha Kabushiki Kaisha | Hydraulically operated casting machine for producing a formed product, having mold closing and clamping cylinders |
| JP2006132699A (en) * | 2004-11-08 | 2006-05-25 | Kayaba Ind Co Ltd | Valve device |
| CN110081029A (en) * | 2019-03-15 | 2019-08-02 | 南京航空航天大学 | A kind of hydraulic device and control method of Part-oriented Deformation control |
| CN114536653A (en) * | 2020-11-24 | 2022-05-27 | 克斯美库股份有限公司 | Clamping system |
| WO2022172636A1 (en) * | 2021-02-12 | 2022-08-18 | 川崎重工業株式会社 | Hydraulic shovel drive system |
-
1988
- 1988-03-01 JP JP63049058A patent/JPH01221208A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0484655A (en) * | 1990-07-27 | 1992-03-17 | Nissei Plastics Ind Co | Die clamping device in forming machine |
| US5325908A (en) * | 1992-01-17 | 1994-07-05 | Toyota Jidosha Kabushiki Kaisha | Hydraulically operated casting machine for producing a formed product, having mold closing and clamping cylinders |
| JP2006132699A (en) * | 2004-11-08 | 2006-05-25 | Kayaba Ind Co Ltd | Valve device |
| JP4558451B2 (en) * | 2004-11-08 | 2010-10-06 | カヤバ工業株式会社 | Valve device |
| CN110081029A (en) * | 2019-03-15 | 2019-08-02 | 南京航空航天大学 | A kind of hydraulic device and control method of Part-oriented Deformation control |
| CN114536653A (en) * | 2020-11-24 | 2022-05-27 | 克斯美库股份有限公司 | Clamping system |
| CN114536653B (en) * | 2020-11-24 | 2024-04-16 | 克斯美库股份有限公司 | Clamping system |
| WO2022172636A1 (en) * | 2021-02-12 | 2022-08-18 | 川崎重工業株式会社 | Hydraulic shovel drive system |
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