JPS62173230A - Hydraulic pressure circuit of injection molding machine - Google Patents
Hydraulic pressure circuit of injection molding machineInfo
- Publication number
- JPS62173230A JPS62173230A JP1299586A JP1299586A JPS62173230A JP S62173230 A JPS62173230 A JP S62173230A JP 1299586 A JP1299586 A JP 1299586A JP 1299586 A JP1299586 A JP 1299586A JP S62173230 A JPS62173230 A JP S62173230A
- Authority
- JP
- Japan
- Prior art keywords
- side chamber
- hydraulic
- rod side
- molding machine
- injection cylinder
- 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
Links
- 238000001746 injection moulding Methods 0.000 title claims abstract description 22
- 238000002347 injection Methods 0.000 claims abstract description 38
- 239000007924 injection Substances 0.000 claims abstract description 38
- 238000000034 method Methods 0.000 claims abstract description 37
- 238000010438 heat treatment Methods 0.000 claims abstract description 14
- 230000036316 preload Effects 0.000 claims description 9
- 239000002994 raw material Substances 0.000 claims description 4
- 239000011347 resin Substances 0.000 abstract description 10
- 229920005989 resin Polymers 0.000 abstract description 10
- 206010013642 Drooling Diseases 0.000 abstract description 6
- 208000008630 Sialorrhea Diseases 0.000 abstract description 6
- 238000010276 construction Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 5
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000005281 excited state Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000007665 sagging Methods 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
- B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
- B29C45/47—Means for plasticising or homogenising the moulding material or forcing it into the mould using screws
- B29C45/50—Axially movable screw
- B29C45/5008—Drive means therefor
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of 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、射出成形機の油圧回路に係り、特に射出工程
後、加熱シリンダ内に樹脂等の可塑化原料をチャージ工
程の完了直後にスクリュを強制後退させる所謂「サック
バック」ための油圧回路を有する射出成形機の油圧回路
の改良に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a hydraulic circuit for an injection molding machine, and in particular, the present invention relates to a hydraulic circuit for an injection molding machine, and in particular, after an injection process, a plasticizing raw material such as a resin is screwed into a heating cylinder immediately after the charging process is completed. This invention relates to an improvement in a hydraulic circuit for an injection molding machine having a hydraulic circuit for so-called "suckback" for forcibly retracting.
一般に射出成形機では、１；Ｉ段階の射出工程後、スク
リュを内１ａする加熱シリンダ内に樹脂を充填する工程
（以下、単にチャージ工程）に移行し。Generally, in an injection molding machine, after the injection process in step 1, the process moves to a process of filling a resin into a heating cylinder containing a screw (hereinafter simply referred to as a charging process).
そのチャージ工程完了直後にスクリュを強制後退させ、
加熱シリンダ内にチャージされている溶融樹脂の一部が
ドルーリング（Ｄｒｏｏｌｉｎ）ｚ・・・・・・はなた
れ）し、成形品のゲート付近に樹脂のＩＦれが発生ずる
のを防止するための「４ノーツクハツク」工程があり、
このサックハック工程後、射出工程に多行している。Immediately after the charging process is completed, the screw is forcibly retreated,
To prevent part of the molten resin charged in the heating cylinder from drooling and causing IF sagging of the resin near the gate of the molded product. There is a "4-note hatch" process,
After this suck-hack process, the injection process is repeated.
このような射出成形機の工程のための油圧回路として、
従来、第３図に示す油圧回路がある。第３図において、
チャージ工程中は、加熱シリンダ内の溶融樹脂によって
スクリュを後退させるのでピストンロッドＩＯＡは図中
矢印ａで示す方向に移動し、射出シリンダ１０のロッド
側室１０Ｂに４方弁１４のＡ−Ｔ流路を介してタンク１
７内の油が吸引される。そしてチャージ工程完了後、サ
ックバック工程に移行するため４方弁１４を５ＯＬＲの
励磁により切り替えて４方弁１４の流路Ｐ−Ａを介して
圧油を射出シリンダ１０のロッド側室１０Ｂに充満させ
ている。As a hydraulic circuit for such an injection molding machine process,
Conventionally, there is a hydraulic circuit shown in FIG. In Figure 3,
During the charging process, the screw is retracted by the molten resin in the heating cylinder, so the piston rod IOA moves in the direction shown by arrow a in the figure, and the A-T flow path of the four-way valve 14 is inserted into the rod side chamber 10B of the injection cylinder 10. through tank 1
The oil inside 7 is sucked out. After the charging process is completed, in order to proceed to the suckback process, the four-way valve 14 is switched by excitation of the 5OLR, and the rod side chamber 10B of the injection cylinder 10 is filled with pressure oil through the flow path PA of the four-way valve 14. ing.
しかしながら、上記のような射出成形機の油圧回路では
、チャージ工程時、ロッド側室１０Ｂ−Ａ−Ｔ管路に油
が完全に充満することなく、部分的に真空状態になって
いることがしばしば生じる。However, in the hydraulic circuit of the injection molding machine as described above, during the charging process, the rod side chamber 10B-A-T pipe line is not completely filled with oil and is often partially in a vacuum state. .
このため、チャージ工程完了後、サックバック工程に移
行する際、管路１０Ｂ−Ａ−Ｐおよび射出シリンダ１０
のロッド側室１０Ｂに油圧が完全に充満した後にピスト
ンロッドＩＯＡが後退し始めるので、その間０．５〜１
．Ｏ秒程度の時間を要する。Therefore, when moving to the suckback process after the completion of the charging process, the pipe line 10B-A-P and the injection cylinder 10
The piston rod IOA begins to retreat after the rod side chamber 10B is completely filled with hydraulic pressure, so the
．． It takes about 0 seconds.
一方、リリーフ弁１３によって保持されていたチャージ
工程中の背圧（射出シリンダ１０のヘッド側室１０ｃに
かかっていた圧力）が完全に下がるには１秒以上の時間
を要する。On the other hand, it takes one second or more for the back pressure (pressure applied to the head side chamber 10c of the injection cylinder 10) during the charging process, which was maintained by the relief valve 13, to completely decrease.
したがって、サックバックがスタートするまでに背圧に
よってスクリュが前進し、溶融した樹脂の一部がドルー
リングしてしまう現象が起り、次のサイクルのとき、成
形品のゲート付近に樹脂の垂れが発生し、成形品が表９
面不良となる問題がある。Therefore, by the time suckback starts, the screw advances due to back pressure, causing a phenomenon in which some of the molten resin drools, resulting in resin dripping near the gate of the molded product during the next cycle. The molded products are shown in Table 9.
There is a problem of surface defects.
本発明の目的は、上記した従来技術の問題点を解消し、
チャージ工程後のサックバック動作の始動を速やかにし
てドルーリングを防止し、表面不良のない成形品を得る
ことができる射出成形機の油圧回路を提供することにな
る。The purpose of the present invention is to solve the problems of the prior art described above,
To provide a hydraulic circuit for an injection molding machine that can quickly start a suckback operation after a charging process, prevent drooling, and obtain molded products without surface defects.
上記目的を達成するために、本発明は、チャージ工程中
に射出シリンダのロッド側室に予圧を与える手段を設け
、チャージ工程後、サックバック工程に移行したときに
射出シリンダのロッド側室の油圧が直ちに上昇し、背圧
に打ち勝って直ちにピストンロッドを強制後退させるよ
うにしたものである。In order to achieve the above object, the present invention provides means for applying preload to the rod side chamber of the injection cylinder during the charging process, so that when the suckback process is started after the charging process, the oil pressure in the rod side chamber of the injection cylinder is immediately reduced. The piston rod rises, overcomes the back pressure, and immediately forces the piston rod to retreat.
以下、図面に基づいて本発明の詳細な説明する。 Hereinafter, the present invention will be explained in detail based on the drawings.
第１図は、本発明の一実施例を示す射出成形機の油圧回
路図である。第１図において、チャージ用油圧モータ１
１とタンク３とを接続する油圧ラインの途中にチェック
弁１５が介設され、このチェック弁１５と油圧モータ１
１とを接続する油圧ラインの途中から射出シリンダ１０
のロッド側室１０Ｂに連通ずる油圧ライン１９が設けら
れ、この油圧ライン１９の途中にチェック弁１６が介設
されている。なお、第１図中２０はスクリュ、２１は加
熱シリンダ、２２は固定金型、２３は可動金型である。FIG. 1 is a hydraulic circuit diagram of an injection molding machine showing an embodiment of the present invention. In Fig. 1, the charging hydraulic motor 1
A check valve 15 is interposed in the middle of the hydraulic line connecting the hydraulic motor 1 and the tank 3, and the check valve 15 and the hydraulic motor 1
injection cylinder 10 from the middle of the hydraulic line connecting 1
A hydraulic line 19 communicating with the rod side chamber 10B is provided, and a check valve 16 is interposed in the middle of this hydraulic line 19. In FIG. 1, 20 is a screw, 21 is a heating cylinder, 22 is a fixed mold, and 23 is a movable mold.
第２図において、上記した構成以外は第１図に示す従来
の射出成形機の油圧回路と実質的に同じであるので第２
図と同一符号で示し詳細な説明は省略する。In FIG. 2, the configuration other than the above is substantially the same as the hydraulic circuit of the conventional injection molding machine shown in FIG.
Components are indicated by the same reference numerals as those in the figure, and detailed explanations will be omitted.
次に第１図に示す射出成形機の油圧回路の作用について
説明する。Next, the operation of the hydraulic circuit of the injection molding machine shown in FIG. 1 will be explained.
射出工程では、４方弁９のソレノイドＳＱＬ ＋が励磁
し、ロジック弁６．８を圧油が通過できるように設定さ
れる。このとき、モータ１によって駆動されるポンプ２
によりタンク３内の油は、比較電磁式圧力・流量制御弁
５を経てロジック弁６を通過し、射出シリンダｌＯのヘ
ッド側室１０Ｃに圧入される。この油圧作動によって、
ピストンロッドＩＯＡは、図中、矢印ａで示す方向と反
対に前進し、加熱シリンダ２１内のスクリュ２０の前進
動作により加熱シリンダ２１内の溶融樹脂は、固定金型
２２と可動金型２３とによって形成されるキャビティ内
に注入される。ピストンロッド１０Ａが、図中、矢印ａ
の方向に前進するとき、ロッド側室１０Ｂ内の油はロジ
ック弁８を通ってタンク３に戻る。In the injection process, the solenoid SQL + of the four-way valve 9 is energized and set to allow pressure oil to pass through the logic valve 6.8. At this time, pump 2 driven by motor 1
Accordingly, the oil in the tank 3 passes through the comparison electromagnetic pressure/flow rate control valve 5, the logic valve 6, and is pressurized into the head side chamber 10C of the injection cylinder IO. Through this hydraulic operation,
The piston rod IOA advances in the opposite direction to the direction indicated by arrow a in the figure, and the molten resin in the heating cylinder 21 is moved by the fixed mold 22 and the movable mold 23 due to the forward movement of the screw 20 in the heating cylinder 21. It is injected into the cavity that is formed. The piston rod 10A is indicated by arrow a in the figure.
When moving forward in the direction of , the oil in the rod side chamber 10B returns to the tank 3 through the logic valve 8.
次にチャージ工程に移行したとき４方弁９のソレノイド
５ＯＬｃを励磁し、ロジック弁７を通ってチャージ用油
圧モータ１１を回転させる。一方、４方弁１４は無励磁
の状態であるので射出シリンダ１０のロッド側室１０Ｂ
は、ｌ０Ｂ−Ａ−Ｔの流路によりタンク３と連通し、タ
ンク３内の油はロッド側室１０Ｂに吸引される。したが
って射出シリンダｌＯのピストンロッドＩＯＡは、加熱
シリンダ２１に樹脂がチャージされるにつれて後退し、
射出シリンダ１０のロッド側室１０Ｂにはタンク３から
の油が補充される。このとき、油圧モータ１１が回転し
、タンク３の油が油圧ライン１９を介して射出シリンダ
１０のロッド側室ｌＯＢに圧入され、ロッド側室１０Ｂ
に予圧を与えることになる。特に、チャージ用油圧モー
タ回路のチェック弁１５に発生する抵抗圧（約０．５ｋ
ｇ／−）は、更にチェック弁１６によって約０． ３５
ｋｇ／ｃ＋ｄの抵抗圧が発生し、この抵抗圧が常時射出
シリンダ１０のロッド側室１０Ｂに付与される。Next, when moving to the charging process, the solenoid 5OLc of the four-way valve 9 is energized, and the charging hydraulic motor 11 is rotated through the logic valve 7. On the other hand, since the four-way valve 14 is in a non-excited state, the rod side chamber 10B of the injection cylinder 10
communicates with the tank 3 through the flow path 10B-A-T, and the oil in the tank 3 is sucked into the rod side chamber 10B. Therefore, the piston rod IOA of the injection cylinder IO retreats as the heating cylinder 21 is charged with resin.
The rod side chamber 10B of the injection cylinder 10 is replenished with oil from the tank 3. At this time, the hydraulic motor 11 rotates, and the oil in the tank 3 is press-fitted into the rod side chamber 10B of the injection cylinder 10 through the hydraulic line 19.
This will give a preload to the In particular, the resistance pressure (approximately 0.5 k) generated in the check valve 15 of the charging hydraulic motor circuit
g/-) is further reduced to about 0.0 by the check valve 16. 35
A resistance pressure of kg/c+d is generated, and this resistance pressure is constantly applied to the rod side chamber 10B of the injection cylinder 10.
したがって、チャージ工程を完了して、サックハック工
程に移行したとき、４方弁１４の切り換えにより、Ｐ−
Ａ−１０Ｂの管路と油圧ライン１９からの圧油によって
射出フリツプのロッド側室ｌＯＢに圧油を送給できるた
め、直ちに油圧が上昇し、背圧に打ち勝ってピストンロ
ッドＩＯＡを強制後退させる、サックバック動作を行う
ことができる。Therefore, when the charge process is completed and the sack-huck process is started, the P-
Since pressure oil can be supplied to the rod side chamber IOB of the injection flip by the pressure oil from the pipe line A-10B and the hydraulic line 19, the oil pressure increases immediately, overcomes the back pressure, and forces the piston rod IOA to retreat. Can perform back movements.
第３図は、上記した本発明の油圧回路の動作と従来の油
圧回路の動作を対比して示している。第３図から、従来
の油圧回路では、射出シリンダ１０のロッド側室１０Ｂ
の油圧力は、チャージ完了時点からある一定時間の作動
遅れ（０，５〜１、 ０秒）後に徐々に上昇し、一定の
油圧に達している。したがって、従来の油圧回路では射
出シリンダ１０のヘッド側室１０Ｃにかかる圧力（背圧
）はチャージ完了時点から１秒以上が残存し、このため
、図中、斜線で示す領域の時間帯Ｌ１においてドルーリ
ングが生じる。FIG. 3 shows a comparison between the operation of the hydraulic circuit of the present invention described above and the operation of a conventional hydraulic circuit. From FIG. 3, it can be seen that in the conventional hydraulic circuit, the rod side chamber 10B of the injection cylinder 10
The hydraulic pressure gradually increases after a certain period of operation delay (0.5 to 1.0 seconds) from the time of completion of charging, and reaches a certain hydraulic pressure. Therefore, in the conventional hydraulic circuit, the pressure (back pressure) applied to the head side chamber 10C of the injection cylinder 10 remains for 1 second or more from the time of completion of charging. occurs.
一方、本実施例において、チャージ完了時点で、射出シ
リンダ１０のロッド側室１０Ｂの油圧が急激に上昇した
後、一定の油圧を達している。したがって本実施例の油
圧回路では、射出シリンダ１０Ｃにかかる圧力（背圧）
はチャージ完了時点で直ちに完全に下がっており、ドル
ーリングを生しる領域を有しない。On the other hand, in this embodiment, at the time of completion of charging, the oil pressure in the rod side chamber 10B of the injection cylinder 10 rapidly increases and then reaches a certain oil pressure. Therefore, in the hydraulic circuit of this embodiment, the pressure (back pressure) applied to the injection cylinder 10C
is completely lowered immediately after charging is completed, and there is no area where drooling occurs.
本発明において、射出シリンダ１０のロッド側室１０Ｂ
に予圧を与える時期は、チャージ工程中に亘ってもよい
が、チャージ工程の直後にサックバック動作を行うので
少なくともチャージ工程の完了直前に予圧を与えればよ
い。In the present invention, the rod side chamber 10B of the injection cylinder 10
The preload may be applied during the charging process, but since the suckback operation is performed immediately after the charging process, the preload may be applied at least immediately before the charging process is completed.
また射出フリツプ１０のロッド側室１０Ｂに予圧を与え
る手段は、図示した例に限定されるものではない。例え
ば予圧を与える他の手段として射出シリンダ１０のロッ
ド側室］Ｏｒ３よりも高い位置に油タンクを設置し、こ
の油タンクからの油圧ラインを射出シリンダ１０のロフ
ト側室１０Ｂのロフト側室１０Ｂに連通させ、その油圧
ラインの途中に電磁弁を介設し、チャージ工程の間に電
磁弁を開閉する機構としてもよい。Further, the means for applying preload to the rod side chamber 10B of the injection flip 10 is not limited to the illustrated example. For example, as another means of applying preload, an oil tank is installed at a position higher than the rod side chamber] Or3 of the injection cylinder 10, and a hydraulic line from this oil tank is communicated with the loft side chamber 10B of the injection cylinder 10, A mechanism may also be adopted in which a solenoid valve is interposed in the middle of the hydraulic line to open and close the solenoid valve during the charging process.
以上のように本発明によれば、チャージ工程中の少なく
ともチャージ工程の完了直前に射出シリンダのロッド側
室に予圧を与える手段を設けたので、チャージ工程後の
サックバック動作の始動を運やかに行うことができる。As described above, according to the present invention, the means for applying preload to the rod side chamber of the injection cylinder at least immediately before the completion of the charging process is provided, so that the suckback operation after the charging process can be started successfully. It can be carried out.
このため、加熱シリンダ内にチャージされている可塑化
原料がドルーリングしてくることを完全に防止でき、成
形品の品質の安定化を図ることができる。またサックバ
ック動作の開始毎に射出シリンダのロフト側室の油圧が
直ちに上昇する。したがって、従来、この油圧上昇に要
した時間（０，５〜１．０秒）が約０．０１秒程度に短
縮され、サイクルアップとなる。近年の小型高速射出成
形機ではサイクルが１０秒前後であるので、サイクルア
ップにより５〜ｌＯ％程度の生産率向上を図ることがで
きる。Therefore, drooling of the plasticizing raw material charged in the heating cylinder can be completely prevented, and the quality of the molded product can be stabilized. Moreover, the oil pressure in the loft side chamber of the injection cylinder immediately increases each time the suckback operation starts. Therefore, the time (0.5 to 1.0 seconds) conventionally required for this oil pressure increase is shortened to about 0.01 seconds, resulting in a cycle up. Since the cycle time of recent small high-speed injection molding machines is around 10 seconds, it is possible to improve the production rate by about 5 to 10% by increasing the cycle.
第１図は本発明にかかる射出成形機の油圧回路図、第２
図は従来の射出成形機の油圧回路図、第３図は従来の従
来の射出成形機の油圧回路と本発明にかかる射出成形機
の油圧回路とを対比して示す動作図である。
２・・・・・砦由圧モータ、
５・・・・・・比例電磁式圧力・流量制御弁、６．７．
８・・・・・・ロジック弁、
９．１２．１４・・・・・・ソレノイド、１０・・・・
・・射出シリンダ、
１０Ａ・・・・・・ピストンロッド、
１０Ｂ・・・・・・ロッド側室、ＩＯＣ・・・・・・ヘ
ッド側室、１１・・・・・・チャージ用油圧モータ、１
５．１６・・・・・・チェック弁、
１９・・・・・・油圧ライン、 ２０・・・・・・ス
クリュ、２１・・・・・・加熱シリンダ、
２２・・・・・・固定金型、 ２３・・・・・・可動
金型。
第２図
県
；員Figure 1 is a hydraulic circuit diagram of an injection molding machine according to the present invention, Figure 2 is a hydraulic circuit diagram of an injection molding machine according to the present invention;
The figure is a hydraulic circuit diagram of a conventional injection molding machine, and FIG. 3 is an operation diagram showing a comparison between the hydraulic circuit of the conventional injection molding machine and the hydraulic circuit of the injection molding machine according to the present invention. 2...Fort pressure motor, 5...Proportional electromagnetic pressure/flow control valve, 6.7.
8...Logic valve, 9.12.14...Solenoid, 10...
...Injection cylinder, 10A...Piston rod, 10B...Rod side chamber, IOC...Head side chamber, 11...Hydraulic motor for charging, 1
5.16...Check valve, 19...Hydraulic line, 20...Screw, 21...Heating cylinder, 22...Fixing metal Mold, 23...Movable mold. Figure 2 prefecture; member
Claims (3)
シリンダ内のスクリュを前進させるための油圧回路と、
加熱シリンダ内に可塑化原料をチャージする際に射出シ
リンダのロッド側室に油を充満させるための油圧回路を
備えた射出成形機の油圧回路において、チャージ工程中
、少なくとも加熱シリンダ内への可塑化原料のチャージ
完了直前に射出シリンダのロッド側室に予圧を与える手
段を設けたことを特徴とする射出成形機の油圧回路。(1) A hydraulic circuit for supplying hydraulic pressure to the head side chamber of the injection cylinder to advance the screw in the heating cylinder;
In the hydraulic circuit of an injection molding machine equipped with a hydraulic circuit for filling the rod side chamber of the injection cylinder with oil when charging the plasticizing raw material into the heating cylinder, at least the plasticizing raw material is charged into the heating cylinder during the charging process. A hydraulic circuit for an injection molding machine, comprising means for applying preload to a rod side chamber of an injection cylinder immediately before charging is completed.
ら分岐されるとともに前記射出シリンダのロッド側室に
連通された油圧ラインからなる特許請求の範囲第（１）
項記載の射出成形機の油圧回路。(2) The means for applying preload comprises a hydraulic line branched from the outlet side of the hydraulic motor and communicated with the rod side chamber of the injection cylinder.
Hydraulic circuit of the injection molding machine described in Section 1.
いる特許請求の範囲第（２）項記載の射出成形機の油圧
回路。(3) A hydraulic circuit for an injection molding machine according to claim (2), wherein a check valve is interposed in the middle of the hydraulic line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1299586A JPS62173230A (en) | 1986-01-25 | 1986-01-25 | Hydraulic pressure circuit of injection molding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1299586A JPS62173230A (en) | 1986-01-25 | 1986-01-25 | Hydraulic pressure circuit of injection molding machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62173230A true JPS62173230A (en) | 1987-07-30 |
| JPH0317660B2 JPH0317660B2 (en) | 1991-03-08 |
Family
ID=11820785
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1299586A Granted JPS62173230A (en) | 1986-01-25 | 1986-01-25 | Hydraulic pressure circuit of injection molding machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62173230A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01122916U (en) * | 1988-02-16 | 1989-08-21 | ||
| JPH04272819A (en) * | 1991-02-27 | 1992-09-29 | Japan Steel Works Ltd:The | Hydraulic circuit for injection molding machine |
| EP0740992A2 (en) * | 1995-05-05 | 1996-11-06 | MANNESMANN Aktiengesellschaft | Plastic injection moulding machine with rotational and linear drive |
-
1986
- 1986-01-25 JP JP1299586A patent/JPS62173230A/en active Granted
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01122916U (en) * | 1988-02-16 | 1989-08-21 | ||
| JPH0440899Y2 (en) * | 1988-02-16 | 1992-09-25 | ||
| JPH04272819A (en) * | 1991-02-27 | 1992-09-29 | Japan Steel Works Ltd:The | Hydraulic circuit for injection molding machine |
| EP0740992A2 (en) * | 1995-05-05 | 1996-11-06 | MANNESMANN Aktiengesellschaft | Plastic injection moulding machine with rotational and linear drive |
| EP0740992A3 (en) * | 1995-05-05 | 1997-06-11 | Mannesmann Ag | Plastic injection moulding machine with rotational and linear drive |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0317660B2 (en) | 1991-03-08 |
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|---|---|---|---|
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