JP3250179B2 - Mold clamping device with mold opening / closing cylinder with servo valve - Google Patents
Mold clamping device with mold opening / closing cylinder with servo valveInfo
- Publication number
- JP3250179B2 JP3250179B2 JP16724098A JP16724098A JP3250179B2 JP 3250179 B2 JP3250179 B2 JP 3250179B2 JP 16724098 A JP16724098 A JP 16724098A JP 16724098 A JP16724098 A JP 16724098A JP 3250179 B2 JP3250179 B2 JP 3250179B2
- Authority
- JP
- Japan
- Prior art keywords
- mold
- servo valve
- closing cylinder
- closing
- mold 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)
- Injection Moulding Of Plastics Or The Like (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、合成樹脂の成形
に使用されるサーボバルブ付き型開閉シリンダを備えた
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 having a mold opening / closing cylinder with a servo valve used for molding a synthetic resin.
【０００２】[0002]
【発明が解決しようとする課題】型締シリンダにサーボ
バルブを採用し、また型締ピストンを前後面の受圧面積
が同一の両ロッド形に構成して、型締シリンダにより型
閉から型締を連続的に行えるようにし、これにより型開
閉シリンダを省略した型締装置が知られている。この型
締装置では型締ピストンを両ロッド形に構成しているこ
とから、型開から型締に移行した後の昇圧などの圧力制
御は容易に行えるが、主たる目的が高圧力の発生にある
型締シリンダを型開閉シリンダに兼用しているため、型
開閉シリンダを備えた型締装置に比べて型開閉速度が遅
くなりがちで、高速での型開閉が要求される成形機の型
締装置としては使用され難く、電力消費量も大きいとい
う課題を有する。SUMMARY OF THE INVENTION A servo valve is used for a mold clamping cylinder, and a mold clamping piston is formed in a double rod shape having the same pressure receiving area on the front and rear surfaces. 2. Description of the Related Art There is known a mold clamping device which enables continuous operation, thereby omitting a mold opening / closing cylinder. In this mold clamping device, since the clamping piston is configured as a double rod type, pressure control such as pressure increase after shifting from mold opening to mold clamping can be easily performed, but the main purpose is to generate high pressure. Since the mold closing cylinder is also used as the mold opening / closing cylinder, the mold opening / closing speed tends to be slower than that of the mold closing apparatus equipped with the mold opening / closing cylinder. Is difficult to use, and the power consumption is large.
【０００３】また前記と同様にサーボバルブと前後面の
受圧面積が同一の両ロッド形の型締ピストンとを採用し
て、光ディスクなどの薄物の成形品の射出圧縮成形を行
えるようにした型締装置も知られているが、この場合で
も型開閉速度に課題を有するので、型開閉距離を大きく
設定して高速型開閉を行う必要のある射出圧縮成形に
は、型開閉シリンダを備えたものが要求され、その使用
は型開閉距離が小さくて済む薄物の成形品の射出圧縮成
形に限られるものであった。In the same manner as above, a servo valve and a two-rod type clamping piston having the same pressure receiving area on the front and rear surfaces are employed to perform injection compression molding of a thin molded product such as an optical disk. Although an apparatus is also known, even in this case, there is a problem with the mold opening / closing speed, so that injection compression molding which needs to set a large mold opening / closing distance to perform high-speed mold opening / closing includes a mold equipped with a mold opening / closing cylinder. It has been required, and its use has been limited to injection compression molding of a thin molded article requiring a short mold opening / closing distance.
【０００４】この発明は、上記従来の型締シリンダにサ
ーボバルブを採用した型締装置の課題を解決するために
考えられたものであって、その目的は、サーボバルブを
備えた型締シリンダを採用した型締装置であっても、型
開閉シリンダとの併用を可能として高速型開閉が行え、
またサーボバルブを型開閉シリンダと共用できるように
して、速度及び位置さらには圧力等の制御を高精度に行
い得る新たなサーボバルブ付きの型開閉装置を備えた型
締装置を提供することにある。SUMMARY OF THE INVENTION The present invention has been conceived to solve the problem of a mold clamping device using a servo valve in the conventional mold clamping cylinder, and an object thereof is to provide a mold clamping cylinder equipped with a servo valve. Even with the adopted mold clamping device, it can be used together with the mold opening / closing cylinder to perform high-speed mold opening and closing.
Another object of the present invention is to provide a mold clamping device having a new mold opening / closing device with a servo valve, which can share a servo valve with a mold opening / closing cylinder and can control speed, position, pressure and the like with high accuracy. .
【０００５】[0005]
【課題を解決するための手段】上記目的によるこの発明
は、型締シリンダとその後端の型開閉シリンダのピスト
ンを、両シリンダにわたり貫設した同径のピストンロッ
ドにより、前後面の受圧面積が同一の両ロッド形に構成
して、型締シリンダにサーボバルブを取付け、そのサー
ボバルブを型締シリンダの前後油室の油路に接続する一
方、型開閉シリンダの前後油室の油路に切換バルブを介
し接続して、型締シリンダと型開閉シリンダのサーボバ
ルブとして共用できるように構成してなる、というもの
である。According to the present invention for the above object, the pistons of the mold closing cylinder and the mold opening / closing cylinder at the rear end thereof have the same pressure receiving area on the front and rear surfaces by a piston rod having the same diameter penetrating through both cylinders. The servo valve is mounted on the mold clamping cylinder, and the servo valve is connected to the oil passage of the front and rear oil chambers of the mold closing cylinder, while the switching valve is connected to the oil passage of the front and rear oil chambers of the mold opening and closing cylinder. And the motor can be shared as a servo valve for the mold closing cylinder and the mold opening / closing cylinder.
【０００６】このような型締装置では、サーボバルブを
交互に使い分けて型開閉シリンダによる高速型開閉と、
型締シリンダによる高圧型締の両方を行うことができ、
また応答性もよいので高速型閉から型締への移行をスム
ーズに行え、射出圧縮成形では圧縮に際する位置及び圧
力制御が高精度に行えることから、高品質が要求される
ＣＤ，ＤＶＤなど光ディスクの成形も容易に行い得る。In such a mold clamping device, high-speed mold opening / closing by a mold opening / closing cylinder by alternately using servo valves,
Both high pressure mold clamping with mold clamping cylinder can be performed,
In addition, the response is good, so that the transition from high-speed mold closing to mold clamping can be performed smoothly. In injection compression molding, since the position and pressure during compression can be controlled with high precision, high quality CDs, DVDs, etc. are required. The optical disk can be easily formed.
【０００７】[0007]
【発明の実施の形態】図中１は型締シリンダ、２は型締
シリンダ１の後端に連設した型開閉シリンダで、その両
方のピストン３，４は、両シリンダにわたり貫設した同
径のピストンロッド５により、それぞれ前後面の受圧面
積が同一でピストン間のロッド５ａを共用する両ロッド
形に構成されている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the drawings, reference numeral 1 denotes a mold clamping cylinder, 2 denotes a mold opening / closing cylinder connected to the rear end of the mold clamping cylinder 1, and both pistons 3 and 4 have the same diameter penetrating both cylinders. The piston rods 5 have the same pressure receiving area on the front and rear surfaces, and are formed into a double rod shape that shares the rod 5a between the pistons.
【０００８】上記ピストンロッド５の先端には、タイバ
ー６，６に挿通して固定盤７に対設した可動盤８が連結
してある。また後端部５ｂは縮径されて、その外周に型
締ピストン３よりも小径の型開閉ピストン４を開口周囲
に一体形成したロッドケース９が、シールリング１０を
施して水密に嵌合してある。このロッドケース９はピン
１１によりピストンロッド５に止着されて、型開閉ピス
トン４の後部ロッドを構成している。このような構成で
は型開閉ピストン４及び後部ロッド９の製作が容易に精
度よく行える。A movable plate 8 which is inserted into the tie bars 6 and 6 and opposed to the fixed plate 7 is connected to the tip of the piston rod 5. The rear end portion 5b is reduced in diameter, and a rod case 9 in which a mold opening / closing piston 4 having a smaller diameter than the mold clamping piston 3 is integrally formed around the opening on the outer periphery thereof is provided with a seal ring 10 and fitted in a watertight manner. is there. The rod case 9 is fixed to the piston rod 5 by a pin 11 and constitutes a rear rod of the mold opening / closing piston 4. With such a configuration, the mold opening / closing piston 4 and the rear rod 9 can be easily and accurately manufactured.
【０００９】１２は上記型締シリンダ１に取付けたサー
ボバルブで、上記型締ピストン３により区画形成された
型締シリンダ１の前後油室の油路１３，１４と接続さ
れ、また上記型開閉ピストン４により区画形成された型
開閉シリンダ２の前後油室の油路１５，１６にも、図で
は省略したが、切換バルブを介し接続して共用できるよ
うにしてある。この油路１５，１６への接続はできるだ
け短く、また接続距離をできるだけ同一に設定するのが
好ましく、このような設定では型開閉シリンダ２の応答
性が一段と向上する。Reference numeral 12 denotes a servo valve mounted on the mold clamping cylinder 1, which is connected to oil passages 13 and 14 of the front and rear oil chambers of the mold clamping cylinder 1 defined by the mold clamping piston 3, and is provided with the mold opening / closing piston. Although not shown in the figure, the oil passages 15 and 16 of the front and rear oil chambers of the mold opening / closing cylinder 2 defined by 4 are also connected via a switching valve so that they can be shared. It is preferable that the connection to the oil passages 15 and 16 be as short as possible and that the connection distance be set as equal as possible. With such a setting, the responsiveness of the mold opening / closing cylinder 2 is further improved.
【００１０】上記構成の型締装置では、切換バルブによ
り流路を型開閉シリンダ２側に切換え、型締シリンダ１
の前後油室に負圧及び油圧抵抗が生じないように油圧回
路を設定してのち、サーボバルブ１２の内部のスプール
（図は省略）を移動して、型開閉シリンダ２の後油室１
８又は前油室１７に圧油を供給すると、型開閉ピストン
４がピストンロッド５を同じくする型締ピストン３と一
緒に、スプールの移動位置まで高速で前進又は後退して
型閉又は型開を行う。この移動はピストン前後面の受圧
面積を両ロッド形として同一にしたことから、いずれ側
においても応答よく行われるようになる。In the mold clamping device having the above structure, the flow passage is switched to the mold opening / closing cylinder 2 side by the switching valve, and the mold clamping cylinder 1 is closed.
After setting a hydraulic circuit so that a negative pressure and a hydraulic resistance do not occur in the front and rear oil chambers, the spool (not shown) inside the servo valve 12 is moved, and the rear oil chamber 1 of the mold opening / closing cylinder 2 is moved.
When the pressurized oil is supplied to the front oil chamber 8 or the front oil chamber 17, the mold opening / closing piston 4 moves forward or backward at a high speed to the moving position of the spool together with the mold clamping piston 3 having the same piston rod 5 to close or close the mold. Do. This movement can be performed responsively on either side since the pressure receiving area on the front and rear surfaces of the piston is made the same for both rods.
【００１１】また型閉後に切換バルブにより流路を型締
シリンダ１側に切換え、型開閉シリンダ２の前後油室に
負圧及び油圧抵抗が生じないように油圧回路を設定して
のち、サーボバルブ１２のスプールを移動して型締シリ
ンダ１の油路１４から後油室に圧油を供給すると、型締
ピストン３がスプールの停止位置まで前進して型締を行
う。この場合においてもピストン前後面の受圧面積を両
ロッド形として同一にしたことから、いずれ側において
も応答よく行われるようになる。After the mold is closed, the flow path is switched to the mold clamping cylinder 1 side by a switching valve, and a hydraulic circuit is set so that a negative pressure and a hydraulic resistance are not generated in the front and rear oil chambers of the mold opening and closing cylinder 2. When pressure oil is supplied to the rear oil chamber from the oil passage 14 of the mold clamping cylinder 1 by moving the spool 12, the mold clamping piston 3 advances to the stop position of the spool to perform mold clamping. Also in this case, since the pressure receiving areas on the front and rear surfaces of the piston are the same for both rods, the response can be performed on either side with good response.
【００１２】したがって、サーボバルブ１２の操作をも
って、高速型閉から型締又は型締から高速型開への移行
及び制御を確実に行うことが可能となり、また速度及び
位置、圧力等の制御も高精度に行えるようになる。Therefore, by operating the servo valve 12, the transition and control from high-speed mold closing to mold clamping or from mold clamping to high-speed mold opening can be reliably performed, and the control of speed, position, pressure, etc. is also high. It can be performed with high accuracy.
【００１３】たとえば、型開距離の関係から可動盤８の
移動ストロークが長く設定されるような型締装置の場合
でも、型開閉シリンダ２によるピストンロッド５の進退
移動は高速となるので、予め設定された位置間の開閉速
度は高速化され、またサーボバルブ１２による速度制御
によって、設定位置での停止も確実なものとなる。For example, even in the case of a mold clamping device in which the moving stroke of the movable platen 8 is set to be long from the relationship of the mold opening distance, the piston rod 5 can be moved forward and backward by the mold opening / closing cylinder 2 at a high speed. The opening / closing speed between the set positions is increased, and the speed control by the servo valve 12 ensures the stop at the set position.
【００１４】さらにまた射出圧縮成形では、射出充填後
の圧縮代を設ける必要性から、可動盤８に取付けた可動
金型（図は省略）の位置決めを高精度に行う必要がある
が、サーボバルブ１２の共用によって、型締シリンダ１
と型開閉シリンダ２の何れかの操作により高精度に行い
得るので、成形品が光ディスクのような薄物で精度が要
求される成形品をも高品質に成形することが可能とな
る。Furthermore, in the injection compression molding, it is necessary to provide a compression allowance after injection filling, so that it is necessary to position a movable mold (not shown) attached to the movable plate 8 with high precision. Mold sharing cylinder 1
And the operation of the mold opening / closing cylinder 2 can be performed with high accuracy, so that it is possible to mold a molded product such as an optical disk that is thin and requires high precision with high quality.
【図１】 この発明のサーボバル付き型開閉シリンダを
備えた型締装置の型開時における要部縦断側面図であ
る。FIG. 1 is a longitudinal sectional side view of a main part of a mold clamping device provided with a mold opening / closing cylinder with a servo valve according to the present invention when the mold is opened.
【図２】 同上の型開閉シリンダ部分の半部縦断側面図
である。FIG. 2 is a half vertical sectional side view of a mold opening / closing cylinder part according to the first embodiment;
【図３】 型閉時における型開閉シリンダ部分の半部縦
断側面図である。FIG. 3 is a half vertical sectional side view of a mold opening / closing cylinder portion when the mold is closed.
１ 型締シリンダ ２ 型開閉シリンダ ３ 型締ピストン ４ 型開閉ピストン ５ ピストンロッド ５ａ ピストン間のロッド ５ｂ ロッド後端部 ５ｃ 後部ロッド ９ ロッドケース １２ サーボバルブ １７ 型開閉シリンダの前部油室 １８ 型開閉シリンダの後部油室 Reference Signs List 1 mold clamping cylinder 2 mold opening / closing cylinder 3 mold clamping piston 4 mold opening / closing piston 5 piston rod 5a rod between pistons 5b rod rear end portion 5c rear rod 9 rod case 12 servo valve 17 front oil chamber of mold opening / closing cylinder 18 mold opening / closing Rear oil chamber of cylinder
フロントページの続き (56)参考文献 特開 平７−186217（ＪＰ，Ａ) 特開 平７−125027（ＪＰ，Ａ) 特開 昭55−81100（ＪＰ，Ａ) 特開 平９−290449（ＪＰ，Ａ) 特開 昭48−17176（ＪＰ，Ａ) 特開 昭59−115821（ＪＰ，Ａ) 特公 昭46−14544（ＪＰ，Ｂ２) (58)調査した分野(Int.Cl.7，ＤＢ名) B29C 45/00 - 45/82 B29C 33/20 - 33/24 Continuation of the front page (56) References JP-A-7-186217 (JP, A) JP-A-7-125027 (JP, A) JP-A-55-81100 (JP, A) JP-A-9-290449 (JP, A) JP-A-48-17176 (JP, A) JP-A-59-115821 (JP, A) JP-B-46-14544 (JP, B2) (58) Fields investigated (Int. Cl. 7 , DB Name) B29C 45/00-45/82 B29C 33/20-33/24
Claims (1)
ダのピストンを、両シリンダにわたり貫設した同径のピ
ストンロッドにより、前後面の受圧面積が同一の両ロッ
ド形に構成して、型締シリンダにサーボバルブを取付
け、そのサーボバルブを型締シリンダの前後油室の油路
に接続する一方、型開閉シリンダの前後油室の油路に切
換バルブを介し接続して、型締シリンダと型開閉シリン
ダのサーボバルブとして共用できるように構成してなる
ことを特徴とするサーボバルブ付き型開閉シリンダを備
えた型締装置。1. A mold clamping cylinder and a piston of a mold opening / closing cylinder at a rear end thereof are constituted by a piston rod of the same diameter penetrating both cylinders to form a double rod shape having the same pressure receiving area on front and rear surfaces. A servo valve is mounted on the cylinder, and the servo valve is connected to the oil passage of the front and rear oil chambers of the mold closing cylinder, while the servo valve is connected to the oil passage of the front and rear oil chambers of the mold opening / closing cylinder via a switching valve. A mold clamping device comprising a mold opening / closing cylinder with a servo valve, wherein the mold clamping device is configured to be commonly used as a servo valve of the opening / closing cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16724098A JP3250179B2 (en) | 1998-06-15 | 1998-06-15 | Mold clamping device with mold opening / closing cylinder with servo valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16724098A JP3250179B2 (en) | 1998-06-15 | 1998-06-15 | Mold clamping device with mold opening / closing cylinder with servo valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000000863A JP2000000863A (en) | 2000-01-07 |
| JP3250179B2 true JP3250179B2 (en) | 2002-01-28 |
Family
ID=15846067
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16724098A Expired - Fee Related JP3250179B2 (en) | 1998-06-15 | 1998-06-15 | Mold clamping device with mold opening / closing cylinder with servo valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3250179B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102975314B (en) * | 2012-12-03 | 2014-12-17 | 辽宁工业大学 | Self-locking locking mechanism |
-
1998
- 1998-06-15 JP JP16724098A patent/JP3250179B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2000000863A (en) | 2000-01-07 |
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