JPH10166407A - Mold clamping device of injection molding machine - Google Patents
Mold clamping device of injection molding machineInfo
- Publication number
- JPH10166407A JPH10166407A JP32895596A JP32895596A JPH10166407A JP H10166407 A JPH10166407 A JP H10166407A JP 32895596 A JP32895596 A JP 32895596A JP 32895596 A JP32895596 A JP 32895596A JP H10166407 A JPH10166407 A JP H10166407A
- Authority
- JP
- Japan
- Prior art keywords
- auxiliary
- mold clamping
- cylinder
- oil chamber
- 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.)
- Granted
Links
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、キャビティ容積を
多段に変えて成形を行う射出圧縮成形を可能とする射出
成形機の型締装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mold clamping device for an injection molding machine which enables injection compression molding in which molding is performed while changing the cavity volume in multiple stages.
【０００２】[0002]
【従来の技術】射出圧縮成形においては、金型キャビテ
ィ内に射出された溶融樹脂材料を、可動盤を段階的に前
進させることにより、段階的に圧縮することが必要な場
合があるが、これを行う型締装置として、型締シリンダ
の型締側油室に油圧源を連絡した管路の途中に分岐管を
接続してその分岐管に電磁切換弁と圧力制御弁とを設
け、上記管路の分岐管の上流側（油圧源側）にサーボ弁
を設けるとともに、管路の分岐管の下流側（型締シリン
ダ側）にパイロットチェック弁を設け、サーボ弁と電磁
切換弁及びパイロットチェック弁の切換えで射出樹脂材
料の多段圧縮を行うものが提案されている（特開平６−
３０４９８５号公報）。2. Description of the Related Art In injection compression molding, it is sometimes necessary to compress a molten resin material injected into a mold cavity stepwise by moving a movable platen stepwise. A branch pipe is connected in the middle of a pipe that connects a hydraulic source to a mold-side oil chamber of a mold cylinder, and an electromagnetic switching valve and a pressure control valve are provided in the branch pipe. A servo valve is provided on the upstream side (oil pressure source side) of the branch pipe of the road, and a pilot check valve is provided on the downstream side (mold clamping cylinder side) of the branch pipe of the pipe. The servo valve, the electromagnetic switching valve, and the pilot check valve are provided. A multi-stage compression of the injection resin material is proposed by changing the setting (Japanese Patent Application Laid-Open No. 6-1994).
No. 304985).
【０００３】[0003]
【発明が解決しようとする課題】上記射出成形機の型締
装置は、油圧回路及びその制御が複雑になり、また既存
の機械に後から追加できないという問題点がある。ま
た、サーボ弁を使用しているため、その安定した円滑な
作動を維持するために、作動油の管理及び運転調整が大
変である。The above-described mold clamping device for an injection molding machine has a problem that a hydraulic circuit and its control become complicated and that it cannot be added to an existing machine later. In addition, since the servo valve is used, it is difficult to manage the hydraulic oil and adjust the operation in order to maintain the stable and smooth operation.
【０００４】本発明の一つの目的は、油圧回路の構成が
簡単で制御が容易であり、かつ作動油の管理及び運転調
整も容易な射出成形機の型締装置を提供することであ
り、他の目的は、既存の型締装置の改良が容易な射出成
形機の型締装置を提供することである。[0004] One object of the present invention is to provide a mold clamping device for an injection molding machine, which has a simple structure of a hydraulic circuit and is easy to control, and also facilitates management and operation adjustment of hydraulic oil. SUMMARY OF THE INVENTION It is an object of the present invention to provide a mold clamping device for an injection molding machine in which an existing mold clamping device can be easily improved.
【０００５】また本発明の別の目的は、金型を、パーテ
ング位置から精密に微小量開いた状態で停止させること
ができる射出成形機の型締装置を提供することであり、
更に他の目的は、型締シリンダの圧縮ストロークを微調
整することができる射出成形機の型締装置を提供するこ
とである。Another object of the present invention is to provide a mold clamping device for an injection molding machine, which can stop a mold in a state where the mold is opened from a parting position precisely and minutely.
Still another object is to provide a mold clamping device of an injection molding machine which can finely adjust a compression stroke of a mold clamping cylinder.
【０００６】[0006]
【課題を解決するための手段】上記の少なくとも一つの
目的を達成するために、本発明に係る射出成形機の型締
装置は、電磁切換弁を備えた主管路によって型締側油室
とロッド側油室とに油圧源が連絡された型締シリンダで
可動盤を動かして該可動盤と固定盤との間で金型を型締
めする射出成形機の型締装置において、補助シリンダ
を、補助電磁切換弁を備えた補助管路によって駆動油室
と補助油室とを油圧源に連絡して設け、上記補助シリン
ダの補助油室に連絡された補助管路の補助電磁切換弁の
下流側に、上記型締シリンダの型締側油室に連絡された
連絡管路を、連絡電磁切換弁を介して連絡した構成とし
た。In order to achieve at least one of the above-mentioned objects, a mold clamping device for an injection molding machine according to the present invention comprises a main passage provided with an electromagnetic switching valve, and a mold-side oil chamber and a rod. In a mold clamping device of an injection molding machine for moving a movable plate with a mold clamping cylinder in which a hydraulic pressure source is connected to a side oil chamber and clamping a mold between the movable plate and the fixed plate, an auxiliary cylinder is provided with an auxiliary cylinder. A drive oil chamber and an auxiliary oil chamber are provided in communication with an oil pressure source by an auxiliary line having an electromagnetic switching valve, and the auxiliary oil passage is connected to the auxiliary oil chamber of the auxiliary cylinder, and is provided downstream of the auxiliary electromagnetic switching valve. In addition, the communication pipe line connected to the mold-side oil chamber of the mold-clamping cylinder is connected via a communication electromagnetic switching valve.
【０００７】複数の補助シリンダを互いに並列に設ける
ことができる。型締シリンダのロッド側油室に連絡され
た副連絡管路を、連絡管路に副電磁切換弁を介して連絡
し、また、連絡管路を副連絡管路に副電磁切換弁で連通
させた際に型締シリンダの型締側油室に連通される副電
磁切換弁のポートに圧力制御弁を接続することが好まし
い。１以上の補助シリンダに、該補助シリンダのストロ
ークを規制する規制手段を設けることができる。[0007] A plurality of auxiliary cylinders can be provided in parallel with one another. The auxiliary communication line connected to the rod-side oil chamber of the mold clamping cylinder is connected to the communication line via the auxiliary electromagnetic switching valve, and the communication line is connected to the auxiliary communication line via the auxiliary electromagnetic switching valve. In such a case, it is preferable to connect a pressure control valve to a port of the auxiliary solenoid-operated directional control valve which is communicated with the mold clamping side oil chamber of the mold clamping cylinder. One or more auxiliary cylinders may be provided with a restricting means for restricting the stroke of the auxiliary cylinder.
【０００８】[0008]
【発明の実施の形態】発明の実施の形態を実施例に基づ
き図面を参照して説明する。図１は本発明に係る射出成
形機の型締装置の実施の形態を示す。図中符号１は型締
シリンダである。型締シリンダ１は、トグル機構２を介
して可動盤３をタイバ４に沿って移動させて可動盤３と
固定盤５との間で金型３ａ、５ａを型締めするものであ
り、ピストンロッド１ｒをトグル機構２のクロッスヘッ
ド２ａに結合してエンドプレート６に固定されている。
タイバ４はその両端を固定盤５とエンドプレート６に固
定して複数本設けられ（図には１本しか示されていな
い。）、可動盤３を摺動自在に支持している。DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described based on embodiments with reference to the drawings. FIG. 1 shows an embodiment of a mold clamping device of an injection molding machine according to the present invention. In the figure, reference numeral 1 denotes a mold clamping cylinder. The mold clamping cylinder 1 is for moving the movable platen 3 along the tie bar 4 via the toggle mechanism 2 to clamp the molds 3a and 5a between the movable platen 3 and the fixed platen 5, and includes a piston rod. 1 r is connected to the cross head 2 a of the toggle mechanism 2 and fixed to the end plate 6.
A plurality of tie bars 4 are provided with both ends fixed to a fixed plate 5 and an end plate 6 (only one is shown in the figure), and slidably support the movable plate 3.
【０００９】そして、型締シリンダ１の型締側油室１ａ
とロッド側油室１ｂには、電磁切換弁８を備えた主管路
９ａ、９ｂによって油圧源１０が連絡されている。クロ
スヘッド２ａには該クロスヘッド２ａの移動位置を検出
する位置センサ１１が付設されている。電磁切換弁８
は、中立位置で主管路９ａと油圧源１０の連絡を断つと
ともに他の主管路９ｂを油タンク１２に連絡し、またソ
レノイドａが励磁されると、主管路９ａを油圧源１０に
連絡するとともに他の主管路９ｂを油タンク１２に連絡
し、更にソレノイドｂが励磁されると、主管路９ａを油
タンク１２に連絡するとともに他の主管路９ｂを油圧源
１０に連絡する構造となっている。The mold clamping side oil chamber 1a of the mold clamping cylinder 1
A hydraulic source 10 is connected to the rod-side oil chamber 1b by main pipelines 9a and 9b provided with an electromagnetic switching valve 8. The crosshead 2a is provided with a position sensor 11 for detecting the moving position of the crosshead 2a. Solenoid switching valve 8
Disconnects the main line 9a from the hydraulic source 10 at the neutral position, and connects the other main line 9b to the oil tank 12, and when the solenoid a is excited, connects the main line 9a to the hydraulic source 10 and The other main line 9b is connected to the oil tank 12, and when the solenoid b is excited, the main line 9a is connected to the oil tank 12 and the other main line 9b is connected to the hydraulic power source 10. .
【００１０】また、符号２０Ｌ、２０Ｍ、２０Ｓはいず
れも補助シリンダであり、互いに並列に設けられてい
る。補助シリンダ２０Ｌ、２０Ｍ、２０Ｓは大（添字
Ｌ）、中（Ｍ）、小（Ｓ）と容量が異なるが、機能は同
一であるので、以下、紛らわしくない限り添字Ｌ、Ｍ、
Ｓを外して説明する。Reference numerals 20L, 20M, and 20S denote auxiliary cylinders, which are provided in parallel with each other. The auxiliary cylinders 20L, 20M, and 20S have different capacities, large (subscript L), medium (M), and small (S), but since they have the same function, the following subscripts L, M, and
The description will be made with S removed.
【００１１】各補助シリンダ２０は、駆動油室２０ａと
補助油室２０ｂとを有し、その駆動油室２０ａと補助油
室２０ｂとを、補助電磁切換弁２１を備えた補助管路２
２ａ、２２ｂによって油圧源２３に連絡されている。そ
して、各補助シリンダ２０の補助油室２０ｂに接続され
た各補助管路２２ｂの補助電磁切換弁２１の下流側に、
型締シリンダ１の型締側油室１ａに主管路９ａを介して
連絡された連絡管路２５が、それぞれ連絡電磁切換弁２
６を介して連絡されている。前記補助シリンダ２０Ｌ
は、補助シリンダ２０Ｍと比べてストロークが同じで、
補助油室２０ｂ側の有効断面積が２倍となっており、ま
た補助シリンダ２０Ｍは、補助シリンダ２０Ｓと比べて
ストロークが２倍で、補助油室２０ｂ側の有効断面積が
同じくなっており、各補助シリンダ２０Ｌ、２０Ｍ、２
０Ｓの補助油室２０ｂの容量比は４：２：１となってい
る。Each auxiliary cylinder 20 has a drive oil chamber 20a and an auxiliary oil chamber 20b, and the drive oil chamber 20a and the auxiliary oil chamber 20b are connected to an auxiliary pipeline 2 provided with an auxiliary electromagnetic switching valve 21.
The hydraulic pressure source 23 is communicated by 2a and 22b. And, on the downstream side of the auxiliary electromagnetic switching valve 21 of each auxiliary pipeline 22b connected to the auxiliary oil chamber 20b of each auxiliary cylinder 20,
A communication line 25 connected to the mold-side oil chamber 1a of the mold-clamping cylinder 1 via the main line 9a is connected to the communication electromagnetic switching valve 2 respectively.
6. The auxiliary cylinder 20L
Has the same stroke as the auxiliary cylinder 20M,
The effective cross-sectional area on the auxiliary oil chamber 20b side is doubled, and the stroke of the auxiliary cylinder 20M is double that of the auxiliary cylinder 20S, and the effective cross-sectional area on the auxiliary oil chamber 20b side is the same. Each auxiliary cylinder 20L, 20M, 2
The capacity ratio of the auxiliary oil chamber 20b of 0S is 4: 2: 1.
【００１２】次に、上記の構成とされた射出成形機の型
締装置の作用を説明する。型開き状態において、電磁切
換弁８のソレノイドａを励磁すると、油圧源１０の作動
油は主管路９ａを通って型締シリンダ１の型締側油室１
ａに流れ、ピストンロッド１ｒを図で右に伸長移動させ
るので、トグル機構２を介して可動盤３が右に移動し、
その金型３ａを固定盤５の金型５ａに合わせるパーテイ
ング合わせが行われる。Next, the operation of the mold clamping device of the injection molding machine having the above configuration will be described. When the solenoid a of the electromagnetic switching valve 8 is excited in the mold opened state, the hydraulic oil of the hydraulic pressure source 10 passes through the main pipe line 9a and the mold-clamp-side oil chamber 1 of the mold-clamp cylinder 1
a, and the piston rod 1r is extended rightward in the figure, so that the movable platen 3 moves rightward via the toggle mechanism 2,
Parting matching is performed to match the mold 3a with the mold 5a of the fixed platen 5.
【００１３】この際、油圧源１０の作動油圧力を低い圧
力にすることで、型締力がほとんどかからない型閉状態
で可動盤３が停止する。この型閉状態で、電磁切換弁８
のソレノイドａが消磁され、金型３ａ、５ａのキャビテ
ィに射出装置１４の射出ノズルから射出スクリュの前進
移動によって溶融樹脂が射出される溶融樹脂は、キャビ
ティ内に充満された後も、その圧力による押圧力が可動
盤の型閉じ力を超えて射出が継続されるので、金型３
ａ、５ａのパーテイング面を開いた状態となる。At this time, by setting the hydraulic oil pressure of the hydraulic power source 10 to a low pressure, the movable platen 3 stops in a mold closed state where almost no mold clamping force is applied. With the mold closed, the electromagnetic switching valve 8
Is demagnetized and the molten resin is injected into the cavities of the molds 3a and 5a from the injection nozzle of the injection device 14 by the forward movement of the injection screw. Since the pressing force exceeds the closing force of the movable platen and the injection is continued, the mold 3
The partitioning surfaces a and 5a are opened.
【００１４】このようにして射出スクリュが予め設定さ
れた位置に前進するか、或いはタイマが射出開始からの
設定時間を計数し終って予め決められた圧縮量に見合っ
た量の射出樹脂がキャビティに充填されると、予め補助
油室２０ｂに作動油を満たされた１以上の補助シリンダ
２０の補助電磁切換弁２１のソレノイドａと連絡電磁切
換弁２６のソレノイドｂとが励磁される。これにより、
両電磁切換弁２１、２６のソレノイドａ、ｂをオンとさ
れた補助シリンダ２０が作動してその補助油室２０ｂの
作動油の全量を連絡管路２５を介して型締シリンダ１の
型締側油室１ａに圧送するので、ピストンロッド１ｒ
が、圧送油量を型締シリンダ１の型締油室１ａの有効断
面積で除した値に等しい距離だけ型締移動し、金型３
ａ、５ａを強力に型締めする。このように、作動補助シ
リンダ２０の補助油室２０ｂの容量に見合ってピストン
ロッド１ｒすなわちクロスヘッド２ａが正確に所定位置
に移動し、その移動位置に対応した型締力が発生され、
パーテイング面が開いていた金型３ａ、５ａが型締され
て金型キャビティ内の溶融樹脂が正確な圧縮力と圧縮量
により圧縮されるので、型締シリンダをストローク途中
において作動油の制御で停止させる場合と違って射出圧
縮成形時の圧縮力と圧縮量の制御精度が高められる。[0014] In this way, the injection screw advances to the preset position, or the timer counts the preset time from the start of injection, and the amount of the injection resin corresponding to the predetermined compression amount is filled in the cavity. When filled, the solenoid a of the auxiliary electromagnetic switching valve 21 of the one or more auxiliary cylinders 20 and the solenoid b of the communication electromagnetic switching valve 26 in which the auxiliary oil chamber 20b has been filled with hydraulic oil in advance are excited. This allows
The auxiliary cylinder 20 with the solenoids a and b of the solenoid-operated directional control valves 21 and 26 turned on operates to transfer the entire amount of hydraulic oil in the auxiliary oil chamber 20b via the communication line 25 to the mold clamping side of the mold clamping cylinder 1. Since it is pressure-fed to the oil chamber 1a, the piston rod 1r
Moves the mold by a distance equal to a value obtained by dividing the amount of pressure oil supply by the effective cross-sectional area of the mold oil chamber 1a of the mold clamping cylinder 1.
a, 5a are strongly clamped. As described above, the piston rod 1r, that is, the crosshead 2a is accurately moved to a predetermined position in accordance with the capacity of the auxiliary oil chamber 20b of the operation auxiliary cylinder 20, and a mold clamping force corresponding to the moved position is generated.
The molds 3a and 5a whose parting surfaces are open are clamped and the molten resin in the mold cavity is compressed by the accurate compression force and compression amount. Unlike the case where the compression is performed, the control accuracy of the compression force and the compression amount during the injection compression molding is improved.
【００１５】この場合、トグル機構２のクロスヘッド２
ａの位置と型締力とは、例えば、図２のような関係にあ
るので、補助油室２０ｂから型締シリンダ１の型締油室
１ａへの圧送油量によってピストンロッド１ｒと一緒に
移動するクロスヘッド２ａの移動位置が定まり、この移
動位置に対応して型締力は図２の曲線にしたがって高め
られることとなる。なお、図２でＰ１は金型３ａ、５ａ
のパーテング合せ位置であり、Ｐ２は型締シリンダ１の
ストロークエンド（型締完了）位置である。In this case, the crosshead 2 of the toggle mechanism 2
Since the position of “a” and the mold clamping force are in a relationship as shown in FIG. 2, for example, they move together with the piston rod 1r according to the amount of oil supplied from the auxiliary oil chamber 20b to the mold clamping chamber 1a of the mold clamping cylinder 1. The moving position of the crosshead 2a is determined, and the mold clamping force is increased according to the moving position according to the curve in FIG. In FIG. 2, P1 is a mold 3a, 5a
And P2 is a stroke end (mold clamping completion) position of the mold clamping cylinder 1.
【００１６】複数の補助シリンダ２０を作動させる場
合、それらを同時に作動させることも、また順を追って
作動させることもできる。図３は、時間Ｔ１で補助シリ
ンダ２０Ｍを、時間Ｔ２で補助シリンダ２０Ｌを、更に
時間Ｔ３で補助シリンダ２０Ｓを順に作動させて金型キ
ャビティ内の溶融樹脂を多段圧縮する場合の型締力の変
化例を、また図４は、時間Ｔ１で補助シリンダ２０Ｌ
を、時間Ｔ２で補助シリンダ２０Ｍを順に作動させて多
段圧縮する際の型締力の変化例を、それぞれ示す。When operating a plurality of auxiliary cylinders 20, they can be operated simultaneously or sequentially. FIG. 3 shows a change in mold clamping force when the auxiliary cylinder 20M is activated at time T1, the auxiliary cylinder 20L is activated at time T2, and the auxiliary cylinder 20S is activated at time T3 to compress the molten resin in the mold cavity in multiple stages. For example, and FIG. 4 shows the auxiliary cylinder 20L at time T1.
Shows examples of changes in the mold clamping force when the auxiliary cylinders 20M are sequentially operated at time T2 to perform multi-stage compression.
【００１７】なお、図１の実施例のように、３本の補助
シリンダ２０Ｓ、２０Ｍ、２０Ｌの容量を、前記のよう
に１：２：４のように互いに異ならせた場合、それらの
組合わせを変えることで、型締力を最大７段階に変化さ
せ、金型キャビティ内の溶融樹脂を成形条件に応じて的
確に多段圧縮することができる。When the capacities of the three auxiliary cylinders 20S, 20M, and 20L are different from each other as described above, such as 1: 2: 4, as in the embodiment of FIG. By changing the mold clamping force, the mold clamping force can be changed to a maximum of seven stages, and the molten resin in the mold cavity can be accurately compressed in multiple stages according to the molding conditions.
【００１８】図５は本発明の他の実施形態を示す。図５
の型締装置においては、型締シリンダ１のロッド側油室
１ｂに主管路９ｂを介して連絡された副連絡管路３０
が、連絡管路２５に副電磁切換弁３１を介して連絡され
ている。また主管路９ａ、９ｂには電磁切換弁３２が設
けられている。副電磁切換弁３１は中立位置で連絡管路
２５を型締シリンダ１の型締側油室１ａに連絡するとと
もに副連絡管路３０を閉じ、ソレノイドｂを励磁する
と、連絡管路２５を副連絡管路３０に連絡するとともに
連絡管路２５の型締油室１ａ側を閉じるようになってい
る。FIG. 5 shows another embodiment of the present invention. FIG.
In the mold-clamping device, the sub-connection line 30 connected to the rod-side oil chamber 1b of the mold-clamping cylinder 1 via the main line 9b.
Is connected to the communication line 25 via the auxiliary electromagnetic switching valve 31. An electromagnetic switching valve 32 is provided in the main pipelines 9a and 9b. When the auxiliary solenoid-operated directional control valve 31 connects the communication line 25 to the mold clamping side oil chamber 1a of the mold clamping cylinder 1 at the neutral position and closes the auxiliary communication line 30 and excites the solenoid b, the auxiliary communication line 25 The connection with the pipe 30 is made, and the side of the connection pipe 25 on the side of the mold clamping chamber 1a is closed.
【００１９】また電磁切換弁３２は、中立位置で主管路
９ａを油圧源１０に連絡するとともに他の主管路９ｂと
油タンク１２の連絡を断ち、またソレノイドａが励磁さ
れると、主管路９ａを油圧源１０に連絡するとともに他
の主管路９ｂを油タンク１２に連絡し、更にソレノイド
ｂが励磁されると、主管路９ａを油タンク１２に連絡す
るとともに他の主管路９ｂを油圧源１０に連絡する構造
となっている。In the neutral position, the electromagnetic switching valve 32 connects the main line 9a to the hydraulic power source 10 and disconnects the other main line 9b from the oil tank 12. When the solenoid a is excited, the main line 9a is turned off. When the solenoid b is energized, the main line 9a is connected to the oil tank 12, and the other main line 9b is connected to the oil source 12. It is structured to contact you.
【００２０】なお、他の構造は図１の射出成形機の型締
装置と同一であるので、同一の符号を付してその説明は
省略する。Since other structures are the same as those of the mold clamping device of the injection molding machine shown in FIG. 1, the same reference numerals are given and the description is omitted.
【００２１】この型締装置の場合は、電磁切換弁３２の
ソレノイドａを励磁して、前記同様に、型締力がほとん
どかからない型閉じ状態で金型３ａ、５ａのパーテング
面を合わせてキャビティに樹脂を射出し、金型３ａ、５
ａのパーテイング面が所定量開いた状態になるように金
型キャビティに溶融樹脂を充填する。そして適当な時期
にソレノイドａを消磁して電磁切換弁３２を中立にする
と共に、油圧源１０の圧力を、圧力制御弁の設定圧の変
えることにより、溶融樹脂の圧縮に必要な最大圧力以上
に高める。In the case of this mold clamping device, the solenoid a of the electromagnetic switching valve 32 is excited, and the molds 3a and 5a are aligned with the cavities by closing the molds 3a and 5a with almost no mold clamping force, as described above. Inject resin and mold 3a, 5
The mold cavity is filled with the molten resin so that the parting surface a is opened by a predetermined amount. At an appropriate time, the solenoid a is demagnetized to neutralize the electromagnetic switching valve 32, and the pressure of the hydraulic pressure source 10 is changed to a value higher than the maximum pressure required for compressing the molten resin by changing the set pressure of the pressure control valve. Enhance.
【００２２】また、上記電磁切換弁の切換えと同時に、
予め駆動油室２０ａに作動油を満たされた１以上の補助
シリンダ２０の補助電磁切換弁２１のソレノイドｂ、連
絡電磁切換弁２６のソレノイドｂ、及び副電磁切換弁３
１のソレノイドｂを同時に励磁する。これにより、型締
シリンダ１のロッド側油室１ｂが、副連絡管路３０と連
絡管路２５及び補助管路２２ｂ等によって上記補助シリ
ンダ２０の補助油室２０ｂに連通するので、型締シリン
ダ１のロッド側油室１ｂの作動油が補助シリンダ１０の
補助油室２０ｂに流れ、その補助油室２０ｂに見合う作
動油の容積を型締シリンダ１のロッド側油室１ｂの有効
断面積で除した値に等しい距離だけ型締シリンダ１のピ
ストンロッド１ｒが前進移動して図１の型締装置と同様
に射出圧縮成形時に、圧縮力と圧縮量を１ないし多段に
制御精度を高めて溶融樹脂の圧縮を行うことができる。Further, simultaneously with the switching of the electromagnetic switching valve,
The solenoid b of the auxiliary electromagnetic switching valve 21 of the one or more auxiliary cylinders 20, the solenoid b of the communication electromagnetic switching valve 26, and the auxiliary electromagnetic switching valve 3
One solenoid b is simultaneously excited. As a result, the rod-side oil chamber 1b of the mold clamping cylinder 1 communicates with the auxiliary oil chamber 20b of the auxiliary cylinder 20 through the auxiliary communication pipe 30, the communication pipe 25, the auxiliary pipe 22b, and the like. The hydraulic oil in the rod-side oil chamber 1b flows into the auxiliary oil chamber 20b of the auxiliary cylinder 10, and the volume of the hydraulic oil corresponding to the auxiliary oil chamber 20b is divided by the effective sectional area of the rod-side oil chamber 1b of the mold clamping cylinder 1. The piston rod 1r of the mold clamping cylinder 1 moves forward by a distance equal to the value, and during injection compression molding, the compression force and the amount of compression are increased by one or more stages to increase the control accuracy of the molten resin, as in the mold clamping apparatus of FIG. Compression can be performed.
【００２３】図６は本発明の別の実施形態を示す。図６
の型締装置においては、連絡管路２５を副連絡管路３０
に副電磁切換弁３１で連通させた際に型締シリンダ１の
型締側油室１ａに連通され、また連絡管路２５を型締シ
リンダ１の型締側油室１ａに連通させた場合に副連絡管
路３０に連通される副電磁切換弁３１の一つのポートに
圧力制御弁４０が接続されている。また主管路９ａ、９
ｂには電磁切換弁４２が設けられている。FIG. 6 shows another embodiment of the present invention. FIG.
In the mold clamping device, the connecting line 25 is connected to the auxiliary connecting line 30.
Is connected to the mold-clamping-side oil chamber 1a of the mold-clamping cylinder 1 when it is communicated to the mold-clamping cylinder 1 by the auxiliary solenoid-operated switching valve 31. The pressure control valve 40 is connected to one port of the sub solenoid switching valve 31 that is communicated with the sub communication line 30. Also, the main pipelines 9a, 9
b is provided with an electromagnetic switching valve 42.
【００２４】電磁切り換え弁４２は、中立位置で主管路
９ａ、９ｂと油圧源１０及び油タンク１２の連絡を断
ち、またソレノイドａが励磁されると、主管路９ａを油
圧源１０に連絡するとともに他の主管路９ｂを油タンク
１２に連絡し、更にソレノイドｂが励磁されると、主管
路９ａを油タンク１２に連絡するとともに他の主管路９
ｂを油圧源１０に連絡する構造となっている。The electromagnetic switching valve 42 disconnects the main lines 9a, 9b from the hydraulic source 10 and the oil tank 12 at the neutral position, and connects the main line 9a to the hydraulic source 10 when the solenoid a is excited. The other main line 9b is connected to the oil tank 12, and when the solenoid b is further excited, the main line 9a is connected to the oil tank 12 and the other main line 9 is connected.
b is connected to the hydraulic power source 10.
【００２５】なお、他の構造は図５の射出成形機の型締
装置と同一であるので、この場合も同一の符号を付して
その説明は省略する。Since the other structure is the same as that of the mold clamping device of the injection molding machine shown in FIG. 5, the same reference numerals are given in this case and the description is omitted.
【００２６】図６の型締装置の場合は、まず電磁切換弁
４２のソレノイドａを励磁し、所定の型締力で金型３
ａ、５ａのパーテング面を合わせて電磁切換弁４２を中
立にする。次いで、予め補助油室２０ｂに作動油を満た
された１以上の補助シリンダ２０の補助電磁切換弁２１
のソレノイドａと連絡電磁切換弁２６のソレノイドｂ及
び副電磁切換弁３１のソレノイドｂを励磁する。この操
作で、選ばれた補助シリンダ２０が作動して補助油室２
０ｂの作動油を型締シリンダ１のロッド側油室１ｂに圧
送するので、ピストンロッド１ｒが圧力制御弁４０で設
定された圧力の背圧を受けながら縮小移動して作動補助
シリンダ２０の補助油室２０ｂの容積に見合う分だけ可
動盤３を型開き移動させるので、金型３ａ、５ａがそれ
らのパーテイング面を所定距離開いた正確な位置に停止
する。In the case of the mold clamping device shown in FIG. 6, first, the solenoid a of the electromagnetic switching valve 42 is excited, and the mold 3 is pressed with a predetermined clamping force.
The electromagnetic switching valve 42 is made neutral by aligning the parting surfaces a and 5a. Next, the auxiliary electromagnetic switching valve 21 of one or more auxiliary cylinders 20 in which the auxiliary oil chamber 20b has been filled with hydraulic oil in advance.
And the solenoid b of the communication electromagnetic switching valve 26 and the solenoid b of the auxiliary electromagnetic switching valve 31 are excited. With this operation, the selected auxiliary cylinder 20 is operated and the auxiliary oil chamber 2
0b is supplied to the rod-side oil chamber 1b of the mold clamping cylinder 1 by pressure, so that the piston rod 1r is reduced while receiving the back pressure of the pressure set by the pressure control valve 40, and the auxiliary oil of the operation auxiliary cylinder 20 is reduced. Since the movable platen 3 is opened by a distance corresponding to the volume of the chamber 20b, the dies 3a and 5a stop at their correct positions with their parting surfaces opened a predetermined distance.
【００２７】その後、上記のようにして所定の圧縮量を
見込んだ容積の金型３ａ、５ａのキャビティに樹脂を射
出し、図１又は図５の型締装置の要領で１ないし多段階
の射出圧縮成形を行う。Thereafter, the resin is injected into the cavities of the dies 3a, 5a having a predetermined amount of compression in consideration of the predetermined amount of compression as described above, and the resin is injected in one or multiple stages in the manner of the mold clamping device shown in FIG. 1 or FIG. Perform compression molding.
【００２８】この型締装置によれば、射出樹脂の圧力に
より型開きするものと異なり、補助シリンダ２０によ
り、樹脂射出時における金型３ａ、５ａの型開き状態を
精度よく位置決め調整することができるので、射出圧縮
成形条件に幅広く対処することができる。According to this mold clamping device, unlike the device which opens the mold by the pressure of the injection resin, the auxiliary cylinder 20 can accurately adjust the position of the molds 3a and 5a when the resin is injected. Therefore, it is possible to cope with injection compression molding conditions widely.
【００２９】図７は本発明の更に他の実施形態を示す。
図７の型締装置にあっては、補助シリンダ２０のボトム
側に、調整ねじ５０を駆動油室２０ａ内に突出自在に螺
着して成る。調整ねじ５０は、補助シリンダ２０のピス
トン２０ｐの停止位置を変えて補助油室２０ｂの容量を
調整するものであり、規制手段を構成している。FIG. 7 shows still another embodiment of the present invention.
In the mold clamping device of FIG. 7, an adjusting screw 50 is screwed to the bottom side of the auxiliary cylinder 20 so as to protrude into the driving oil chamber 20a. The adjusting screw 50 adjusts the capacity of the auxiliary oil chamber 20b by changing the stop position of the piston 20p of the auxiliary cylinder 20, and constitutes a regulating means.
【００３０】したがって、この型締装置の場合は、調整
ねじ５０でピストン２０ｐの停止位置を変えることによ
り、補助油室２０ｂの容積を微調整して型締シリンダ１
の圧縮ストロークを成形製品や金型等に正しく適合させ
ることができる。Therefore, in the case of this mold clamping device, the volume of the auxiliary oil chamber 20b is finely adjusted by changing the stop position of the piston 20p with the adjusting screw 50, so that the mold clamping cylinder 1
Compression stroke can be properly adapted to a molded product, a mold, or the like.
【００３１】なお、他の構造は図１の型締装置と同一で
あるので、同一の符号を付してその説明は省略する。Since the other structure is the same as that of the mold clamping device of FIG. 1, the same reference numerals are given and the description is omitted.
【００３２】調整ねじ５０は、すべての補助シリンダ２
０に設ける必要はなく、一部の補助シリンダ２０だけに
設けてもよく、また、補助油室２０ｂ、或いは駆動油室
２０ａと補助油室２０ｂの両方に設けることができる。
更に、調整ねじ５０は、図５又は図６の型締装置の補助
シリンダ２０にも設けることができる。The adjusting screw 50 is connected to all the auxiliary cylinders 2.
It is not necessary to be provided at 0, and it may be provided at only some of the auxiliary cylinders 20, or may be provided at the auxiliary oil chamber 20b or both the driving oil chamber 20a and the auxiliary oil chamber 20b.
Further, the adjusting screw 50 can also be provided on the auxiliary cylinder 20 of the mold clamping device of FIG. 5 or FIG.
【００３３】図１、図５、図６及び図７の補助シリンダ
２０は、いずれもピストンロッドを持つが、これを省く
ことができる。またピストンロッド側を駆動油室として
もよい。補助シリンダ２０の数は３本とは限らず、１本
以上ならば何本でも設けることができる。補助シリンダ
２０を複数設ける場合、その容積は、一部又は全部が同
一でも、或いは異なっていてもよい。Each of the auxiliary cylinders 20 shown in FIGS. 1, 5, 6, and 7 has a piston rod, but this can be omitted. The piston rod side may be used as the drive oil chamber. The number of auxiliary cylinders 20 is not limited to three, and any number of one or more auxiliary cylinders can be provided. When a plurality of auxiliary cylinders 20 are provided, the volumes thereof may be partially or entirely the same or different.
【００３４】また、図の型締装置は、いずれも型締シリ
ンダ１で可動盤３をトグル機構２を介して動かすトグル
式となっているが、型締シリンダ１で可動盤３を直接動
かす直圧式の型締装置にも実施できることは言うまでも
ない。油圧源１０、２３には、従来同様に油圧ポンプや
アキュムレータ等が用いられるが、この油圧源１０、２
３を一つに纏めることができる。油圧回路には、リリー
フ弁等の油圧機器が必要に応じて設けられることは従来
と同じである。The mold clamping apparatus shown in the figures is of a toggle type in which the movable platen 3 is moved by the mold clamping cylinder 1 via the toggle mechanism 2, but the movable platen 3 is directly moved by the mold clamping cylinder 1. It goes without saying that the present invention can be applied to a pressure type mold clamping device. As the hydraulic sources 10, 23, a hydraulic pump, an accumulator, or the like is used as in the related art.
3 can be put together. The hydraulic circuit is provided with a hydraulic device such as a relief valve as necessary, as in the related art.
【００３５】[0035]
【発明の効果】以上説明したように、本発明に係る射出
成形機の型締装置は、電磁切換弁を備えた主管路によっ
て型締側油室とロッド側油室とに油圧源が連絡された型
締シリンダで可動盤を動かして該可動盤と固定盤との間
で金型を型締めする射出成形機の型締装置において、補
助シリンダが、補助電磁切換弁を備えた補助管路によっ
て駆動油室と補助油室とを油圧源に連絡して設けられ、
上記補助シリンダの補助油室に連絡された補助管路の補
助電磁切換弁の下流側に、上記型締シリンダの型締側油
室に連絡された連絡管路が、連絡電磁切換弁を介して連
絡された構成とされているので、射出圧縮成形を成形条
件に対応して精度よく行うことができる。また油圧回路
の構成が単純である上、制御が簡単なので、既存の型締
装置に実施することが容易であり、従来のように油圧回
路にサーボ弁を使用しないので、作動油の管理、運転調
整が容易である等の効果を奏する。As described above, in the mold clamping device of the injection molding machine according to the present invention, the hydraulic source is connected to the mold clamping side oil chamber and the rod side oil chamber by the main pipeline having the electromagnetic switching valve. In a mold clamping device of an injection molding machine for clamping a mold between a movable platen and a fixed platen by moving a movable platen with a mold clamping cylinder, an auxiliary cylinder is provided by an auxiliary conduit having an auxiliary electromagnetic switching valve. A drive oil chamber and an auxiliary oil chamber are provided in communication with a hydraulic pressure source,
Downstream of the auxiliary electromagnetic switching valve of the auxiliary line connected to the auxiliary oil chamber of the auxiliary cylinder, a communication line connected to the mold-side oil chamber of the mold clamping cylinder is connected via a communication electromagnetic switching valve. Since the configuration is informed, the injection compression molding can be performed accurately in accordance with the molding conditions. In addition, the structure of the hydraulic circuit is simple and the control is simple, so it is easy to implement it in the existing mold clamping device. It has effects such as easy adjustment.
【００３６】型締シリンダのロッド側油室に連絡された
副連絡管路を、連絡管路に副電磁切換弁を介して連絡し
た構成とした場合も上記と同一の効果がある。The same effect as described above can be obtained when the auxiliary communication line connected to the rod-side oil chamber of the mold clamping cylinder is connected to the communication line via an auxiliary electromagnetic switching valve.
【００３７】複数の補助シリンダを互いに並列に設けた
場合は、最適な圧縮度を選択することができ、また圧縮
段数を多段にすることができる。したがって射出圧縮成
形条件に幅広く対応することが可能となり、より良好な
製品を得ることができる。When a plurality of auxiliary cylinders are provided in parallel with each other, an optimum degree of compression can be selected, and the number of compression stages can be increased. Therefore, it is possible to widely support injection compression molding conditions, and it is possible to obtain a better product.
【００３８】連絡管路を副連絡管路に副電磁切換弁で連
通させた際に型締シリンダの型締側油室に連通される副
電磁切換弁のポートに圧力制御弁を接続した構成とする
と、金型を、パーテング位置から精密に微小量開いた状
態で停止させることが可能となり、射出圧縮成形条件に
より一層幅広く対応することができる。A pressure control valve is connected to a port of the auxiliary electromagnetic switching valve which is communicated with the mold clamping side oil chamber of the mold closing cylinder when the connecting conduit is communicated with the auxiliary communication switching line by the auxiliary electromagnetic switching valve. Then, it becomes possible to stop the mold in a state where it is opened from the parting position precisely by a minute amount, and it is possible to more widely cope with injection compression molding conditions.
【００３９】１以上の補助シリンダに、該補助シリンダ
のストロークを規制する規制手段を設けると、補助シリ
ンダの容積を変えて型締シリンダの圧縮ストロークを微
調整することができるようになり、圧縮ストロークを成
形製品等に適合させて良好な射出圧縮成形を行うことが
でき、しかも補助シリンダの設備数を減らしてコストを
低くすることができる。If at least one auxiliary cylinder is provided with a restricting means for restricting the stroke of the auxiliary cylinder, the compression stroke of the mold clamping cylinder can be finely adjusted by changing the volume of the auxiliary cylinder. Can be applied to a molded product to perform good injection compression molding, and the number of auxiliary cylinders can be reduced to reduce costs.
【図１】 本発明に係る射出成形機の型締装置の一実施
例を示す図である。FIG. 1 is a view showing one embodiment of a mold clamping device of an injection molding machine according to the present invention.
【図２】 トグル機構のクロスヘッドの位置と型締力の
関係の一例を示す図である。FIG. 2 is a diagram illustrating an example of a relationship between a position of a crosshead of a toggle mechanism and a mold clamping force.
【図３】 ３本の補助シリンダの作動順と型締力の関係
の一例を示す図である。FIG. 3 is a diagram illustrating an example of a relationship between an operation order of three auxiliary cylinders and a mold clamping force.
【図４】 ２本の補助シリンダの作動順と型締力の関係
の一例を示す図である。FIG. 4 is a diagram illustrating an example of a relationship between an operation order of two auxiliary cylinders and a mold clamping force.
【図５】 本発明に係る射出成形機の型締装置の他の実
施例を示す図である。FIG. 5 is a view showing another embodiment of the mold clamping device of the injection molding machine according to the present invention.
【図６】 本発明に係る射出成形機の型締装置の別の実
施例を示す図である。FIG. 6 is a view showing another embodiment of the mold clamping device of the injection molding machine according to the present invention.
【図７】 本発明に係る射出成形機の型締装置の更に別
の実施例を示す図である。FIG. 7 is a view showing still another embodiment of the mold clamping device of the injection molding machine according to the present invention.
１ 型締シリンダ １ａ 型締側油室 １ｂ ロッド側油室 １ｒ ピストンロッド ２ トグル機構 ２ａ クロスヘッド ３ 可動盤 ３ａ 金型 ５ 固定盤 ５ａ 金型 ８、３２、４２ 電磁切換弁 ９ａ、９ｂ 主管路 １０ 油圧源 ２０ 補助シリンダ ２０ａ 駆動装置 ２０ｂ 補助油室 ２１ 補助電磁切換弁 ２２ａ、２２ｂ 補助管路 ２３ 油圧源 ２５ 連絡管路 ２６ 連絡電磁切換弁 ３０ 副連絡管路 ３１ 副電磁切換弁 ４０ 圧力制御弁 ５０ 調整ねじ（規制手段） REFERENCE SIGNS LIST 1 mold clamping cylinder 1a mold clamping side oil chamber 1b rod side oil chamber 1r piston rod 2 toggle mechanism 2a crosshead 3 movable plate 3a mold 5 fixed plate 5a mold 8, 32, 42 electromagnetic switching valve 9a, 9b main pipeline 10 Hydraulic source 20 Auxiliary cylinder 20a Driving device 20b Auxiliary oil chamber 21 Auxiliary electromagnetic switching valve 22a, 22b Auxiliary line 23 Hydraulic source 25 Communication line 26 Communication electromagnetic switching valve 30 Secondary communication line 31 Secondary electromagnetic switching valve 40 Pressure control valve 50 Adjustment screw (control means)
Claims (5)
側油室とロッド側油室とに油圧源が連絡された型締シリ
ンダで可動盤を動かして該可動盤と固定盤との間で金型
を型締めする射出成形機の型締装置において、 補助シリンダが、補助電磁切換弁を備えた補助管路によ
って駆動油室と補助油室とを油圧源に連絡して設けら
れ、 上記補助シリンダの補助油室に連絡された補助管路の補
助電磁切換弁の下流側に、上記型締シリンダの型締側油
室に連絡された連絡管路が、連絡電磁切換弁を介して連
絡されたことを特徴とする射出成形機の型締装置。1. A movable platen is moved by a mold clamping cylinder in which a hydraulic pressure source is connected to a mold-side oil chamber and a rod-side oil chamber by a main conduit provided with an electromagnetic switching valve, and the movable platen is moved between the movable platen and the fixed platen. In the mold clamping device for an injection molding machine, the auxiliary cylinder is provided by connecting the driving oil chamber and the auxiliary oil chamber to a hydraulic source by an auxiliary pipe having an auxiliary electromagnetic switching valve. Downstream of the auxiliary electromagnetic switching valve of the auxiliary line connected to the auxiliary oil chamber of the auxiliary cylinder, a communication line connected to the mold-side oil chamber of the mold clamping cylinder is connected via a communication electromagnetic switching valve. A mold clamping device for an injection molding machine.
られたことを特徴とする請求項１記載の射出成形機の型
締装置。2. The mold clamping device for an injection molding machine according to claim 1, wherein a plurality of auxiliary cylinders are provided in parallel with each other.
た副連絡管路が、連絡管路に副電磁切換弁を介して連絡
されたことを特徴とする請求項１又は２記載の射出成形
機の型締装置。3. The injection according to claim 1, wherein the auxiliary communication line connected to the rod-side oil chamber of the mold clamping cylinder is connected to the communication line via an auxiliary electromagnetic switching valve. Mold clamping device for molding machines.
連通させた際に型締シリンダの型締側油室に連通される
副電磁切換弁のポートに圧力制御弁が接続されたことを
特徴とする請求項３記載の射出成形機の型締装置。4. A pressure control valve is connected to a port of the sub-electromagnetic switching valve which is communicated with the mold-side oil chamber of the mold-clamping cylinder when the communication pipe is connected to the sub-communication pipe by the sub-electromagnetic switching valve. The mold clamping device for an injection molding machine according to claim 3, wherein:
ダのストロークを規制する規制手段が設けられたことを
特徴とする請求項１、２、３又は４記載の射出成形機の
型締装置。5. The mold clamping device for an injection molding machine according to claim 1, wherein at least one auxiliary cylinder is provided with a restricting means for restricting a stroke of the auxiliary cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32895596A JP3149803B2 (en) | 1996-12-09 | 1996-12-09 | Mold clamping device of injection molding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32895596A JP3149803B2 (en) | 1996-12-09 | 1996-12-09 | Mold clamping device of injection molding machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10166407A true JPH10166407A (en) | 1998-06-23 |
| JP3149803B2 JP3149803B2 (en) | 2001-03-26 |
Family
ID=18215985
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32895596A Expired - Fee Related JP3149803B2 (en) | 1996-12-09 | 1996-12-09 | Mold clamping device of injection molding machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3149803B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008030075A (en) * | 2006-07-27 | 2008-02-14 | Ube Machinery Corporation Ltd | Clamping apparatus |
| JP2013014117A (en) * | 2011-07-06 | 2013-01-24 | Toyota Industries Corp | Injection apparatus |
-
1996
- 1996-12-09 JP JP32895596A patent/JP3149803B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008030075A (en) * | 2006-07-27 | 2008-02-14 | Ube Machinery Corporation Ltd | Clamping apparatus |
| JP2013014117A (en) * | 2011-07-06 | 2013-01-24 | Toyota Industries Corp | Injection apparatus |
| US9266269B2 (en) | 2011-07-06 | 2016-02-23 | Kabushiki Kaisha Toyota Jidoshokki | Injection apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3149803B2 (en) | 2001-03-26 |
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