JP3284099B2 - Control method of mold clamping device - Google Patents
Control method of mold clamping deviceInfo
- Publication number
- JP3284099B2 JP3284099B2 JP11269998A JP11269998A JP3284099B2 JP 3284099 B2 JP3284099 B2 JP 3284099B2 JP 11269998 A JP11269998 A JP 11269998A JP 11269998 A JP11269998 A JP 11269998A JP 3284099 B2 JP3284099 B2 JP 3284099B2
- Authority
- JP
- Japan
- Prior art keywords
- mold clamping
- mold
- cavity
- movable
- controlling
- 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
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
- B29C45/56—Means for plasticising or homogenising the moulding material or forcing it into the mould using mould parts movable during or after injection, e.g. injection-compression moulding
- B29C45/561—Injection-compression moulding
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Description
【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION
【０００１】[0001]
【発明の属する技術分野】本発明は、僅かに開いた金型
に溶融樹脂を充填後該金型に型締力を与えて溶融樹脂を
圧延し、展延する射出圧縮成形を高精度、低コストで実
施する型締装置とその制御方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to injection compression molding in which a slightly opened mold is filled with a molten resin, a mold clamping force is applied to the mold, and the molten resin is rolled and spread. The present invention relates to a mold clamping device implemented at a low cost and a control method thereof.
【０００２】[0002]
【従来の技術】前記射出圧縮成形に係る先行技術は、特
開平５−２６９７４９、特開平５−２６９７５０、特開
平５−２６９７５１、特開平５−２８５９５６、特開平
６−２７０２２０および特開平６−３０４９８４に開示
され、それら先行技術における型締装置は、複数のタイ
バーと、可動盤を前記タイバーに係止する係止装置と、
タイバー各軸に設けた型締シリンダと、該型締シリンダ
を制御するサーボ弁からなる。2. Description of the Related Art The prior art relating to the injection compression molding is disclosed in JP-A-5-269949, JP-A-5-269750, JP-A-5-269975, JP-A-5-285596, JP-A-6-270220 and JP-A-6-304984. Are disclosed in the prior art, a plurality of tie bars, a locking device for locking the movable platen to the tie bar,
It comprises a mold clamping cylinder provided on each shaft of the tie bar, and a servo valve for controlling the mold clamping cylinder.
【０００３】[0003]
【発明が解決しようとする課題】前記先行技術における
型締装置は、タイバー各軸に設けた四の型締シリンダに
より必要な型締力を得るため、その型締シリンダは大型
にならざるを得なかった。また型締シリンダの制御を行
うサーボ弁等の油圧機器も大型の型締シリンダに応じた
定格流量を有するものを採用する必要があるため、コス
ト高となる。一方、制御性から見ると大型の型締シリン
ダを位置決め制御するため応答性能が悪化するという問
題がある。In the prior art mold clamping apparatus, the required clamping force is obtained by four clamping cylinders provided on each shaft of the tie bar, so that the clamping cylinder must be large. Did not. Also, hydraulic equipment such as a servo valve for controlling the mold clamping cylinder needs to employ a hydraulic fluid having a rated flow rate corresponding to a large mold clamping cylinder, which increases costs. On the other hand, from the viewpoint of controllability, there is a problem that the response performance deteriorates due to the positioning control of the large mold clamping cylinder.
【０００４】[0004]
【課題を解決するための手段】そこで、本発明は前記開
閉駆動部を固定盤と可動盤の外周部に三以上設け、それ
ぞれの開閉駆動部を単独に位置決め制御可能になした型
締装置を提案したのである。SUMMARY OF THE INVENTION Accordingly, the present invention provides a mold clamping device in which three or more opening / closing drive units are provided on the outer periphery of a fixed plate and a movable plate, and each opening / closing drive unit can be controlled independently. It was suggested.
【０００５】[0005]
【発明の実施の形態】図１は本発明の型締装置１６を示
す部分断面図であり、図１により本発明の実施の形態を
詳細に説明する。１は固定金型７を取り付けた固定盤で
あり、該固定金型７に型合わせされ近接離間する可動金
型８を取り付けた可動盤２と対向する。可動盤２の背面
には型締シリンダ４に嵌挿された型締ラム３が固着され
ている。型締シリンダ４には圧油が供給され型締ラム３
に作用して型締力が発生する。タイバー５は型締シリン
ダ４の鍔部と固定盤１の間に可動盤２を摺動自在に貫通
して張設され、型締力に対抗するようにしている。型締
シリンダ４と型締ラム３とで構成される型締部１５は油
圧による構成で説明したが、電動サーボモータとボール
ネジ等を使用した構成でもよいことは言うまでもない。FIG. 1 is a partial sectional view showing a mold clamping device 16 of the present invention, and an embodiment of the present invention will be described in detail with reference to FIG. Reference numeral 1 denotes a fixed plate to which a fixed mold 7 is attached, and is opposed to the movable plate 2 to which a movable mold 8 which is fitted to the fixed mold 7 and which is close to and separated from the fixed mold 7 is attached. A mold clamping ram 3 fitted into a mold clamping cylinder 4 is fixed to the rear surface of the movable platen 2. Pressure oil is supplied to the mold clamping cylinder 4 and the mold clamping ram 3
And a mold clamping force is generated. The tie bar 5 is slidably penetrated through the movable plate 2 between the flange portion of the mold clamping cylinder 4 and the fixed plate 1 so as to oppose the mold clamping force. Although the mold clamping unit 15 composed of the mold clamping cylinder 4 and the mold clamping ram 3 has been described as a configuration using hydraulic pressure, it is needless to say that a configuration using an electric servomotor and a ball screw may be used.
【０００６】サイドシリンダ９は、そのシリンダとロッ
ドを固定盤１と可動盤２の外周部にそれぞれ取り付け、
可動盤２を固定盤１に対し近接離間せしめる開閉駆動部
であり、本発明を実施しない従来の型締装置では対角に
二設けていた。本発明では少なくとも三以上、好ましく
は四設ける。サイドシリンダ９と同数、同位置に固定盤
１と可動盤２の距離と速度を測定・検出する位置速度検
出器１０を取り付ける。サイドシリンダ９の前進、後退
の両部屋にはサーボ弁１１からの管路が接続され、サー
ボ弁１１の圧力ポートには油圧源１２から、ドレンポー
トにはタンク１３からの管路がそれぞれ接続されてい
る。The side cylinder 9 has its cylinder and rod attached to the outer periphery of the fixed board 1 and the movable board 2, respectively.
It is an opening / closing drive unit for moving the movable platen 2 toward and away from the fixed platen 1, and two diagonal members are provided in a conventional mold clamping device not implementing the present invention. In the present invention, at least three or more, preferably four are provided. A position / speed detector 10 for measuring and detecting the distance and speed between the fixed platen 1 and the movable platen 2 is attached at the same number and position as the side cylinders 9. The pipeline from the servo valve 11 is connected to both the forward and backward chambers of the side cylinder 9, the hydraulic port 12 is connected to the pressure port of the servo valve 11, and the pipeline from the tank 13 is connected to the drain port. ing.
【０００７】本発明に係る型締装置の作動を説明する。
型開きして前成形サイクルにおける成形品を可動金型８
から取り出した後、位置速度検出器１０で各軸の速度が
同一となるようにサーボ弁１１を制御して型閉めする。
可動金型８が固定金型７に型合わせ当接する所定距離手
前（Ｄ＝３０ｍｍ以内）位置に到達したとき可動盤２は
型閉めを停止し、可動金型８と固定金型７により形成さ
れるキャビティが所定の厚さ分布となるように位置速度
検出器１０の各信号をフィードバック信号とする閉ルー
プ制御を四のサーボ弁１１により実行して位置決め保持
する。次に、射出装置６のノズルを固定金型７に押圧し
て前記キャビティ内に溶融樹脂１４を射出充填する。こ
のとき、キャビティは距離Ｄだけ厚くなっており、しか
も厚くなったキャビティを充満しない量の溶融樹脂１４
を充填するので、その流動抵抗に基づく樹脂圧力は極め
て低く、定格の型締力の１０％程度しかないサイドシリ
ンダ９の全出力でも十分その停止位置を保持出来るので
ある。また、この開閉駆動部は油圧式であるサイドシリ
ンダ９で説明したが、サーボモータとボールネジ等によ
る電気式で構成することも可能である。The operation of the mold clamping device according to the present invention will be described.
Open the mold and move the molded product in the previous molding cycle
Then, the servo valve 11 is controlled by the position / speed detector 10 so that the speed of each axis becomes the same, and the mold is closed.
When the movable mold 8 reaches a position a predetermined distance (D = 30 mm or less) before the movable mold 8 comes into contact with the fixed mold 7, the movable platen 2 stops closing the mold, and is formed by the movable mold 8 and the fixed mold 7. The four servo valves 11 execute closed loop control using each signal of the position / velocity detector 10 as a feedback signal so that the cavity having a predetermined thickness distribution has a predetermined thickness distribution. Next, the nozzle of the injection device 6 is pressed against the fixed mold 7 to inject and fill the molten resin 14 into the cavity. At this time, the cavity is thickened by the distance D, and an amount of the molten resin 14 not filling the thickened cavity.
, The resin pressure based on the flow resistance is extremely low, and the stop position can be sufficiently maintained even with the full output of the side cylinder 9 which is only about 10% of the rated mold clamping force. Further, the opening / closing drive unit has been described as the hydraulic side cylinder 9, but it may be configured as an electric type using a servomotor and a ball screw.
【０００８】射出充填途中もしくは充填が終了したとき
サーボ弁１１を制御して、可動盤２を前記停止位置での
傾きを維持して固定盤側に平行移動せしめる。このと
き、型締シリンダ４にも圧油を供給して、型締部１５の
型締力も溶融樹脂１４に作用させて溶融樹脂１４を圧
延、展延し、可動盤２が距離Ｄもしくは距離Ｄよりも僅
か少ない距離移動し、狭くなったキャビティに溶融樹脂
１４が充満するのである。During the injection filling or when the filling is completed, the servo valve 11 is controlled to move the movable platen 2 toward the fixed platen while maintaining the inclination at the stop position. At this time, pressurized oil is also supplied to the mold clamping cylinder 4, and the mold clamping force of the mold clamping unit 15 is also applied to the molten resin 14 to roll and spread the molten resin 14. It moves a little less distance than that, and the molten resin 14 fills the narrowed cavity.
【０００９】[0009]
【発明の効果】本発明によれば、キャビティの圧縮を平
行移動して行う射出圧縮成形を従来の成形機よりも低コ
ストで実現出来る。すなわち射出圧縮成形を実施出来な
い通常の射出成形機にサイドシリンダとサーボ弁の追加
等を行うのみで射出圧縮成形が高精度に実施可能とな
る。According to the present invention, the injection compression molding in which the cavity is compressed by moving it in parallel can be realized at lower cost than the conventional molding machine. That is, injection compression molding can be performed with high accuracy only by adding a side cylinder and a servo valve to a normal injection molding machine in which injection compression molding cannot be performed.
【図１】本発明を実施する射出成形機の型締装置を示す
部分断面図である。FIG. 1 is a partial sectional view showing a mold clamping device of an injection molding machine embodying the present invention.
１ ‥‥‥ 固定盤 ２ ‥‥‥ 可動盤 ３ ‥‥‥ 型締ラム ４ ‥‥‥ 型締シリンダ ５ ‥‥‥ タイバ− ６ ‥‥‥ 射出装置 ７ ‥‥‥ 固定金型 ８ ‥‥‥ 可動金型 ９ ‥‥‥ サイドシリンダ（開閉駆動部） １０ ‥‥ 位置速度検出器 １１ ‥‥ サーボ弁 １２ ‥‥ 油圧源 １３ ‥‥ タンク １４ ‥‥ 溶融樹脂 １５ ‥‥ 型締部 １６ ‥‥ 型締装置 1 ‥‥‥ Fixed plate 2 ‥‥‥ Movable plate 3 ‥‥‥ Mold clamping ram 4 ‥‥‥ Mold clamping cylinder 5 ‥‥‥ Tie bar 6 ‥‥‥ Injection device 7 固定 Fixed mold 8 可 動 Movable Mold 9 ‥‥‥ Side cylinder (opening / closing drive) 10 位置 Position / speed detector 11 サ ー ボ Servo valve 12 油 圧 Hydraulic power source 13 タ ン ク Tank 14 溶 融 Molten resin 15 ‥‥ Mold clamp 16 ‥‥ Mold clamp apparatus
Claims (1)
と可動盤の外周部に三以上設けた開閉駆動部と、固定盤
と可動盤に取り付けた金型を圧締する型締部と、それぞ
れの開閉駆動部を単独に位置決め制御可能な位置制御手
段とを備えた型締装置の制御方法において、 前記開閉駆動部を位置決め制御することによって、可動
盤を所定位置に停止保持せしめキャビティが所定厚さ分
布となるようにし、射出装置から厚くなったキャビティ
内へキャビティを充満しない量の溶融樹脂を充填し、充
填途中もしくは充填後開閉駆動部を制御して、可動盤を
前記所定位置からキャビティを圧縮すべく平行移動せし
めると共に、型締部を駆動して溶融樹脂を展延すること
を特徴とする型締装置の制御方法。1. A fixed plate having a movable plate close to and separated from a fixed plate.
A closing drive unit provided more than three on the outer periphery of the movable platen and a mold clamping unit for clamping a mold attached to the stationary platen and the movable platen, it
Position control hand that can control the positioning of these open / close drive units independently
In the method for controlling a mold clamping device having a step, by controlling the positioning of the opening / closing drive unit, the movable plate is stopped and held at a predetermined position so that the cavity has a predetermined thickness distribution, and the thickness is increased from the injection device. cavity
Filling the inside with the amount of molten resin that does not fill the cavity, controlling the opening / closing drive unit during or after filling, moving the movable platen from the predetermined position to compress the cavity, and driving the mold clamping unit. A method for controlling a mold clamping device, comprising spreading a molten resin by heating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11269998A JP3284099B2 (en) | 1998-04-07 | 1998-04-07 | Control method of mold clamping device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11269998A JP3284099B2 (en) | 1998-04-07 | 1998-04-07 | Control method of mold clamping device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11291309A JPH11291309A (en) | 1999-10-26 |
| JP3284099B2 true JP3284099B2 (en) | 2002-05-20 |
Family
ID=14593293
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11269998A Expired - Fee Related JP3284099B2 (en) | 1998-04-07 | 1998-04-07 | Control method of mold clamping device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3284099B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2430643A (en) * | 2005-10-03 | 2007-04-04 | Im Pak Technologies Ltd | Injection impact compression moulding |
| AT515939B1 (en) * | 2014-10-24 | 2016-01-15 | Engel Austria Gmbh | Mold clamping unit and method of operating the same |
-
1998
- 1998-04-07 JP JP11269998A patent/JP3284099B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH11291309A (en) | 1999-10-26 |
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