JPH0653379B2 - Injection compression molding method and apparatus - Google Patents
Injection compression molding method and apparatusInfo
- Publication number
- JPH0653379B2 JPH0653379B2 JP61155957A JP15595786A JPH0653379B2 JP H0653379 B2 JPH0653379 B2 JP H0653379B2 JP 61155957 A JP61155957 A JP 61155957A JP 15595786 A JP15595786 A JP 15595786A JP H0653379 B2 JPH0653379 B2 JP H0653379B2
- Authority
- JP
- Japan
- Prior art keywords
- mold
- injection
- filling
- pressure
- screw
- 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
- B29C45/76—Measuring, controlling or regulating
-
- 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】 （産業上の利用分野） 本発明は、射出成形機に適用される射出圧縮成形方法及
びその装置に関するものである。TECHNICAL FIELD The present invention relates to an injection compression molding method applied to an injection molding machine and an apparatus thereof.
（従来の技術） 金型の型締装置が油圧シリンダで構成される射出成形機
による従来の射出圧縮成形では、最初、型締圧力を低圧
に設定して金型接合面を閉じておき、その状態で射出を
開始する。(Prior Art) In conventional injection compression molding by an injection molding machine in which a mold clamping device is composed of a hydraulic cylinder, first, the mold clamping pressure is set to a low pressure and the mold joint surface is closed, The injection is started in the state.
金型キャビティ内に充填される樹脂圧力により前記接合
面が型開きしてガス抜けを促進させることによって、低
い射出圧力での充填を可能とする。The bonding surface is opened by the resin pressure filled in the mold cavity to promote gas release, and thus filling at a low injection pressure is possible.
次に、射出開始と同時に作動するタイマーのタイムアウ
ト後、型締圧力を高圧として前記型開き状態の金型をそ
の接合面が閉じるまで圧縮し、金型キャビティ内の溶融
樹脂を加圧して溶融樹脂の冷却に伴なう収縮を補償しよ
うとするものである。Next, after the timer that operates at the same time as the start of injection times out, the mold clamping pressure is set to a high pressure to compress the mold in the mold open state until the joint surface is closed, and the molten resin in the mold cavity is pressed to melt the molten resin. This is intended to compensate for the shrinkage associated with the cooling of the.
これを図面に基づいて詳しく説明する。This will be described in detail with reference to the drawings.
第５図は従来の射出圧縮装置の概略を示すシステム図で
ある。金型１はスプルー２、キャビティ３、ゲート４及
びキャビティ３とゲート４との通路を閉塞するゲートシ
リンダ１９とから構成されている。FIG. 5 is a system diagram showing an outline of a conventional injection compression device. The mold 1 includes a sprue 2, a cavity 3, a gate 4, and a gate cylinder 19 that closes a passage between the cavity 3 and the gate 4.
金型１は接合面５により可動側と固定側に分けられてお
り、その可動側は可動盤６に固定され、固定側は固定盤
７に固定されている。可動盤６は型締シリンダ８に嵌合
し摺動する型締ラム９に締結固定されている。従って、
型締ラム９の動きにより接合面５を境として可動側が動
き、図の左右方向に金型開閉がなされる構造になってい
る。The mold 1 is divided into a movable side and a fixed side by a joining surface 5, the movable side is fixed to a movable platen 6, and the fixed side is fixed to a fixed platen 7. The movable plate 6 is fastened and fixed to a mold clamping ram 9 which is fitted into a mold clamping cylinder 8 and slides. Therefore,
The movable side moves with the joint surface 5 as a boundary by the movement of the mold clamping ram 9, and the mold is opened and closed in the left-right direction in the drawing.
まず、射出開始前には方向切換弁１０のソレノイドａが
励磁され、ポンプ１１の油量が型締シリンダ８の図示左
方に供給されて型締ラム９が右方へ移動し、金型１を比
例電磁圧力弁１２で設定された低圧力で型締する。次に
シーケンサ１３からの指令により射出シリンダ１７へ圧
油が供給され、スクリュ１６と結合された射出ラム１８
が図示左方へ移動する。これにより予めスクリュシリン
ダ１４の中で加熱溶融された樹脂がノズル１５を経て金
型１に射出される。First, before the injection is started, the solenoid a of the direction switching valve 10 is excited, the oil amount of the pump 11 is supplied to the left side of the mold clamping cylinder 8 in the drawing, and the mold clamping ram 9 moves to the right side, so that the mold 1 Is clamped at the low pressure set by the proportional electromagnetic pressure valve 12. Next, pressure oil is supplied to the injection cylinder 17 according to a command from the sequencer 13, and the injection ram 18 connected to the screw 16
Moves to the left in the figure. As a result, the resin that has been heated and melted in the screw cylinder 14 is injected into the mold 1 through the nozzle 15.
射出に伴ない、キャビティ３内に充填された樹脂圧力に
よって型締力が負けて型開きする。Along with the injection, the mold clamping force is lost due to the resin pressure filled in the cavity 3, and the mold is opened.
この状態が続き、スクリュが予め設定されたスクリュ位
置に到達した時の信号或は射出開始と同時に作動するタ
イマーのタイムアウト信号により、シーケンサ１３はゲ
ートカットシリンダ１９を作動させ、第６図に示す金型
内詳細図の様にゲート４を閉塞して溶融樹脂が圧縮工程
中にキャビティ３からスプルー２を通ってノズル１５へ
の逆流することを防止する。This state continues, and the sequencer 13 operates the gate cut cylinder 19 by a signal when the screw reaches a preset screw position or a time-out signal of a timer which operates at the same time as the start of injection, and the sequencer 13 operates the gate cut cylinder 19 so that the money shown in FIG. The gate 4 is closed to prevent the molten resin from flowing backward from the cavity 3 through the sprue 2 to the nozzle 15 during the compression process as shown in the in-mold detailed view.
このようにしてゲート４を閉塞後、比例電磁圧力弁１２
への指令値を変更し、圧縮工程用の高圧型締圧に切換え
て、金型１を閉じキャビティ３内の樹脂を圧縮する。After closing the gate 4 in this way, the proportional electromagnetic pressure valve 12
The command value is changed to a high mold clamping pressure for the compression process, the mold 1 is closed, and the resin in the cavity 3 is compressed.
ところで、以上述べた従来の射出圧縮成形装置にあって
は、次の如き問題点がある。By the way, the conventional injection compression molding apparatus described above has the following problems.
(1)ゲートカットシリンダを金型内部に設けているた
め、金型の構造が複雑となりコスト高になる。(1) Since the gate cut cylinder is provided inside the mold, the structure of the mold is complicated and the cost is high.
(2)金型のキャビティ内に樹脂の充填が完了すると、溶
融樹脂は冷却が進行してキャビティ表面よりスキン層と
呼ばれる固化層又は高粘度層の生成が始まる。充填完了
時、ゲートカットシリンダが作動すると、ゲート付近の
キャビティの樹脂に脈動を生じるので、前記スキン層に
ずり応力が生じ、残留応力が発生する。このため「そ
り」と呼ばれる変形や、コンパクトディスク・光ディス
ク等の円板状記録媒体基盤では、複屈折の悪化等の成形
不良を生じる。(2) When the resin is completely filled in the cavity of the mold, the molten resin is cooled and a solidified layer or a high-viscosity layer called a skin layer starts to be generated from the surface of the cavity. When the gate cut cylinder operates at the time of completion of filling, pulsation occurs in the resin in the cavity near the gate, so that shear stress occurs in the skin layer and residual stress occurs. For this reason, deformation called "sledding" and disk-shaped recording medium substrates such as compact discs and optical discs cause molding defects such as deterioration of birefringence.
(3)ゲートカットシリンダの動作完了後でなければ圧縮
工程に切換えることができないので、ゲートカットシリ
ンダの動作時間による遅れにより、キャビティの溶融樹
脂の冷却が進行して粘度が高くなるため、均一な圧縮が
かけられない。(3) Since it is only possible to switch to the compression process after the operation of the gate cut cylinder is completed, the viscosity of the molten resin in the cavity is increased due to the delay due to the operation time of the gate cut cylinder, which increases the viscosity. No compression can be applied.
このため、冷却による収縮の補償が一定して行なえない
ので、寸法精度不良を生じる。For this reason, the shrinkage due to cooling cannot be compensated constantly, resulting in poor dimensional accuracy.
（発明が解決しようとする問題点） このように、従来のこの種射出圧縮成形では、ゲートカ
ットシリンダの存在により金型の構造が複雑化し、また
同シリンダの作動によりキャビティ内の樹脂に脈動を発
生させて成形不良を起こし、更には同シリンダの動作遅
れのためその間に一部樹脂粘度が高くなり均一な圧縮が
かけられず寸法精度の高いものが得難いという問題点が
あった。(Problems to be Solved by the Invention) As described above, in the conventional injection compression molding of this kind, the structure of the mold is complicated by the existence of the gate cut cylinder, and the pulsation of the resin in the cavity is caused by the operation of the cylinder. However, there is a problem in that it is difficult to obtain a product having a high dimensional accuracy because the resin viscosity is partially increased during the operation due to the operation delay of the cylinder and uniform compression cannot be applied.
本発明は、これらの問題点を同時に解決すべく開発され
たもので、金型構造の複雑化を回避し、寸法精度の高い
成形と可能とする射出圧縮成形方法及び装置を提供しよ
うとするものである。The present invention has been developed to solve these problems at the same time, and an object of the present invention is to provide an injection compression molding method and apparatus capable of performing molding with high dimensional accuracy while avoiding complication of the mold structure. Is.
（問題点を解決するための手段） このため本発明は、低圧で型締して射出を開始し、充填
中にはその充填圧力により型開きを生じさせると共に、
充填完了後に型締圧力を上げて金型内の樹脂を圧縮する
射出圧縮成形方法において、圧縮工程中スクリュを停止
させ、同停止時のスクリュ位置を保持する様に閉ループ
制御するようにしてなるものであり、また低圧で型締し
て射出を開始し、充填中にはその充填圧力により型開き
を生じさせると共に、充填完了後に型締圧力を上げて金
型内の樹脂を圧縮する射出圧縮成形装置において、充填
完了信号を受けスクリュの位置信号を入力してスクリュ
の停止位置を保持する様に制御する位置制御装置と、同
制御装置の出力により射出機構を制御するサーボ弁を備
えてなるもので、これを問題点解決のための手段とする
ものである。(Means for Solving Problems) Therefore, according to the present invention, the mold is clamped at a low pressure to start injection, and the mold is opened by the filling pressure during filling, and
An injection compression molding method in which the mold clamping pressure is increased after the filling is completed to compress the resin in the mold, and the screw is stopped during the compression process, and closed loop control is performed so as to maintain the screw position at the time of the stop. In addition, injection compression molding is performed in which the mold is opened at a low pressure to start injection, the mold opening is caused by the filling pressure during filling, and the mold clamping pressure is increased after the filling is completed to compress the resin in the mold. The device comprises a position control device for receiving a filling completion signal and inputting a screw position signal so as to hold the stop position of the screw, and a servo valve for controlling the injection mechanism by the output of the control device. Then, this is a means for solving the problem.
（作用） 射出圧縮工程時スクリュが停止した位置を保持するよう
に制御することにより、キャビティ内の樹脂がスプレー
やノズル逆流するのを防止することができる。(Operation) By controlling the screw to hold the stopped position during the injection compression process, it is possible to prevent the resin in the cavity from flowing back through the spray or the nozzle.
（実施例） 以下、本発明の実施例を図面に従って詳述する。(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings.
第１図に本発明の一実施例であるシステム図を示す。こ
こでは、第５図に示した従来のものと相違する点を中心
に説明する。FIG. 1 shows a system diagram which is an embodiment of the present invention. Here, the points different from the conventional one shown in FIG. 5 will be mainly described.
本実施例装置における特徴部分は、射出ラム１８に取付
けられたスクリュ位置を検出するエンコーダ等の位置検
出器２０、位置検出器２０のパルス出力Ｓを微分して射
出速度Ｖを演算するＦ／Ｖ変換器（周波数／電圧変換
器）等を用いた微分器２１、射出速度制御装置２２又は
位置制御装置２３の出力を増幅器２５につなぐ切換スイ
ッチング回路２４、増幅器２５の出力により射出シリン
ダ１７への圧油を調節するサーボ弁２６、アキュムレー
タ２７、アキュムレータ２７からポンプ３０への逆流を
防ぐ逆止弁２８、アキュムレータ２７の蓄圧圧力を設定
するリリーフ弁２９により構成されている部分にある。
本実施例による金型１は第５図に示した従来例とはゲー
トカットシリンダ１９が設けられていない点のみが異な
るものである。The characteristic part of the apparatus of this embodiment is the position detector 20 such as an encoder for detecting the screw position attached to the injection ram 18, and the pulse output S of the position detector 20 is differentiated to calculate the injection speed V F / V. The output of the differentiator 21, the injection speed control device 22 or the position control device 23 using a converter (frequency / voltage converter) or the like is connected to the amplifier 25. The switching switching circuit 24 connects the output of the amplifier 25 to the injection cylinder 17. It is composed of a servo valve 26 for adjusting oil, an accumulator 27, a check valve 28 for preventing backflow from the accumulator 27 to the pump 30, and a relief valve 29 for setting the accumulated pressure of the accumulator 27.
The mold 1 according to this embodiment is different from the conventional example shown in FIG. 5 only in that a gate cut cylinder 19 is not provided.
以上の部分のうち、射出速度制御装置２２は、第２図に
示すように速度設定器３１、速度設定器３１の指令値か
ら微分器２１の出力値Ｖを減算して偏差ｅｖを出力する
比較器３２、偏差ｅｖを比例・積分・微分制御して出力
する速度制御器３３から構成されている。Of the above parts, the injection speed control device 22 subtracts the output value V of the differentiator 21 from the command value of the speed setter 31 and the speed setter 31, and outputs the deviation e v, as shown in FIG. It is composed of a comparator 32 and a speed controller 33 that outputs the deviation e v by proportional / integral / derivative control.
一方、上記位置制御装置２３は、第３図に示すように位
置検出器２０の出力は、スイッチング回路３４を経てラ
ッチ回路３５に入力している。ラッチ回路３５の出力か
ら位置検出器２０の出力を減算して偏差ｅｓを出力する
比較器３６、偏差ｅｓを比例・積分・微分制御して出力
する位置制御器３７から構成されている。On the other hand, in the position control device 23, the output of the position detector 20 is input to the latch circuit 35 via the switching circuit 34 as shown in FIG. Comparator 36 for outputting a subtraction to the deviation e s the output of the position detector 20 from the output of the latch circuit 35, and a position controller 37 for outputting a deviation e s proportional-integral-derivative control to.
以上の構成において、その制御動作について第４図の制
御特性線図を参照しつつ説明する。The control operation of the above configuration will be described with reference to the control characteristic diagram of FIG.
最初は従来と同様に射出開始前に低圧にて型締が行なわ
れる。シーケンサ１３の指令により射出速度制御装置２
２内の速度設定器３１が作動して、予め設定された射出
速度指令を出力し、微分器２１の出力値Ｖとの偏差ｅｖ
に基づき速度制御器３３により、所定の速度になるよう
にサーボ弁２６が調節される。なお、このとき切換スイ
ッチング回路２４の接点は射出速度制御装置２２側の接
点２４ａにつながっている。充填完了を検知する手段と
して、スクリュ１６が予め設定されたスクリュ位置に到
達するか、或は射出開始と同時に作動するタイマーのタ
イムアウトが採用される。At first, the mold is clamped at a low pressure before the injection is started as in the conventional case. Injection speed control device 2 according to a command from the sequencer 13
The speed setter 31 in 2 operates to output a preset injection speed command, and the deviation e v from the output value V of the differentiator 21
Based on the above, the speed controller 33 adjusts the servo valve 26 to a predetermined speed. At this time, the contact of the switching circuit 24 is connected to the contact 24a on the injection speed control device 22 side. As a means for detecting the completion of filling, a time-out of a timer which operates at the same time when the screw 16 reaches a preset screw position or when injection is started is adopted.
充填完了時を検知するとシーケンサ１３は前記速度設定
器３１に指令を行ない、速度指令を零にする。その結
果、速度制御器３３が働いて射出シリンダ１７への圧油
が停止され、射出速度が減速する。射出速度Ｖが零にな
ると、シーケンサ１３の指令により位置制御装置２３の
スイッチング回路３４が「切」となり同時に切換スイッ
チング回路２４の接点が射出速度制御装置２２側の接点
２４ａから位置制御装置２３側の接点２４ｂに切換えら
れ、位置制御装置２３の出力によりサーボ弁２６が動作
する。When the completion of filling is detected, the sequencer 13 issues a command to the speed setter 31 to set the speed command to zero. As a result, the speed controller 33 operates, the pressure oil to the injection cylinder 17 is stopped, and the injection speed is reduced. When the injection speed V becomes zero, the switching circuit 34 of the position control device 23 is turned off by the command of the sequencer 13, and at the same time, the contact of the switching circuit 24 is changed from the contact 24a on the injection speed control device 22 side to the position control device 23 side. The servo valve 26 is operated by switching to the contact 24b and the output of the position control device 23.
ラッチ回路３５は、入力信号を常に取り込んでそのまま
比較器３６へ出力する機能をもっている。そして、位置
制御装置２３のスイッチング回路３４が「切」になる
と、「切」直前の入力信号、すなわち射出速度零の時の
スクリュ位置（これをＳｏとする）を取り込んでから、
新しい信号が入力されないので、ラッチ回路３５はＳｏ
の出力を保持することになる。The latch circuit 35 has a function of always taking in an input signal and outputting it to the comparator 36 as it is. Then, when the switching circuit 34 of the position control device 23 is turned "off", the input signal immediately before "off", that is, the screw position when the injection speed is zero (this is referred to as S o ) is fetched,
Since a new signal is not input, the latch circuit 35 outputs S o
Will hold the output of.
従って、比較器３６で演算されるＳｏに対する偏差ｅｓ
（＝Ｓｏ−Ｓ）信号を入力とする位置制御器３７の動作
により、スクリュ位置Ｓｏになるように閉ループ制御さ
れる。Therefore, the deviation e s with respect to S o calculated by the comparator 36
By the operation of the position controller 37 which receives the (= S o −S) signal as an input, closed loop control is performed so as to reach the screw position S o .
ここで、金型１の型締圧力につては、充填完了に続き従
来と同様に、シーケンサ１３の指令により型締圧力が上
げられ、圧縮工程に切換わる。Here, with respect to the mold clamping pressure of the mold 1, following the completion of the filling, the mold clamping pressure is increased by a command from the sequencer 13 and switched to the compression process as in the conventional case.
以上の実施例において、充填完了検知手段は前述のもの
に限定する必要はなく、金型キャビティ圧力、金型キャ
ビティの樹脂温度、型開量等の検出値と予め設定した値
とを比較する手段を用いても良い。In the above embodiments, the filling completion detecting means is not limited to the above-mentioned means, and means for comparing the detected values such as the mold cavity pressure, the resin temperature of the mold cavity, and the mold opening amount with preset values. May be used.
（発明の効果） 以上詳細に説明した如く本発明では、充填完了時のスク
リュ位置は機械限のように固定部材に当たっておらず、
任意のどちらでも圧力のバランスにより動き得る位置で
あり、それをサーボ弁によって常に油圧により位置制御
しようとするものである。従って本発明では、ゲートカ
ット装置等の格別の樹脂通路閉塞装置を使用しなくて
も、圧縮工程時においてキャビティからの樹脂の逆流を
防止できるので、金型の構造が簡素化しコストダウンに
つながり、またゲートカットによる樹脂脈動がないの
で、変形、複屈折の悪化等の成形不良が発生しない。(Effects of the Invention) As described in detail above, in the present invention, the screw position at the time of completion of filling does not hit the fixing member like the mechanical limit,
It is a position that can be moved by any pressure balance, and the position is always controlled by hydraulic pressure by a servo valve. Therefore, in the present invention, it is possible to prevent the reverse flow of the resin from the cavity during the compression step without using a special resin passage blocking device such as a gate cut device, leading to a simplified structure of the mold and cost reduction, Further, since there is no resin pulsation due to gate cut, molding defects such as deformation and deterioration of birefringence do not occur.
更に本発明によれば、圧縮工程の開始タイミングをゲー
トカットシリンダの作動条件の後に限定しなくて良いた
め、充填完了時の最も樹脂温度が高く低粘度のときに、
圧縮がかけられるので、最適な成形条件が設定でき寸法
精度も十分に確保できる。Furthermore, according to the present invention, since the start timing of the compression step does not have to be limited after the operating conditions of the gate cut cylinder, when the highest resin temperature and low viscosity at the time of completion of filling,
Since it is compressed, optimum molding conditions can be set and sufficient dimensional accuracy can be secured.
第１図は本発明の一実施例を示す射出圧縮成形のシステ
ム図、第２図は同システム内の射出速度制御装置のブロ
ック線図、第３図は同じく位置制御装置のブロック線
図、第４図は本発明の一実施例としての制御特性線図、
第５図は従来の射出圧縮成形におけるシステム図、第６
図は従来例を示す金型内ゲートカットシリンダの作動を
示す断面図である。 図の主要部分の説明 ２０……位置検出器 ２１……微分器 ２２……射出速度制御装置 ２３……位置制御装置 ２４……切換スイッチング回路 ２５……増幅器 ２６……サーボ弁FIG. 1 is a system diagram of injection compression molding showing an embodiment of the present invention, FIG. 2 is a block diagram of an injection speed control device in the system, and FIG. 3 is a block diagram of a position control device. FIG. 4 is a control characteristic diagram as one embodiment of the present invention,
FIG. 5 is a system diagram of conventional injection compression molding, and FIG.
The figure is a cross-sectional view showing the operation of a gate cut cylinder in a mold showing a conventional example. Description of main parts of the figure 20 ...... Position detector 21 ...... Differentiator 22 ...... Injection speed control device 23 ...... Position control device 24 ...... Switching switching circuit 25 ...... Amplifier 26 ...... Servo valve
Claims (2)
その充填圧力により型開きを生じさせると共に、充填完
了後に型締圧力を上げて金型内の樹脂を圧縮する射出圧
縮成形方法において、圧縮工程中スクリュを停止させ、
同停止時のスクリュ位置を保持する様に閉ループ制御す
ることを特徴とする射出圧縮成形方法。Claims: 1. Injection compression for starting injection by clamping at a low pressure, causing a mold opening due to the filling pressure during filling, and increasing the mold clamping pressure after completion of filling to compress the resin in the mold. In the molding method, stop the screw during the compression process,
An injection compression molding method characterized by performing closed loop control so as to maintain the screw position at the time of stop.
その充填圧力により型開きを生じさせると共に、充填完
了後に型締圧力を上げて金型内の樹脂を圧縮する射出圧
縮成形装置において、充填完了信号を受けスクリュの位
置信号を入力してスクリュの停止位置を保持する様に制
御する位置制御装置と、同制御装置の出力により射出機
構を制御するサーボ弁を備えてなることを特徴とする射
出圧縮成形装置。2. Injection compression in which the mold is clamped at a low pressure to start the injection, the mold pressure is generated during the filling, and the mold clamping pressure is increased after the completion of the filling to compress the resin in the mold. The molding apparatus is provided with a position control device that receives a filling completion signal and controls the position signal of the screw so as to maintain the stop position of the screw, and a servo valve that controls the injection mechanism by the output of the control device. An injection compression molding device characterized in that
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61155957A JPH0653379B2 (en) | 1986-07-04 | 1986-07-04 | Injection compression molding method and apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61155957A JPH0653379B2 (en) | 1986-07-04 | 1986-07-04 | Injection compression molding method and apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6313726A JPS6313726A (en) | 1988-01-21 |
| JPH0653379B2 true JPH0653379B2 (en) | 1994-07-20 |
Family
ID=15617229
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61155957A Expired - Fee Related JPH0653379B2 (en) | 1986-07-04 | 1986-07-04 | Injection compression molding method and apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0653379B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01241420A (en) * | 1988-03-24 | 1989-09-26 | Komatsu Ltd | Molding process and molding device of injection compression molding machine |
| US5478520A (en) * | 1989-10-27 | 1995-12-26 | Mitsubishi Jukogyo Kabushiki Kaisha | Process for injection molding and apparatus therefor |
| DE69021824T2 (en) * | 1989-10-27 | 1996-04-18 | Mitsubishi Heavy Ind Ltd | Injection molding process and apparatus therefor. |
| JP2787651B2 (en) * | 1994-03-22 | 1998-08-20 | 日精樹脂工業株式会社 | Molding method of injection molding machine |
| JP4502669B2 (en) * | 2004-03-05 | 2010-07-14 | 住友重機械工業株式会社 | Injection molding machine and control method thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS593332A (en) * | 1982-06-30 | 1984-01-10 | Nissei Plastics Ind Co | Detection of output in motor-driven molding machine |
| JPS6166623A (en) * | 1984-09-10 | 1986-04-05 | Hitachi Ltd | Mold device for injection and compression molding |
-
1986
- 1986-07-04 JP JP61155957A patent/JPH0653379B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6313726A (en) | 1988-01-21 |
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