JPH09277329A - Method for controlling dwelling process of injection molding machine - Google Patents

Method for controlling dwelling process of injection molding machine

Info

Publication number
JPH09277329A
JPH09277329A JP9437996A JP9437996A JPH09277329A JP H09277329 A JPH09277329 A JP H09277329A JP 9437996 A JP9437996 A JP 9437996A JP 9437996 A JP9437996 A JP 9437996A JP H09277329 A JPH09277329 A JP H09277329A
Authority
JP
Japan
Prior art keywords
pressure
injection
target value
injection pressure
loop
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
Application number
JP9437996A
Other languages
Japanese (ja)
Other versions
JP3299112B2 (en
Inventor
Michiyasu Muraoka
通康 村岡
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shibaura Machine Co Ltd
Original Assignee
Toshiba Machine Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toshiba Machine Co Ltd filed Critical Toshiba Machine Co Ltd
Priority to JP09437996A priority Critical patent/JP3299112B2/en
Publication of JPH09277329A publication Critical patent/JPH09277329A/en
Application granted granted Critical
Publication of JP3299112B2 publication Critical patent/JP3299112B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

PROBLEM TO BE SOLVED: To check pressure variation after dwelling changeover by a method in which injection pressure is open-loop-controlled until injection velocity in a dwelling process reaches a target value, then the injection pressure is closed loop-controlled and additionally closed-loop-controlled to a set target value. SOLUTION: In a controller 30, apart from an ordinary set target value setting device 32' with regard to injection velocity and injection pressure and a comparative operation device 34', a prescribed target value setting device 32 especially with respect to a dwelling process and a comparative operation device 34 are provided. In this way, in an initial section after the passage of a changeover point from a filling process to the dwelling process, the injection pressure, until the injection velocity reaches a prescribed target value, a control method is made a closed loop. Next, in an intermediate section, the injection pressure is changed to a prescribed target value (for example pressure at a changeover point), and the control method is changed to a closed loop. In the final section, the injection pressure is returned to a set target value. In this way, pressure variation can be checked effectively by changing to the open loop in the initial section.

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、射出成形機の制御
方法に係り、特にその充填工程から保圧工程への切換点
を含む保圧工程における制御方法に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control method for an injection molding machine, and more particularly to a control method for a pressure holding process including a switching point from the filling process to the pressure holding process.

【0002】[0002]

【従来の技術】一般に、射出成形機の射出工程は、溶融
樹脂を金型キャビティ内に充填する充填工程と、この充
填された溶融樹脂の冷却固化に伴う収縮減圧を保圧する
保圧工程とから形成されている。そして、前記射出工程
において、射出製品の品質を確保するためには、この射
出工程、特に充填工程から保圧工程への切換点を含む保
圧工程における射出条件設定値(圧力および速度)の適
正な設定および維持が不可欠である。
2. Description of the Related Art Generally, an injection process of an injection molding machine comprises a filling process for filling a molten resin into a mold cavity and a pressure holding process for holding a contraction decompression caused by cooling and solidification of the filled molten resin. Has been formed. In order to ensure the quality of the injected product in the injection process, the injection condition setting values (pressure and speed) in this injection process, especially in the pressure holding process including the switching point from the filling process to the pressure holding process, are appropriate. Proper setup and maintenance is essential.

【0003】しかるに、前記設定値に対し、実際の速度
および圧力の維持、安定性の確保は、油温等外乱の影響
を受けて困難なものであった。近来は、これら外乱の影
響を自動的に修正する方法、すなわち充填工程における
射出速度および保圧工程における射出圧力を検出し、こ
の検出値を予め設定した基準値(目標値)と比較して前
記射出速度および/または射出圧力を閉ループ(フィー
ドバック)制御することにより、実際の速度および圧力
の維持、安定性の確保ができるよう構成した射出成形機
の制御方法が提案されている。
However, it has been difficult to maintain the actual speed and pressure and to secure the stability with respect to the set values due to the influence of disturbance such as oil temperature. Recently, there is a method of automatically correcting the influence of these disturbances, that is, the injection speed in the filling process and the injection pressure in the pressure holding process are detected, and the detected value is compared with a preset reference value (target value). There has been proposed a control method for an injection molding machine configured so that the actual speed and pressure can be maintained and the stability can be ensured by controlling the injection speed and / or the injection pressure in a closed loop (feedback).

【0004】すなわち、例えば、本出願人の出願に係る
一提案(特開平7−246642号公報)によれば、充
填工程から保圧工程への切換点における射出圧力の検出
値を、基準値(目標値)と比較して充填工程における最
終射出速度(またはその速度変化パラメータ)を補正す
ることにより、前記射出条件を何等の熟練を必要とする
ことなく、自動的に設定できるように構成されている。
また、別の提案(特開平6−354920号公報)によ
れば、充填工程における射出圧力の検出値を、基準目標
値と比較して充填工程における射出速度を補正すること
により、実際の速度および圧力の維持、安定性の確保を
確実に行うことができる。
That is, for example, according to one proposal (Japanese Patent Application Laid-Open No. 7-246642) filed by the applicant of the present invention, the detection value of the injection pressure at the switching point from the filling process to the pressure holding process is set to a reference value ( By correcting the final injection speed (or its speed change parameter) in the filling process in comparison with the target value), the injection condition can be automatically set without any skill. There is.
Further, according to another proposal (Japanese Patent Laid-Open No. 6-354920), an actual speed and an actual speed are corrected by comparing the detected value of the injection pressure in the filling process with a reference target value to correct the injection speed in the filling process. It is possible to reliably maintain the pressure and ensure the stability.

【0005】[0005]

【発明が解決しようとする課題】しかしながら、前述し
た従来の射出成形機の制御方法には、なお次に述べるよ
うな難点があった。
However, the above-mentioned conventional control method for the injection molding machine still has the following drawbacks.

【0006】すなわち、前記従来の制御方法において、
保圧切換点で射出圧力の検出値(実際圧力)と基準値と
の間に大きな偏差があると、この種のフィードバック
(閉ループ)制御には、作動タイムラグが避けられない
ことから、大きな圧力変動が発生し、しかもこの圧力変
動は、前記保圧切換点でスクリュが前記保圧切換後もな
お移動していると、さらにこの圧力変動が助長されるた
め、成形品に重量のバラツキやソリ、ヒケ等が発生し
て、品質を低下させる難点を有していた。
That is, in the above conventional control method,
If there is a large deviation between the injection pressure detection value (actual pressure) and the reference value at the holding pressure switching point, this type of feedback (closed loop) control cannot avoid an operating time lag, resulting in large pressure fluctuations. If the screw is still moving at the pressure holding switching point even after the pressure holding switching, the pressure fluctuation is further promoted. There is a problem that a sink mark or the like occurs and the quality is deteriorated.

【0007】そこで、本発明の目的は、充填工程から保
圧工程への切換点を含む保圧工程における圧力変動であ
って、保圧切換後もなおスクリュが移動している場合に
おいても、この圧力変動を有効に抑止することができる
射出成形機の保圧工程制御方法を提供することにある。
Therefore, an object of the present invention is pressure fluctuation in the pressure-holding process including the switching point from the filling process to the pressure-holding process, even when the screw is still moving after the pressure-holding switching. It is an object of the present invention to provide a pressure-holding process control method for an injection molding machine that can effectively suppress pressure fluctuations.

【0008】[0008]

【課題を解決するための手段】先の目的を達成するため
に、本発明に係る射出成形機の保圧工程制御方法は、充
填工程における射出速度を検出してこの検出値を予め設
定した基準目標値と比較することにより前記射出速度を
閉ループ制御すると共に、保圧工程における射出圧力を
検出してこの検出値を予め設定した基準目標値と比較す
ることにより前記射出圧力を閉ループ制御するように構
成した射出成形機の保圧工程制御方法において、充填工
程から保圧工程への切換点の通過後に射出速度が所定の
目標値に達するまでの初期区間は射出圧力を開ループ制
御し、この射出速度の目標値に達すると対応する射出圧
力の目標値を設定して、射出圧力が前記所定の目標値と
なるように射出圧力を閉ループ制御する中間区間と、さ
らに射出圧力をそれぞれ設定目標値となるように閉ルー
プ制御する終期区間とからなることを特徴とする。
In order to achieve the above object, a method of controlling a pressure-holding process of an injection molding machine according to the present invention detects an injection speed in a filling process and presets this detection value as a reference. The injection speed is closed-loop controlled by comparing with a target value, and the injection pressure is closed-loop controlled by detecting the injection pressure in the pressure-holding process and comparing the detected value with a preset reference target value. In the pressure-holding process control method of the configured injection molding machine, the injection pressure is open-loop controlled in the initial section until the injection speed reaches a predetermined target value after passing through the switching point from the filling process to the pressure-holding process. When the target value of the velocity is reached, a corresponding target value of the injection pressure is set, and the intermediate section in which the injection pressure is closed-loop controlled so that the injection pressure becomes the predetermined target value, and the injection pressure is further set. Characterized in that comprising a final section in which closed-loop control such that the respective set target value.

【0009】この場合、前記中間区間からタイマを作動
させて、このタイマにより設定される所定の遅延時間後
に、前記終期区間とすることができる。
In this case, the timer can be operated from the intermediate section, and after the predetermined delay time set by the timer, the final section can be reached.

【0010】本発明においては、仮に保圧切換点で射出
圧力の検出値と基準値との間に大きな偏差があっても、
この偏差に基因する圧力変動は、保圧工程の初期区間に
おいて、制御方式が閉ループから開ループに変更されて
いることにより、有効に抑止することができる。また、
仮に制御方式が開ループから閉ループに変更される中間
区間において、別の圧力変動が発生しようとしても、こ
の圧力変動は、中間区間において、制御射出圧力の所定
目標値を設定目標値に可及的に近似させて設定しておく
ことにより、有効に抑止して安定化させることができ
る。このように、本発明によれば、充填工程から保圧工
程への切換点を含む保圧工程における圧力変動を有効に
抑止し得るので、成形製品の品質を大幅に向上すること
ができる。
In the present invention, even if there is a large deviation between the detected value of the injection pressure and the reference value at the holding pressure switching point,
The pressure fluctuation due to this deviation can be effectively suppressed by changing the control system from closed loop to open loop in the initial section of the pressure holding process. Also,
Even if another pressure fluctuation is attempted to occur in the intermediate section where the control method is changed from the open loop to the closed loop, this pressure fluctuation will cause the predetermined target value of the control injection pressure to reach the set target value in the intermediate section. By setting the value close to, it is possible to effectively suppress and stabilize. As described above, according to the present invention, it is possible to effectively suppress the pressure fluctuation in the pressure holding process including the switching point from the filling process to the pressure holding process, so that the quality of the molded product can be significantly improved.

【0011】[0011]

【実施例】次に、本発明に係る射出成形機の保圧工程制
御方法の実施例につき、この制御方法を実施する装置と
の関係において、添付図面を参照しながら以下詳細に説
明する。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a pressure-holding process control method for an injection molding machine according to the present invention will be described in detail below with reference to the accompanying drawings in relation to an apparatus for carrying out this control method.

【0012】先ず初めに、本発明における射出成形機の
保圧工程制御方法を実施する装置の基本的構成を、図1
に示す。本発明方法を実施する装置は、基本的には、可
変容量ポンプ10からの圧油を圧力調整弁24、流量調
整弁12および方向切換弁14を介して射出成形機16
のシリンダ16aに給排し、そのスクリュ16bを進退
させることにより、溶融樹脂を金型キャビティ(図示せ
ず)内に充填および保圧して製品を成形する射出成形機
において、前記充填工程および保圧工程における射出速
度Vおよび射出圧力Pを、それぞれ速度検出器20およ
び圧力検出器18を介して検出する。
First, the basic construction of an apparatus for carrying out the method of controlling the pressure-holding process of an injection molding machine according to the present invention is shown in FIG.
Shown in The apparatus for carrying out the method of the present invention basically comprises an injection molding machine 16 for pressure oil from the variable displacement pump 10 via a pressure control valve 24, a flow rate control valve 12 and a direction switching valve 14.
In the injection molding machine that fills and holds the molten resin in the die cavity (not shown) by feeding and discharging it to and from the cylinder 16a of the mold and then moving the screw 16b forward and backward, The injection speed V and the injection pressure P in the process are detected by the speed detector 20 and the pressure detector 18, respectively.

【0013】次いで、これらの検出値Vs 、Ps を、コ
ントローラ30内において、予め設定した設定値と比較
することにより、前記射出速度および/または射出圧力
(検出値Vs 、Ps )を閉ループ制御するように構成さ
れている。なお、参照符号22は、充填工程から保圧工
程へのスクリュ切換点Lを検出する位置検出器を示す。
Then, the detected values Vs and Ps are compared with preset values in the controller 30 so that the injection speed and / or the injection pressure (detected values Vs and Ps) are closed-loop controlled. Is configured. Reference numeral 22 indicates a position detector for detecting the screw switching point L from the filling process to the pressure holding process.

【0014】しかるに、本発明においては、前記構成に
おいて、図2に示すように、コントローラ30には、射
出速度Vおよび射出圧力Pに関する通常の設定目標値設
定器32′および比較演算器34′とは別に、特に保圧
工程Hに関する所定の目標値設定器32および比較演算
器34とが設けられている。そして、これにより、充填
工程Iから保圧工程Hへの切換点Lの通過後における所
定の初期区間t1 は、射出圧力を、射出速度Vが所定目
標値Vc に達するまで、制御方式を開ループにする。
According to the present invention, however, in the above-described configuration, as shown in FIG. 2, the controller 30 includes a normal set target value setter 32 'and a comparison calculator 34' for the injection speed V and the injection pressure P. Separately, a predetermined target value setter 32 and a comparison calculator 34, especially for the pressure-holding process H, are provided. Thus, in the predetermined initial section t1 after passing the switching point L from the filling process I to the pressure maintaining process H, the injection pressure is controlled until the injection speed V reaches the predetermined target value Vc. To

【0015】次いで、初期区間t1 に連続する中間区間
t2 は、射出圧力の目標値を射出速度Vの前記所定目標
値Vc からこれに対応する射出圧力Pの所定目標値(例
えば、切換時点の圧力)Pc に変更すると共に、制御方
式を開ループから閉ループに変更する。
Next, in the intermediate section t2 which is continuous with the initial section t1, the target value of the injection pressure is changed from the predetermined target value Vc of the injection speed V to the predetermined target value of the injection pressure P (for example, the pressure at the time of switching). ) Change to Pc and change control method from open loop to closed loop.

【0016】さらに、中間区間t2 に連続する終期区間
t3 は、射出圧力の目標値を射出圧力Pの所定目標値P
c から設定目標値PH1 に復帰するように構成されてい
る。
Further, in the final section t3 which is continuous with the intermediate section t2, the target value of the injection pressure is set to the predetermined target value P of the injection pressure P.
It is configured to return from c to the set target value PH1.

【0017】さらに、図3においては、前記切換点Lか
らの射出圧力の変動を点線により従来技術の場合を示
し、また1点鎖線で中間区間の制御がない場合を示し、
そして実線で本実施例の場合についての拡大図を示す。
Further, in FIG. 3, the fluctuation of the injection pressure from the switching point L is shown by the dotted line in the case of the prior art, and the one-dot chain line shows the case where there is no control in the intermediate section.
Then, a solid line shows an enlarged view of the case of the present embodiment.

【0018】なお、ここで前述した所定の或いは設定し
た、初期区間t1 および中間区間t2 並びに目標値Vc
、Pc の各大きさは、結論的には、射出圧力の所定目
標値Pc の大きさがこれに対応する設定目標値PH1 の
大きさに可及的に近似して設定されるように、それぞれ
が設定されている。従って、これにより、制御方式が開
ループから閉ループに変更される中間区間t2 で発生し
ようとする圧力変動が、有効に抑止されるように構成さ
れている。
It should be noted that the above-mentioned predetermined or set initial section t1, intermediate section t2 and target value Vc are set.
In conclusion, the magnitudes of Pc and Pc are set so that the magnitude of the predetermined target value Pc of the injection pressure is set as close as possible to the magnitude of the corresponding set target value PH1. Is set. Therefore, by this, the pressure fluctuation which tends to occur in the intermediate section t2 when the control system is changed from the open loop to the closed loop is effectively suppressed.

【0019】また、前記中間区間t2 は、タイマで適宜
設定することにより達成することもできる。
The intermediate interval t2 can also be achieved by appropriately setting a timer.

【0020】このように、本発明においては、仮に保圧
切換点で射出圧力の検出値と設定目標値との間に大きな
偏差があっても、この偏差に基因する圧力変動は、保圧
工程の初期区間において制御方式が閉ループから開ルー
プに変更されていることにより、有効に抑止することが
できる。また、仮に制御方式が開ループから閉ループに
変更される中間区間において、別の圧力変動が発生しよ
うとしても、この圧力変動は、中間区間において制御射
出圧力の所定目標値を設定目標値に可及的に近似させて
設定しておくことにより、有効に抑止して安定化させる
ことができる。
As described above, in the present invention, even if there is a large deviation between the detected value of the injection pressure and the set target value at the pressure-holding switching point, the pressure fluctuation due to this deviation causes the pressure-holding step. Since the control method is changed from the closed loop to the open loop in the initial section of, it can be effectively suppressed. Further, even if another pressure fluctuation is attempted to occur in the intermediate section where the control system is changed from the open loop to the closed loop, this pressure fluctuation can cause the predetermined target value of the control injection pressure to reach the set target value in the intermediate section. It is possible to effectively suppress and stabilize by setting the values so that they are approximated to each other.

【0021】このように、本発明によれば、充填工程か
ら保圧工程への切換点を含む保圧工程における圧力変動
を有効に抑止することができるので、成形製品の品質を
大幅に向上することができる。
As described above, according to the present invention, it is possible to effectively suppress the pressure fluctuation in the pressure-holding process including the switching point from the filling process to the pressure-holding process, so that the quality of the molded product is significantly improved. be able to.

【0022】以上、本発明の好適な実施例について説明
したが、本発明は前記実施例に限定されることなく、本
発明の精神を逸脱しない範囲内において、多くの設計変
更をすることが可能である。
Although the preferred embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and many design changes can be made without departing from the spirit of the present invention. Is.

【0023】[0023]

【発明の効果】以上説明したように、本発明に係る射出
成形機の保圧工程制御方法は、充填工程における射出速
度を検出してこの検出値を予め設定した基準目標値と比
較することにより前記射出速度を閉ループ制御すると共
に、保圧工程における射出圧力を検出してこの検出値を
予め設定した基準目標値と比較することにより前記射出
圧力を閉ループ制御するように構成した射出成形機の保
圧工程制御方法において、充填工程から保圧工程への切
換点の通過後に射出速度が所定の目標値に達するまでの
初期区間は射出圧力を開ループ制御し、この射出速度の
目標値に達すると対応する射出圧力の目標値を設定し
て、射出圧力が前記所定の目標値となるように射出圧力
を閉ループ制御する中間区間、さらに射出圧力をそれぞ
れ設定目標値となるように閉ループ制御する終期区間と
から構成することにより、仮に保圧切換点で射出圧力の
検出値と設定目標値との間に大きな偏差があっても、こ
の偏差に基因する圧力変動は、保圧工程の初期区間にお
いて、制御方式が開ループになっていることにより、有
効に抑止することができる。また、仮に、制御方式が開
ループから閉ループに変更される中間区間において、別
の圧力変動が発生しようとしても、この圧力変動は、中
間区間において制御射出圧力の所定目標値を設定目標値
に可及的に近似させて設定しておくことにより、有効に
抑止して安定化させることができる。
As described above, the pressure-holding process control method for an injection molding machine according to the present invention detects the injection speed in the filling process and compares the detected value with a preset reference target value. The injection speed is closed-loop controlled, the injection pressure in the pressure-holding step is detected, and the detection value is compared with a preset reference target value to perform the closed-loop control of the injection pressure. In the pressure process control method, the injection pressure is open-loop controlled in the initial section until the injection speed reaches a predetermined target value after passing the switching point from the filling process to the pressure holding process, and when the target value of this injection speed is reached. The target value of the corresponding injection pressure is set, the intermediate section in which the injection pressure is closed-loop controlled so that the injection pressure becomes the predetermined target value, and the injection pressure becomes the set target value. Thus, even if there is a large deviation between the detected value of injection pressure and the set target value at the holding pressure switching point, the pressure fluctuation due to this deviation is Since the control method is an open loop in the initial section of the process, it can be effectively suppressed. Further, even if another pressure fluctuation is attempted to occur in the intermediate section where the control system is changed from the open loop to the closed loop, this pressure fluctuation allows the predetermined target value of the control injection pressure to be the set target value in the intermediate section. By setting them as close as possible, it is possible to effectively suppress and stabilize.

【0024】このように、本発明によれば、充填工程か
ら保圧工程への切換点を含む保圧工程における圧力変動
を、有効に抑止することができるので、成形製品の品質
を大幅に向上させることができる。
As described above, according to the present invention, it is possible to effectively suppress the pressure fluctuation in the pressure-holding process including the switching point from the filling process to the pressure-holding process, so that the quality of the molded product is significantly improved. Can be made.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明に係る射出成形機の保圧工程制御方法を
実施する装置の一実施例を示す制御回路図である。
FIG. 1 is a control circuit diagram showing an embodiment of an apparatus for carrying out a pressure-holding process control method for an injection molding machine according to the present invention.

【図2】図1に示す制御回路によって達成される射出速
度および射出圧力の特性を示す波形図である。
FIG. 2 is a waveform diagram showing characteristics of injection speed and injection pressure achieved by the control circuit shown in FIG.

【図3】図2に示す射出速度および射出圧力の特性波形
図の要部拡大説明図である。
FIG. 3 is an enlarged explanatory view of a main part of the characteristic waveform diagram of the injection speed and the injection pressure shown in FIG.

【符号の説明】[Explanation of symbols]

10 可変容量ポンプ 12 流量調整弁 14 方向切換弁 16 射出成形機 16a シリンダ 16b スクリュ 18 射出圧力検出器 20 射出速度検出器 22 位置検出器 24 圧力調整弁 30 コントローラ 32 目標値設定器 34 比較演算器 10 Variable Capacity Pump 12 Flow Rate Control Valve 14 Directional Change Valve 16 Injection Molding Machine 16a Cylinder 16b Screw 18 Injection Pressure Detector 20 Injection Speed Detector 22 Position Detector 24 Pressure Adjustment Valve 30 Controller 32 Target Value Setter 34 Comparator

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 充填工程における射出速度を検出してこ
の検出値を予め設定した基準目標値と比較することによ
り前記射出速度を閉ループ制御すると共に、保圧工程に
おける射出圧力を検出してこの検出値を予め設定した基
準目標値と比較することにより前記射出圧力を閉ループ
制御するように構成した射出成形機の保圧工程制御方法
において、 充填工程から保圧工程への切換点の通過後に射出速度が
所定の目標値に達するまでの初期区間は射出圧力を開ル
ープ制御し、この射出速度の目標値に達すると対応する
射出圧力の目標値を設定して、射出圧力が前記所定の目
標値となるように射出圧力を閉ループ制御する中間区間
と、さらに射出圧力をそれぞれ設定目標値となるように
閉ループ制御する終期区間とからなることを特徴とする
射出成形機の保圧工程制御方法。
1. The injection speed in the filling step is detected and the detected value is compared with a preset reference target value to control the injection speed in a closed loop, and the injection pressure in the pressure holding step is detected to detect the injection speed. In a pressure-holding process control method for an injection molding machine configured to perform a closed-loop control of the injection pressure by comparing a value with a preset reference target value, an injection speed after passing a switching point from a filling process to a pressure-holding process. In the initial section until the target value reaches a predetermined target value, the injection pressure is controlled in an open loop, and when the target value of the injection speed is reached, a corresponding target value of the injection pressure is set so that the injection pressure is equal to the predetermined target value. So that the injection pressure is closed-loop controlled so that the injection pressure is set to a set target value. Dwelling step as the control method of the machine.
【請求項2】 前記中間区間からタイマを作動させて、
このタイマにより設定される所定の遅延時間後に、前記
終期区間とすることを特徴とする請求項1記載の射出成
形機の保圧工程制御方法。
2. A timer is operated from the intermediate section,
2. The pressure-holding process control method for an injection molding machine according to claim 1, wherein the final period is set after a predetermined delay time set by the timer.
JP09437996A 1996-04-16 1996-04-16 Method for controlling pressure-holding process of injection molding machine Expired - Lifetime JP3299112B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP09437996A JP3299112B2 (en) 1996-04-16 1996-04-16 Method for controlling pressure-holding process of injection molding machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP09437996A JP3299112B2 (en) 1996-04-16 1996-04-16 Method for controlling pressure-holding process of injection molding machine

Publications (2)

Publication Number Publication Date
JPH09277329A true JPH09277329A (en) 1997-10-28
JP3299112B2 JP3299112B2 (en) 2002-07-08

Family

ID=14108689

Family Applications (1)

Application Number Title Priority Date Filing Date
JP09437996A Expired - Lifetime JP3299112B2 (en) 1996-04-16 1996-04-16 Method for controlling pressure-holding process of injection molding machine

Country Status (1)

Country Link
JP (1) JP3299112B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20030061618A (en) * 2002-01-15 2003-07-22 엘지전선 주식회사 Clamping compression control method
JP2012245716A (en) * 2011-05-30 2012-12-13 Sodick Plastech Co Ltd Control method of injection molding machine
JP2016159589A (en) * 2015-03-04 2016-09-05 ファナック株式会社 Pressure control device for injection molding machine

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5815646B2 (en) 2013-11-15 2015-11-17 ファナック株式会社 Control device for injection molding machine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20030061618A (en) * 2002-01-15 2003-07-22 엘지전선 주식회사 Clamping compression control method
JP2012245716A (en) * 2011-05-30 2012-12-13 Sodick Plastech Co Ltd Control method of injection molding machine
JP2016159589A (en) * 2015-03-04 2016-09-05 ファナック株式会社 Pressure control device for injection molding machine
US10513071B2 (en) 2015-03-04 2019-12-24 Fanuc Corporation Pressure controller for injection molding machine

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