JPS62198426A - Dwell control system of motor-driven injection molding machine - Google Patents
Dwell control system of motor-driven injection molding machineInfo
- Publication number
- JPS62198426A JPS62198426A JP3899286A JP3899286A JPS62198426A JP S62198426 A JPS62198426 A JP S62198426A JP 3899286 A JP3899286 A JP 3899286A JP 3899286 A JP3899286 A JP 3899286A JP S62198426 A JPS62198426 A JP S62198426A
- Authority
- JP
- Japan
- Prior art keywords
- value
- screw
- pressure
- rotation speed
- deviation
- 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.)
- Pending
Links
- 238000001746 injection moulding Methods 0.000 title claims description 6
- 238000000034 method Methods 0.000 claims abstract description 16
- 238000002347 injection Methods 0.000 claims abstract description 10
- 239000007924 injection Substances 0.000 claims abstract description 10
- 239000000284 extract Substances 0.000 claims 1
- 238000001514 detection method Methods 0.000 abstract description 8
- 239000011347 resin Substances 0.000 description 7
- 229920005989 resin Polymers 0.000 description 7
- 230000008602 contraction Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005429 filling process Methods 0.000 description 2
- 230000036316 preload Effects 0.000 description 2
- 240000007612 Dischidia nummularia Species 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】 （イ）産業上の利用分野 本発明は電動射出成形機の保圧制御方式に関する。[Detailed description of the invention] (b) Industrial application field The present invention relates to a pressure holding control system for an electric injection molding machine.
（ロ）従来の技術
射出成形機においては、スクリュを回転させ樹脂をスク
リュ前方に押し出して射出シリンダ内に蓄える計量工程
と、スクリュを前進させ樹脂を金型内に射出する充填工
程とが繰り返される。そのうち充填工程はスクリュ前進
速度を制御する射出工程と、樹脂がほぼ充填した後のス
クリュ前進推力を制御する保圧工程とに分れる。(b) Conventional technology In an injection molding machine, a metering process in which the screw is rotated to push out the resin in front of the screw and stored in the injection cylinder, and a filling process in which the screw is advanced and the resin is injected into the mold are repeated. . The filling process is divided into an injection process that controls the forward speed of the screw, and a pressure holding process that controls the forward thrust of the screw after the resin is almost filled.
この保圧工程における制御方式として、ｆｔ動式の場合
、電機子電流を一定に保つことにょリモータ出力トルク
従ってスクリュ前進推力を一定に保つオープンループ制
御方式と、スクリュ前進推力を圧力検出器で検出してフ
ィードバックすることによりスクリュ前進推力を一定に
保つフィードバック制御方式とが知られている。In the case of the FT type, the control method for this pressure holding process is an open-loop control method that keeps the armature current constant, thereby keeping the remoter output torque and therefore the screw forward thrust constant, and a pressure detector that detects the screw forward thrust. A feedback control method is known in which the forward thrust of the screw is kept constant by feeding back the forward thrust of the screw.
しかし、従来のフィードバック制御方式による保圧制御
は、荷重計により検出された圧力のみをフィードバック
する方式であったため、保圧制御が良好に行なわれない
問題点があった。即ち、保圧制御中には樹脂は徐々に収
縮するため、スクリュを少しずつ前進させる必要がある
。一方１機械系には摩擦力による駆動損失が存在する。However, since the pressure holding control using the conventional feedback control method is a method in which only the pressure detected by the load meter is fed back, there is a problem that the pressure holding control is not performed satisfactorily. That is, since the resin gradually contracts during pressure holding control, it is necessary to advance the screw little by little. On the other hand, in a mechanical system, there is a driving loss due to frictional force.
保圧制御中に樹脂の収縮による圧力低下は荷重計により
検出されて設定値にフィードバックされ、スクリュ前進
用のサーボモータの出力トルクは上昇する。During pressure holding control, a pressure drop due to resin contraction is detected by a load meter and fed back to the set value, and the output torque of the servo motor for advancing the screw increases.
ところが、摩擦力のためサーボモータはトルクが上昇し
てもすぐには回転しない。サーボモータは。However, due to frictional force, the servo motor does not rotate immediately even if the torque increases. The servo motor.
出力トルクが摩擦力に相当する分だけ上昇した時に初め
て回転し、スクリュを前進させ圧力を補正しようとする
。しかし、動摩擦は静摩擦より小さい。このため、スク
リュが動き出すとサーボモータの出力トルクは過剰とな
り、スクリュは前進し過ぎて目標値を越えて止まる。樹
脂が収縮する間、また圧力は下がり上記の動作を繰り返
す、このため、保圧は一定にならず目標値に対してハン
チングする問題点があった。It rotates only when the output torque increases by an amount equivalent to the frictional force, moving the screw forward and attempting to compensate for the pressure. However, kinetic friction is smaller than static friction. Therefore, when the screw starts moving, the output torque of the servo motor becomes excessive, and the screw advances too far and stops after exceeding the target value. While the resin contracts, the pressure decreases and the above-described operation is repeated, which causes the problem that the holding pressure is not constant and hunts relative to the target value.
（ハ）発明が解決しようとする問題点
本発明は上記従来の問題点を解消して、保圧を一定に制
御し得る制御方式を提供することを目的とする。(c) Problems to be Solved by the Invention It is an object of the present invention to solve the above-mentioned conventional problems and provide a control system that can control the holding pressure to a constant level.
（ニ）問題点を解決するための手段
本発明は、荷重計により検出される圧力の他、スクリュ
前進用サーボモータの回転数を回転数検出器により検出
し、これをフィードバックするマイナーフィードバック
ループを設けるようにしたことを特徴とする。(d) Means for solving the problem The present invention detects the rotation speed of the servo motor for advancing the screw by a rotation speed detector in addition to the pressure detected by the load meter, and provides a minor feedback loop that feeds back the detected rotation speed of the servo motor for advancing the screw. It is characterized in that it is provided.
（ホ）作用
保圧フィードバック制御装置に回転数をフィードバック
制御するマイナーフィードバックループを設け、そこに
保圧の目標値と検出値との圧力偏差をＰ’Ｄ（比例・微
分）演算した値を回転数指令値として加えるようにした
ので、圧力偏差が生じれば直ちに大きな回転数指令値が
生じてサーボモータを回転させスクリュを前進させると
共に、スクリュ前進後のサーボモータの回転数は圧力偏
差に応じた値となり、スクリュを前進し過ぎることなく
制御して、常に目標値通りの保圧が得られるようになる
。(E) A minor feedback loop is provided in the action holding pressure feedback control device to feedback control the rotation speed, and the value calculated by P'D (proportional/derivative) of the pressure deviation between the target holding pressure value and the detected value is used for rotation. Since it is added as a numerical command value, if a pressure deviation occurs, a large rotation speed command value is immediately generated to rotate the servo motor and move the screw forward, and the rotation speed of the servo motor after the screw advances will depend on the pressure deviation. This makes it possible to control the screw without moving it too far forward, and to always obtain the holding pressure at the target value.
（へ）実施例 以下、本発明の詳細な説明する。(f) Example The present invention will be explained in detail below.
第１図は本発明の一実施例に係る射出装置を示し、ハウ
ジング１の外側にはスクリュ前後進用サーボモータ２お
よびスクリュ回転用ブレーキ付きサーボモータ３が設け
られる。また、ハウジング１内にはスクリュ４が前後進
移動９回転可能に突出して設けられる。そのスクリュ４
はスクリュねじ軸５とトルク伝達可能に結合されており
、スクリュねじ軸５はスプライン軸６と一体構成となっ
ている。FIG. 1 shows an injection device according to an embodiment of the present invention, in which a servo motor 2 for forward and backward movement of a screw and a servo motor 3 with a brake for rotation of the screw are provided on the outside of a housing 1. Further, a screw 4 is provided in the housing 1 so as to protrude from the housing 1 so as to be capable of forward and backward movement and nine rotations. that screw 4
is connected to the screw shaft 5 so as to be able to transmit torque, and the screw shaft 5 is integrally formed with the spline shaft 6.
ハウジング１内において、スクリュ前後進用サーボモー
タ２の軸２′に取り付けられた第１段目の歯車７は第２
段目の歯車即ちスクリュ前後進用歯車８と噛合し、この
第２段目の歯車８はねじナツト９と一体化し、更にこの
ねじナツト９はスクリュねじ軸５と螺合している。また
、第２段目の歯車８はナツトハウジング１０と一体構成
となって軸受１１，１２でハウジング１に回転自在に支
持されている。この場合、軸受１１は軸方向に滑動可能
なようにハウジング１に対して遊合されている。Inside the housing 1, the first stage gear 7 attached to the shaft 2' of the servo motor 2 for forward and backward movement of the screw is connected to the second stage gear 7.
It meshes with the gear of the second stage, that is, the gear 8 for forward and backward movement of the screw, and the gear 8 of the second stage is integrated with a screw nut 9, which in turn is threadedly engaged with the screw shaft 5. Further, the second stage gear 8 is integrally constructed with the nut housing 10 and is rotatably supported by the housing 1 by bearings 11 and 12. In this case, the bearing 11 is loosely coupled to the housing 1 so as to be able to slide in the axial direction.
また、ハウジング１内において、スクリュ回転用のブレ
ーキ付きサーボモータ３の軸３′に取り付けられた第１
段目の歯車１３は第２段目の歯車１４即ちスクリュ回転
用歯車１４と噛合している。この第２段目の歯車１４は
、前記スプライン軸６と嵌合するスプライン溝部１５と
筒状部１６を備える。スプライン軸６は前記歯車１４と
一体的に回転すると共に。In addition, within the housing 1, a first
The gear 13 in the second stage meshes with the gear 14 in the second stage, that is, the gear 14 for rotating the screw. This second-stage gear 14 includes a spline groove portion 15 that fits into the spline shaft 6 and a cylindrical portion 16 . The spline shaft 6 rotates integrally with the gear 14.
歯車１４の筒状部１６内を前後進移動可能になっており
、歯車１４の回転と共にスクリュ４も回転する。The gear 14 is movable back and forth within the cylindrical portion 16, and the screw 4 also rotates as the gear 14 rotates.
この第２段目の歯車１４は軸受１７，１８とで回転可能
に支持される。This second stage gear 14 is rotatably supported by bearings 17 and 18.
ハウジング１内面にリング状に突出形成したギヤボック
ス隔壁１９と、第２段目の歯車即ちスクリュ前後進用歯
車８との間に軸受２０．ベアリング押さえ２１を介して
ロードセルなどの荷重計２２を設けている。この荷重計
２２はリング状のものにストレインゲージを貼り付けた
もの、あるいは数個のブロックにストレインゲージを貼
り付けたものが用いられる。図中、２３は軸受ナツト、
２４は軸受ワッシャである。また、スクリュ前後進用サ
ーボモータ２の回転軸には回転数検出器２５が連結され
ている。A bearing 20. A load meter 22 such as a load cell is provided via a bearing holder 21. The load cell 22 is a ring-shaped device with a strain gauge attached to it, or a strain gauge attached to several blocks. In the figure, 23 is a bearing nut,
24 is a bearing washer. Further, a rotation speed detector 25 is connected to the rotating shaft of the servo motor 2 for forward and backward movement of the screw.
上記射出装置において、射出圧もしくはスクリュ背圧は
、スクリュ４→スクリユねじ軸５→ねじナツト９→スク
リュ前後進用歯車８→軸受け２０→ベアリング押さえ２
１→荷重機２２へと伝わる。In the above injection device, the injection pressure or screw back pressure is as follows: screw 4→screw screw shaft 5→screw nut 9→screw forward and backward movement gear 8→bearing 20→bearing retainer 2
1 → transmitted to the loading machine 22.
安定なフィードバック制御を行なうためには、スクリュ
４にかかる正方向（押し方向）の力も負方向（引き方向
）の力も確実に荷重計２２に伝える必要があり、そのた
めにはスクリュ４から荷重計２２に至る各部材にガタが
あってはならない。特に、スクリュ前後進用歯車８．軸
受け２０．ベアリング押さえ２１、荷重計２２間にガタ
（隙間）が生じ易い。このガタをなくすため、ハウジン
グ１０の右端部外周にねじを切り軸受ワッシャ２４を挿
入し、軸受ナツト２３で締め付け、荷重計２２に予圧を
与えている。軸受ナツト２３を締め付けるとハウジング
１０は図の右方向へ移動し、それにつれてスクリュ前後
進用歯車８が右へ移動するので軸受け２０．ベアリング
押さえ２１が右へ移動し荷重計２２は左端より力を受け
る。In order to perform stable feedback control, it is necessary to reliably transmit both the positive direction (pushing direction) force and the negative direction (pulling direction) force applied to the screw 4 to the load cell 22. There must be no looseness in each member leading up to. Particularly, gear 8 for forward and backward movement of the screw. Bearing 20. Play (gap) is likely to occur between the bearing retainer 21 and the load cell 22. In order to eliminate this looseness, a thread is cut on the outer periphery of the right end of the housing 10 and a bearing washer 24 is inserted, which is tightened with a bearing nut 23 to apply a preload to the load cell 22. When the bearing nut 23 is tightened, the housing 10 moves to the right in the figure, and the screw forward and backward movement gear 8 moves to the right, so that the bearing 20. The bearing presser 21 moves to the right, and the load cell 22 receives force from the left end.
また、軸受ナツト２３の反力は軸受ワッシャ２４を左へ
押し、軸受け１２を左へ押す。軸受け１２の押圧力はギ
ヤボックス隔壁１９に伝わるが、荷重計２２の右端もギ
ヤボックス隔壁１９に接しているため、結果として荷重
計２２は左右両端より軸受ナツト２３の締め付は力に等
しい予圧が与えられている。Further, the reaction force of the bearing nut 23 pushes the bearing washer 24 to the left and pushes the bearing 12 to the left. The pressing force of the bearing 12 is transmitted to the gear box bulkhead 19, but since the right end of the load cell 22 is also in contact with the gear box bulkhead 19, as a result, the load cell 22 has a preload equal to the force when tightening the bearing nut 23 from both left and right ends. is given.
第２図は荷重計２２で一保圧を検出する一方５回転数検
出器２５でサーボモータ２の回転数を検出して保圧フィ
ードバック制御を行なう制御回路ブロック図を示したも
のである。図中、２６は保圧設定器。FIG. 2 is a block diagram of a control circuit in which the load cell 22 detects one holding pressure, and the five rotational speed detector 25 detects the rotational speed of the servo motor 2 to perform holding pressure feedback control. In the figure, 26 is a holding pressure setting device.
２７ 、２９は加減演算器、２８は加減演算器２７から
の圧力偏差ＣをＰＤ（比例・微分）演算して回転数指令
値ｄを出力する保圧調節計、３０は加減演算器２９から
の回転数偏差ｆをＰＩＤ（比例・積分・微分）演算して
トルク指令値ｇを出力する速度調節計、３１は入力する
トルク指令値ｇに応じたサーボモータ２の電機子電流を
流しモータ出力トルクを制御するサーボモータ用アンプ
、３２は回転数検出用増幅器、３３は荷重計用増幅器で
ある。27 and 29 are addition/subtraction calculators; 28 is a pressure-holding regulator that calculates the pressure deviation C from the addition/subtraction calculator 27 using PD (proportional/differential) and outputs a rotational speed command value d; 30 is a pressure deviation calculator from the addition/subtraction calculator 29; A speed controller that calculates the rotation speed deviation f by PID (proportional, integral, differential) and outputs a torque command value g, 31 is a motor output torque that flows the armature current of the servo motor 2 according to the input torque command value g. 32 is an amplifier for detecting the rotational speed, and 33 is an amplifier for the load cell.
以上の構成で、保圧の目標値ａは保圧設定値２６より与
えられる。スクリュ４にかかる射出圧は荷重計２２によ
り検出され、荷重計用増幅器３３で増幅されて保圧検出
値すとなる。保圧の目標値ａと検出値すは加減演算器２
７で偏差が演算され、その保圧偏差値Ｃは保圧調節計２
８でＰＤ演算されて回転数指令値ｄとなり、マイナーフ
ィードバックループ３４に加え、られる。With the above configuration, the holding pressure target value a is given by the holding pressure set value 26. The injection pressure applied to the screw 4 is detected by the load cell 22, and is amplified by the load cell amplifier 33 to provide a holding pressure detection value. The holding pressure target value a and the detected value are addition/subtraction calculator 2
The deviation is calculated in step 7, and the holding pressure deviation value C is calculated by the holding pressure controller 2.
8, the rotation speed command value d is calculated and added to the minor feedback loop 34.
マイナーフィードバックループ３４では５回転数検出器
２５で検出されたサーボモータ２の回転数が回転数検出
用増幅器３２で増幅されて回転数検出値ｅとなり、加減
演算器２９で回転数指令値ｄとの偏差［が演算される。In the minor feedback loop 34, the rotation speed of the servo motor 2 detected by the rotation speed detector 25 is amplified by the rotation speed detection amplifier 32 to become the rotation speed detection value e, and the rotation speed command value d is determined by the addition/subtraction calculator 29. The deviation [is calculated.
この回転数偏差ｆは速度調節計３０でＰＩＤ演算されて
トルク指令値ｇとなり、サーボモータ用アンプ３１に入
力され、そのトルク指令値ｇに応した電機子電流がサー
ボモータ２に流れ、スクリュ４の前進推力制御即ち検力
制御が行なわれる。This rotational speed deviation f is PID-calculated by the speed controller 30 to become a torque command value g, which is input to the servo motor amplifier 31, and an armature current corresponding to the torque command value g flows to the servo motor 2, and the screw 4 Forward thrust control, that is, force detection control is performed.
この制御方式によれば、保圧工程において、樹脂の収縮
により圧力が下った場合、この圧力低下は直ちに荷重計
２２により検出されて荷重計用増幅器３３を介して加減
演算器２７にフィードバックされ、保圧偏差Ｃとなって
現われる。すると、保圧調節計２８はＰＤ演算により偏
差が生じた瞬間だけ大きな値をとり、後は偏差に比例す
る値を回転数指令値ｄとしてマイナーフィードバックル
ープ３４に加える。マイナーフィードバックループ３４
では、この回転数指令値ｄに応じてサーボモータ２を回
転数制御する結果、保圧偏差Ｃが生じると瞬時にサーボ
モータ２が回転しスクリュ４を前進させる。回転後はサ
ーボモータ２の回転数も保圧偏差Ｃに比例した値になり
、行き過ぎることなく精度良く目標値に追従して圧力を
補正する。According to this control method, in the pressure holding process, when the pressure drops due to contraction of the resin, this pressure drop is immediately detected by the load cell 22 and fed back to the addition/subtraction calculator 27 via the load cell amplifier 33. This appears as a holding pressure deviation C. Then, the holding pressure regulator 28 takes a large value only at the moment when a deviation occurs due to the PD calculation, and thereafter adds a value proportional to the deviation to the minor feedback loop 34 as the rotational speed command value d. Minor feedback loop 34
Now, as a result of controlling the rotation speed of the servo motor 2 according to the rotation speed command value d, when a holding pressure deviation C occurs, the servo motor 2 instantly rotates to advance the screw 4. After the rotation, the rotation speed of the servo motor 2 also becomes a value proportional to the holding pressure deviation C, and the pressure is corrected by accurately following the target value without overshooting.
（ト）発明の効果
以上のように本発明によれば、荷重計による圧力フィー
ドバック制御に加えて、サーボモータの回転数もフィー
ドバックするマイナーフィードバックループを設けるよ
うにしたので、保圧工程中の樹脂の収縮による圧力変化
に対する補正は迅速に行なわれてハンチングもなく目標
値に対する追従性の良い保圧制御が行なわれる。(G) Effects of the Invention As described above, according to the present invention, in addition to the pressure feedback control using the load cell, a minor feedback loop is provided that also feeds back the rotation speed of the servo motor. Correction for pressure changes due to contraction is quickly performed, and pressure holding control with good followability to the target value is performed without hunting.
第１図は本発明の一実施例に係る射出装置の断面図、第
２図はその射出装置における制御回路のブロック図であ
る。
２・・・スクリュ前後進用サーボモータ、４・・・スク
リュ、５・・・スクリュねじ軸、７，８・・・歯車、２
６・・・保圧設定値、２７．２９・・・加減演算器、２
８・・・保圧調節計、３０・・・速度調節計、３１・・
・サーボモータ用アンプ、３２・・・回転数検出用増幅
器、３３・・・荷重計用増幅器、３４・・・マイナーフ
ィードバックループ。FIG. 1 is a sectional view of an injection device according to an embodiment of the present invention, and FIG. 2 is a block diagram of a control circuit in the injection device. 2... Servo motor for screw forward and backward movement, 4... Screw, 5... Screw screw shaft, 7, 8... Gear, 2
6... Holding pressure set value, 27.29... Addition/subtraction calculator, 2
8... Holding pressure controller, 30... Speed controller, 31...
- Amplifier for servo motor, 32... Amplifier for rotation speed detection, 33... Amplifier for load cell, 34... Minor feedback loop.
Claims (1)
ることにより保圧工程時のスクリュ前進推力を一定に制
御する電動射出成形機の保圧制御方式において、射出圧
検出用荷重計を設けて保圧を検出し目標値との偏差を算
出して保圧調節計に加え回転数指令値を取り出す保圧フ
ィードバック制御回路と、サーボモータ回転数検出器を
設けて回転数を検出し前記回転数指令値との偏差を算出
して速度調節計に加えその出力に応じてサーボモータの
回転数を制御する回転数マイナーフィードバック制御回
路とを備えて成ることを特徴とする電動射出成形機の保
圧制御方式。In the pressure holding control method of electric injection molding machines, which controls the forward thrust of the screw during the pressure holding process at a constant level by advancing the injection molding screw using a servo motor, a load meter for detecting injection pressure is installed to control pressure holding. A pressure feedback control circuit that detects the rotation speed, calculates the deviation from the target value, and extracts the rotation speed command value in addition to the pressure adjustment controller, and a servo motor rotation speed detector to detect the rotation speed and calculate the rotation speed command value. A pressure holding control method for an electric injection molding machine characterized by comprising a speed controller and a rotation speed minor feedback control circuit that calculates the deviation from the speed controller and controls the rotation speed of a servo motor according to the output of the speed controller. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3899286A JPS62198426A (en) | 1986-02-26 | 1986-02-26 | Dwell control system of motor-driven injection molding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3899286A JPS62198426A (en) | 1986-02-26 | 1986-02-26 | Dwell control system of motor-driven injection molding machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62198426A true JPS62198426A (en) | 1987-09-02 |
Family
ID=12540629
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3899286A Pending JPS62198426A (en) | 1986-02-26 | 1986-02-26 | Dwell control system of motor-driven injection molding machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62198426A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03178416A (en) * | 1989-12-07 | 1991-08-02 | Niigata Eng Co Ltd | Method and apparatus for controlling injection and dwelling of motorized injection molder |
| WO1992013701A1 (en) * | 1991-02-06 | 1992-08-20 | Fanuc Ltd | Method of controlling motor driven injection molding machine |
| JPH04244824A (en) * | 1991-01-30 | 1992-09-01 | Fanuc Ltd | Dwell control method in electric injection molding machine |
| JP4110365B2 (en) * | 2000-02-07 | 2008-07-02 | 株式会社名機製作所 | Injection molding machine |
-
1986
- 1986-02-26 JP JP3899286A patent/JPS62198426A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03178416A (en) * | 1989-12-07 | 1991-08-02 | Niigata Eng Co Ltd | Method and apparatus for controlling injection and dwelling of motorized injection molder |
| JPH0544892B2 (en) * | 1989-12-07 | 1993-07-07 | Niigata Engineering Co Ltd | |
| JPH04244824A (en) * | 1991-01-30 | 1992-09-01 | Fanuc Ltd | Dwell control method in electric injection molding machine |
| WO1992013701A1 (en) * | 1991-02-06 | 1992-08-20 | Fanuc Ltd | Method of controlling motor driven injection molding machine |
| JPH04249129A (en) * | 1991-02-06 | 1992-09-04 | Fanuc Ltd | Injection, dwell pressure and back pressure control method for motorized injection molding machine |
| US5342559A (en) * | 1991-02-06 | 1994-08-30 | Fanuc Ltd. | Method of controlling electrically operated injection molding machine |
| JP4110365B2 (en) * | 2000-02-07 | 2008-07-02 | 株式会社名機製作所 | Injection molding machine |
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