JPH02141221A - Control of injection molding machine - Google Patents
Control of injection molding machineInfo
- Publication number
- JPH02141221A JPH02141221A JP29649388A JP29649388A JPH02141221A JP H02141221 A JPH02141221 A JP H02141221A JP 29649388 A JP29649388 A JP 29649388A JP 29649388 A JP29649388 A JP 29649388A JP H02141221 A JPH02141221 A JP H02141221A
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- injection
- resin
- plunger
- speed
- 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 16
- 238000000034 method Methods 0.000 claims abstract description 88
- 238000002347 injection Methods 0.000 claims abstract description 52
- 239000007924 injection Substances 0.000 claims abstract description 52
- 239000011347 resin Substances 0.000 claims abstract description 29
- 229920005989 resin Polymers 0.000 claims abstract description 29
- 230000003247 decreasing effect Effects 0.000 abstract 2
- 238000013459 approach Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 101100243724 Caenorhabditis elegans pgp-3 gene Proteins 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
- B29K2995/0037—Other properties
- B29K2995/0063—Density
Landscapes
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
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、特に電動式射出成形機の制御方法
に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an injection molding machine, particularly to a method for controlling an electric injection molding machine.
従来の技術
電動式射出成形機において、射出工程、射出工程から保
圧工程への切換え及び保圧工程の制御は、例えば第４図
（ａ）、（ｂ）、（Ｃ）に示すような方法で行われてい
た。即ち、射出工程では予め適宜設定された所定の速度
で樹脂を射出するように制御し、保圧工程では時間の経
過とともに複数段階に設定された圧力Ｐ１〜Ｐ４を保持
するように圧力制御し、かつこれら射出工程から保圧工
程への切換えは、射出工程の最終段階で圧力が上昇して
保圧工程の初期設定圧、即ち樹脂充填圧に達すると、こ
れを圧力センサで検出し、モータに逆電流を流して制動
をかけ、射出を停止して圧力制御に切換えるようにして
いる。Conventional technology In electric injection molding machines, the injection process, switching from the injection process to the pressure holding process, and control of the pressure holding process are performed, for example, by the methods shown in FIGS. 4(a), (b), and (C). It was held in That is, in the injection process, the resin is controlled to be injected at a predetermined speed that is appropriately set in advance, and in the pressure holding process, the pressure is controlled to maintain the pressures P1 to P4 set in multiple stages as time passes, In order to switch from the injection process to the pressure holding process, when the pressure rises at the final stage of the injection process and reaches the initial setting pressure for the pressure holding process, that is, the resin filling pressure, this is detected by a pressure sensor and the motor is activated. A reverse current is applied to apply braking, stopping injection and switching to pressure control.
又、射出工程から保圧工程への切換え方法としては、射
出工程終了、即ち樹脂の充填が完了するスクリュー又は
プランジャーの位置を予め設定しておき、スクリュー又
はプランジャーがその位置に達すると保圧工程に切換え
る方法や、射出時間を設定し、その設定時間を経過する
と保圧工程に切換える方法や、これらの方法を組み合わ
せた方法が採用されている。In addition, as a method for switching from the injection process to the pressure holding process, the position of the screw or plunger is set in advance to complete the injection process, that is, the filling of the resin is completed, and when the screw or plunger reaches that position, the A method of switching to a pressure process, a method of setting an injection time and switching to a pressure holding process after the set time has elapsed, and a method of combining these methods have been adopted.
発明が解決しようとする課題
ところが、樹脂充填圧の検出によって保圧工程に切換え
る方法では、高速射出を行っている場合に、機械系及び
モータの慣性によって減速を開始してからモータが止ま
るまでにスクリュー又はプランジ中−が前進し、そのた
めに圧力が上昇し、第４図（Ｃ）に示すようなピーク圧
Ｐが発生し、製品の密度が不安定となるという問題があ
る。Problems to be Solved by the Invention However, with the method of switching to the pressure holding process by detecting the resin filling pressure, when performing high-speed injection, the inertia of the mechanical system and motor causes the inertia of the mechanical system and the motor to cause deceleration to start and the time until the motor stops. There is a problem in that the screw or the plunger moves forward, which causes the pressure to rise, and a peak pressure P as shown in FIG. 4(C) occurs, making the density of the product unstable.
また、スクリュー又はプランジャーの位置又は射出時間
により切換制御する方法の場合も、射出工程中の樹脂の
漏れや設定ミス等によって適正に充填完了時点で保圧工
程への切換えが行われる保証がなく、製品重量のバラツ
キが大きくなるという問題がある。Furthermore, even if switching is controlled by the position of the screw or plunger or the injection time, there is no guarantee that the switch to the holding pressure process will be performed properly when filling is completed due to resin leakage or setting errors during the injection process. , there is a problem that the variation in product weight becomes large.
さらに、保圧工程でも圧力を段階的に変化させているた
めに、硬化過程の樹脂に急激な圧力変化が加わり、製品
の密度分布に悪影響を与えるという問題がある。Furthermore, since the pressure is changed in stages during the pressure holding process, there is a problem in that sudden pressure changes are applied to the resin during the curing process, which adversely affects the density distribution of the product.
本発明は上記従来の問題点に鑑み、製品の密度が安定し
、重量ばらつきの小さい製品を得ることができる射出成
形機の制御方法を提供することを目的とする。SUMMARY OF THE INVENTION In view of the above conventional problems, an object of the present invention is to provide a method for controlling an injection molding machine, which makes it possible to obtain products with stable product density and small weight variations.
課題を解決するための手段
本発明は上記目的を達成するために、射出工程で保圧工
程の初期設定圧力より適当に低く設定された圧力を検出
すると、射出速度を低下させ、その後保圧工程の初期設
定圧力に達すると射出工程から保圧工程に切換えること
を特徴とする。Means for Solving the Problems In order to achieve the above object, the present invention detects a pressure set appropriately lower than the initial setting pressure of the pressure holding process in the injection process, reduces the injection speed, and then performs the pressure holding process. When the initial set pressure is reached, the injection process is switched to the pressure holding process.
また、射出工程で最大トルクを設定した状態で射出速度
を制御し、射出速度が設定値以下になると、これを検出
して保圧工程に切換えてもよい。Alternatively, the injection speed may be controlled with the maximum torque set in the injection process, and when the injection speed becomes equal to or less than the set value, this may be detected and the process may be switched to the pressure holding process.
さらに、保圧工程では圧力を連続的に変化させるのが好
ましい。Furthermore, it is preferable to change the pressure continuously in the pressure holding step.
作 用
本発明によると、保圧工程に切換える圧力より低く設定
された圧力を検出した時点で射出速度を低下させること
によって保圧工程への切換時にモータの減速時間が短く
て済み、ピーク圧が発生しに＜＜、圧力が滑らかに変化
するため、製品の密度が安定する。According to the present invention, by reducing the injection speed when a pressure set lower than the pressure for switching to the pressure holding process is detected, the deceleration time of the motor can be shortened when switching to the pressure holding process, and the peak pressure can be reduced. As the pressure changes smoothly, the density of the product becomes stable.
また、射出工程で最大トルクを設定しておくと、充填完
了状態に近づくと樹脂圧力が上昇して射出速度が急激に
減速するため、この射出速度が設定値以下になった時点
で保圧工程への切換えを行うことにより、切換え時の圧
力変化が滑らかでありかつ正確な充填位置で保圧工程に
切換えることができ、製品の密度が安定するとともに重
量のばらつきもなくなる。In addition, if the maximum torque is set in the injection process, the resin pressure will increase as the filling state approaches completion, and the injection speed will rapidly slow down, so when this injection speed falls below the set value, the pressure holding By switching to , the pressure change at the time of switching is smooth, and the process can be switched to the holding pressure process at an accurate filling position, which stabilizes the density of the product and eliminates variations in weight.
さらに、保圧工程で圧力を型内圧の変化に対応させて連
続的に変化させることによって製品の密度分布を均一に
することができる。Furthermore, the density distribution of the product can be made uniform by continuously changing the pressure in the pressure holding process in response to changes in the mold internal pressure.
実施例
以下、本発明の一実施例を第１図及び第２図に基づいて
説明する。EXAMPLE Hereinafter, an example of the present invention will be described based on FIGS. 1 and 2.
第２図において、■は、プリブラ式射出成形機のシリン
ダであり、その内部に前後移動可能なプランジャー２が
配設されている。このプランジャー２の後部には、連結
部材３を介してガイド６により回転しないようにガイド
されたポールネジナツト５が固定され、このポールネジ
ナツト５にモータ７にて回転駆動可能なボールネジ４が
螺合している。又、プランジャー２の前端部には、略円
錐体状のプランジャーヘッド８が設けられ、その後部に
逆止弁９が配設されている。シリンダ１の前部の樹脂の
貯溜空間１０の前端には型内のキャビティに樹脂を注入
するノズル１１が形成されている。１２は、図示しない
可塑化スクリューにて可塑化された樹脂がシリンダｌ内
に供給される樹脂供給口である。In FIG. 2, ■ is a cylinder of a Pribula injection molding machine, and a plunger 2 that can be moved back and forth is disposed inside the cylinder. A pole screw nut 5 that is guided so as not to rotate by a guide 6 via a connecting member 3 is fixed to the rear part of the plunger 2, and a ball screw 4 that can be rotationally driven by a motor 7 is attached to the pole screw nut 5. They are screwed together. Further, a substantially conical plunger head 8 is provided at the front end of the plunger 2, and a check valve 9 is provided at the rear of the plunger head 8. A nozzle 11 is formed at the front end of a resin storage space 10 at the front of the cylinder 1 for injecting resin into a cavity within the mold. Reference numeral 12 denotes a resin supply port through which resin plasticized by a plasticizing screw (not shown) is supplied into the cylinder l.
１３は、前記モータ７の制御装置で、モータ７の回転軸
に結合されたエンコーダ１４からの信号及び貯溜空間１
０の前端に配置された圧力センサ１５からの信号が入力
されている。この制御装置１３は、モータ７自体の出力
トルク、エンコーダ１４により検出される位置信号から
演算されるプランジャー２の位置及び移動速度、圧力セ
ンサ１５により検出される貯溜空間ｌＯの樹脂圧力等が
所定値となるようにモータ７を駆動制御する。Reference numeral 13 denotes a control device for the motor 7, which receives signals from the encoder 14 coupled to the rotating shaft of the motor 7 and the storage space 1.
A signal from a pressure sensor 15 disposed at the front end of 0 is input. This control device 13 controls the output torque of the motor 7 itself, the position and moving speed of the plunger 2 calculated from the position signal detected by the encoder 14, the resin pressure in the storage space lO detected by the pressure sensor 15, etc. The motor 7 is driven and controlled so that the value is achieved.
次に、射出工程から保圧工程に至る動作を説明する。第
１図に示すように、射出工程では予め設定された速度で
プランジャー２が前進移動するようにモータ７が駆動制
御され、プランジャー２の前進移動に伴って型のキャビ
ティ内に樹脂が充填される。射出工程の最終段階に近づ
くと、樹脂圧力が急激に上昇し始める。この樹脂圧力は
圧力センサ１５にて検出されており、検出圧力が保圧工
程における初期設定圧力ＰＩ、即ち樹脂充填圧よりも適
当に低い値に設定された検出圧力Ｐ、になると、プラン
ジャー２の移動速度を低下させ、低速で射出するように
モータ７が制御される。その結果、圧力上昇は緩やかに
なる。その後、検出圧力が初期設定圧力Ｐ１になると、
モータ７を止めて射出工程を終了する。このとき、予め
プランジャー２の移動速度を低下させているので、機械
系やモータフの慣性による減速時間も短く、ピーク圧を
生ずることなく、滑らかに保圧工程に移行する。Next, the operations from the injection process to the pressure holding process will be explained. As shown in Fig. 1, in the injection process, the motor 7 is driven and controlled so that the plunger 2 moves forward at a preset speed, and as the plunger 2 moves forward, resin is filled into the cavity of the mold. be done. As the final stage of the injection process approaches, resin pressure begins to rise rapidly. This resin pressure is detected by the pressure sensor 15, and when the detected pressure reaches the initial setting pressure PI in the pressure holding process, that is, the detected pressure P is set to a value suitably lower than the resin filling pressure, the plunger 2 The motor 7 is controlled to reduce the moving speed of the injector and inject at a low speed. As a result, the pressure rise becomes gradual. After that, when the detected pressure reaches the initial setting pressure P1,
The motor 7 is stopped to complete the injection process. At this time, since the moving speed of the plunger 2 is lowered in advance, the deceleration time due to the inertia of the mechanical system and motor is short, and the pressure is smoothly shifted to the pressure holding step without generating a peak pressure.
保圧工程では、型内圧の変化に合わせて時間の経過に応
じて設定されている所定圧力Ｐ＋、ＰｇＰ ３ 、Ｐ−
に樹脂圧力が一致するようにモータ７が駆動制御される
。このとき、樹脂圧力をリニアに変化させることによっ
て、急激な樹脂圧力の変化による製品の密度分布のばら
つきを無くし、密度の均一な製品が得られるようにして
いる。具体的には、設定された各時間も、〜ｔ４におけ
る圧力Ｐ１〜Ｐ４からそれらの間の圧力指示データを制
御装置１３内の演算回路により比例分配にて演算して細
かいサンプリング間隔でメモリに保存しておき、このメ
モリ内のデータに対して圧力センサ１５にて検出された
圧力をフィードバックすることより圧力制御を連続的に
行っている。In the pressure holding process, predetermined pressures P+, PgP 3 , P- are set over time according to changes in mold internal pressure.
The motor 7 is driven and controlled so that the resin pressure coincides with the resin pressure. At this time, by linearly changing the resin pressure, variations in the density distribution of the product due to sudden changes in the resin pressure are eliminated, and a product with uniform density can be obtained. Specifically, for each set time, the pressure instruction data between the pressures P1 to P4 at ~t4 is calculated by proportional distribution by the calculation circuit in the control device 13 and stored in the memory at fine sampling intervals. Then, pressure control is continuously performed by feeding back the pressure detected by the pressure sensor 15 to the data in the memory.
このような射出工程及び保圧工程にて成形すると、圧力
変化が滑らかでかつ安定しているため、密度の安定した
製品が得られる。When molding is performed using such an injection process and a pressure holding process, pressure changes are smooth and stable, so a product with stable density can be obtained.
次に、本発明の第２の実施例を第３図に基づいて説明す
る。この実施例では、射出工程においてプランジャー２
の速度を制御するとともに、モータ７の最大トルクＴを
設定している。このトルクＴは、保圧工程の初期設定圧
力Ｐ１に圧力制御するときのトルク値にほぼ対応してい
る。プランジャー２の速度、即ち射出速度は、第３図の
例では、射出工程の前半では高い■、に、後半では低い
■２に設定している。尚、この射出速度は、第１実施例
の場合を含めて任意に設定すればよい。Next, a second embodiment of the present invention will be described based on FIG. In this embodiment, plunger 2 is used in the injection process.
In addition to controlling the speed of the motor 7, the maximum torque T of the motor 7 is set. This torque T approximately corresponds to the torque value when controlling the pressure to the initial setting pressure P1 in the pressure holding process. In the example shown in FIG. 3, the speed of the plunger 2, that is, the injection speed is set to high (2) in the first half of the injection process, and low (2) in the second half. Note that this injection speed may be set arbitrarily including the case of the first embodiment.
射出工程が最終段階に近づくと、型のキャビティ内に樹
脂がほぼ充填されているため樹脂圧力が高くなるが、一
方でモータ７の最大トルクが設定されているために射出
圧力は一定以上に高くならず、その結果射出速度が急激
に低下する。そこで射出速度が予め非常に低い値に設定
された射出速度■ゎより低くなったときに、射出工程か
ら保圧工程に切換え、上記第１実施例と同様に圧力制御
を行う。As the injection process approaches the final stage, the resin pressure increases because the mold cavity is almost filled with resin, but on the other hand, the injection pressure is higher than a certain level because the maximum torque of the motor 7 is set. As a result, the injection speed decreases rapidly. Therefore, when the injection speed becomes lower than the injection speed ゎ which has been set to a very low value in advance, the injection process is switched to the pressure holding process and pressure control is performed in the same manner as in the first embodiment.
本発明は上記実施例に限定されるものではなく、例えば
上記実施例ではプリブラ式射出成形機に適用した例を示
したが、プランジャー式やスクリューインライン式射出
成形機にも同様に通用できることは言うまでもない。The present invention is not limited to the above-mentioned embodiments. For example, although the above-mentioned embodiments show an example in which the present invention is applied to a Pribula type injection molding machine, it can be similarly applied to a plunger type or screw in-line type injection molding machine. Needless to say.
発明の効果
本発明の射出成形機の制御方法によれば、以」二の説明
から明らかなように、保圧工程に切換える圧力より低く
設定された圧力を検出した時点で射出速度を低下させる
ことによって保圧工程への切換時にモータの減速時間が
短くて済んでピーク圧が発生せず、圧力が滑らかに変化
するため、製品の密度が安定する。Effects of the Invention According to the injection molding machine control method of the present invention, as is clear from the following explanation, the injection speed can be reduced when a pressure set lower than the pressure for switching to the pressure holding process is detected. Therefore, when switching to the pressure holding process, the motor deceleration time is short, no peak pressure is generated, and the pressure changes smoothly, so the density of the product is stabilized.
又、射出工程で最大トルクを設定しておくと、充填完了
状態に近づくと樹脂圧力が上昇して射出速度が急激に減
速するため、この射出速度が設定値以下になった時点で
保圧工程への切換えを行うことにより、切換え時の圧力
変化が滑らかでかつ正確な充填位置で切換制御でき、製
品の密度が安定するとともに製品重量のばらつきもなく
なる。In addition, if the maximum torque is set in the injection process, the resin pressure will increase as the filling state approaches completion and the injection speed will rapidly slow down, so when the injection speed falls below the set value, the pressure holding process will start. By switching to , the pressure change at the time of switching is smooth and the switching can be controlled at an accurate filling position, and the density of the product is stabilized and variations in product weight are eliminated.
ざらに、保圧工程で圧力を型内圧の変化に対応させて連
続的に変化させることによって製品の密度分布を均一に
することができる等、製品の密度を安定させ、重量ばら
つきの小さい製品を得るのに大なる効果を発揮する。In general, by continuously changing the pressure in the pressure holding process in response to changes in the mold internal pressure, it is possible to make the density distribution of the product uniform, thereby stabilizing the density of the product and producing products with small weight variations. It has a great effect on obtaining.
第１図及び第２図は本発明の第１実施例を示し、第１図
（ａ）、（ｂ）、（Ｃ）はそれぞれ射出・保圧工程にお
ける工程、プランジャーの速度変化及び圧力変化のタイ
ミングチャート、第２図は射出成形機の概略構成図、第
３図（ａ）、（ｂ）、（Ｃ）、（ｄ）はそれぞれ本発明
の第２実施例の射出・保圧工程における工程トルク及び
圧力の指令値、プランジャーの速度変化及び圧力変化の
タイミングチャート、第４図（ａ）、（ｂ）、（Ｃ）は
従来例の射出・保圧工程における工程、プランジャーの
速度変化及び圧力変化のタイミングチャートである。
１・・・・・・シリンダ、２・・・・・・プランジャー
７・・・・・・モータ、１０・・・・・・貯溜空間、
１３・・・・・・制御装置、１４・・・・・・エンコー
ダ、１５・・・・・・圧力センサ。
代理人 弁理士 粟野 重厚 ほか１基環
図
１つ−“圧力づンづ1 and 2 show a first embodiment of the present invention, and FIGS. 1(a), (b), and (C) show steps in the injection/pressure holding process, plunger speed changes, and pressure changes, respectively. FIG. 2 is a schematic diagram of the injection molding machine, and FIGS. 3(a), (b), (C), and (d) are timing charts of the injection molding machine in the second embodiment of the present invention. Process torque and pressure command values, timing charts of plunger speed changes and pressure changes, Figures 4 (a), (b), and (C) show steps and plunger speeds in conventional injection and pressure holding processes. It is a timing chart of change and pressure change. 1...Cylinder, 2...Plunger 7...Motor, 10...Storage space,
13...control device, 14...encoder, 15...pressure sensor. Agent: Patent attorney Shigeyuki Awano and 1 ring diagram - “Pressure Tsunzu”
Claims (3)
ーで金型内に射出する射出成形機の制御方法において、
射出工程で保圧工程の初期設定圧力より適当に低く設定
された圧力を検出すると、射出速度を低下させ、その後
保圧工程の初期設定圧力に達すると射出工程から保圧工
程に切換えることを特徴とする射出成形機の制御方法。(1) In a method for controlling an injection molding machine that injects pre-plasticized resin into a mold using a screw or plunger,
The feature is that when a pressure set appropriately lower than the initial set pressure of the pressure holding process is detected in the injection process, the injection speed is reduced, and then when the initial set pressure of the pressure holding process is reached, the injection process is switched to the pressure holding process. A method for controlling an injection molding machine.
ーで金型内に射出する射出成形機の制御方法において、
射出工程で最大トルクを設定した状態で射出速度を制御
し、射出速度が設定値以下になると、これを検出して保
圧工程に切換えることを特徴とする射出成形機の制御方
法。(2) In a method for controlling an injection molding machine that injects pre-plasticized resin into a mold using a screw or plunger,
A method for controlling an injection molding machine, characterized in that the injection speed is controlled with a maximum torque set in the injection process, and when the injection speed becomes less than the set value, this is detected and the process is switched to a pressure holding process.
後、保圧工程では圧力を連続的に変化させることを特徴
とする射出成形機の制御方法。(3) A method for controlling an injection molding machine, which comprises changing the pressure continuously in the pressure holding process after switching to the pressure holding process using the method according to claim 1 or 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29649388A JPH02141221A (en) | 1988-11-24 | 1988-11-24 | Control of injection molding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29649388A JPH02141221A (en) | 1988-11-24 | 1988-11-24 | Control of injection molding machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02141221A true JPH02141221A (en) | 1990-05-30 |
Family
ID=17834268
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29649388A Pending JPH02141221A (en) | 1988-11-24 | 1988-11-24 | Control of injection molding machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02141221A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5425906A (en) * | 1993-09-21 | 1995-06-20 | Ube Industries, Inc. | Speed control method for injection molding machine |
| JP2011183704A (en) * | 2010-03-09 | 2011-09-22 | Sumitomo Heavy Ind Ltd | Injection molding machine and injection molding method |
| JP2012161982A (en) * | 2011-02-07 | 2012-08-30 | Japan Steel Works Ltd:The | Injection molding machine and injection molding method |
| JP2016159589A (en) * | 2015-03-04 | 2016-09-05 | ファナック株式会社 | Pressure control device for injection molding machine |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60198217A (en) * | 1984-03-22 | 1985-10-07 | Mitsubishi Heavy Ind Ltd | Controlling method of injection process and pressure retaining process |
| JPS61227012A (en) * | 1985-03-30 | 1986-10-09 | Katashi Aoki | Injection molding |
| JPS62174126A (en) * | 1986-01-28 | 1987-07-30 | Meiki Co Ltd | Control of injection pressure in injection molder |
| JPS62207622A (en) * | 1986-03-07 | 1987-09-12 | Japan Steel Works Ltd:The | Injection controlling of motor-driven injection machine |
| JPS62220315A (en) * | 1986-03-24 | 1987-09-28 | Japan Steel Works Ltd:The | Method and apparatus for injection process control of injection molding machine |
| JPS62236721A (en) * | 1986-04-07 | 1987-10-16 | Mitsubishi Heavy Ind Ltd | Pressure control for injection filling |
-
1988
- 1988-11-24 JP JP29649388A patent/JPH02141221A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60198217A (en) * | 1984-03-22 | 1985-10-07 | Mitsubishi Heavy Ind Ltd | Controlling method of injection process and pressure retaining process |
| JPS61227012A (en) * | 1985-03-30 | 1986-10-09 | Katashi Aoki | Injection molding |
| JPS62174126A (en) * | 1986-01-28 | 1987-07-30 | Meiki Co Ltd | Control of injection pressure in injection molder |
| JPS62207622A (en) * | 1986-03-07 | 1987-09-12 | Japan Steel Works Ltd:The | Injection controlling of motor-driven injection machine |
| JPS62220315A (en) * | 1986-03-24 | 1987-09-28 | Japan Steel Works Ltd:The | Method and apparatus for injection process control of injection molding machine |
| JPS62236721A (en) * | 1986-04-07 | 1987-10-16 | Mitsubishi Heavy Ind Ltd | Pressure control for injection filling |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5425906A (en) * | 1993-09-21 | 1995-06-20 | Ube Industries, Inc. | Speed control method for injection molding machine |
| JP2011183704A (en) * | 2010-03-09 | 2011-09-22 | Sumitomo Heavy Ind Ltd | Injection molding machine and injection molding method |
| JP2012161982A (en) * | 2011-02-07 | 2012-08-30 | Japan Steel Works Ltd:The | Injection molding machine and injection molding method |
| 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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