JPH0246371B2 - DENDOSHASHUTSUSEIKEIKINOSEIGYOSOCHI - Google Patents

DENDOSHASHUTSUSEIKEIKINOSEIGYOSOCHI

Info

Publication number
JPH0246371B2
JPH0246371B2 JP25867185A JP25867185A JPH0246371B2 JP H0246371 B2 JPH0246371 B2 JP H0246371B2 JP 25867185 A JP25867185 A JP 25867185A JP 25867185 A JP25867185 A JP 25867185A JP H0246371 B2 JPH0246371 B2 JP H0246371B2
Authority
JP
Japan
Prior art keywords
value
injection
motor
pressure
integrated power
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 - Lifetime
Application number
JP25867185A
Other languages
Japanese (ja)
Other versions
JPS62119021A (en
Inventor
Kenji Kasugai
Akira Yokota
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.)
Japan Steel Works Ltd
Original Assignee
Japan Steel Works 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 Japan Steel Works Ltd filed Critical Japan Steel Works Ltd
Priority to JP25867185A priority Critical patent/JPH0246371B2/en
Publication of JPS62119021A publication Critical patent/JPS62119021A/en
Publication of JPH0246371B2 publication Critical patent/JPH0246371B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • B29C45/76—Measuring, controlling or regulating
    • B29C45/77—Measuring, controlling or regulating of velocity or pressure of moulding material
    • B29C2045/776—Measuring, controlling or regulating of velocity or pressure of moulding material determining the switchover point to the holding pressure

Description

【発明の詳細な説明】 （産業上の利用分野） 本発明は、電動射出成形機の制御装置に関する
ものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a control device for an electric injection molding machine.

（従来の技術） 射出成形機による射出の際には、金型キヤビテ
イ内に溶融樹脂を充てんし（充てん工程）、次い
で溶融樹脂の冷却固化に伴なう収縮を補うために
金型キヤビテイ内を所定の時間だけ所定圧力に保
持する（保圧工程）。このために適切な時期に充
てん工程から保圧工程への切換えを行う必要があ
るが、この切換えのための装置としては、射出プ
ランジヤまたはスクリユーが所定の位置に達した
とき切換えを行う装置、射出プランジヤ内の油圧
が所定値に達したとき切換えを行う装置、金型キ
ヤビテイ内の樹脂圧力が所定値に達したとき切換
えを行う装置などがある。(Prior art) During injection using an injection molding machine, the inside of the mold cavity is filled with molten resin (filling process), and then the inside of the mold cavity is filled with molten resin to compensate for shrinkage caused by cooling and solidification of the molten resin. Maintain a predetermined pressure for a predetermined time (pressure holding process). For this reason, it is necessary to switch from the filling process to the holding process at an appropriate time, and there are two types of devices for this switching: a device that switches when the injection plunger or screw reaches a predetermined position; There are devices that switch when the oil pressure in the plunger reaches a predetermined value, and devices that switch when the resin pressure in the mold cavity reaches a predetermined value.

（発明が解決しようとする問題点） しかし、射出プランジヤまたはスクリユーの位
置によつて充てん工程から保圧工程への切換えを
行う場合には、金型キヤビテイが完全充てんに近
い状態となつたときに充てん工程から保圧工程へ
の切換えが行われるように切換え位置を設定する
ことが非常に困難であるという問題がある。切換
位置の設定が適切でない場合、例えば金型キヤビ
テイが十分には充てんされていない状態で充てん
工程から保圧工程への切換えが行われると、溶融
樹脂補充のための保圧工程の時間の多くを取ら
れ、有効な保圧時間が短くなり、いわゆる「ひ
け」を発生し易くなる。この「ひけ」を防止する
ために保圧時間を長くすると、１成形サイクルに
要する時間が長くなり、生産効率が低下する。一
方、切換え位置を金型キヤビテイがほぼ完全に充
てんされる位置に設定した場合であつても、金型
温度、樹脂温度、樹脂材料などの微妙な変化によ
つて射出プランジヤまたはスクリユーが切換位置
まで前進することができず、保圧工程へ移行しな
い不具合（いわゆる「シヨートシヨツト」）が発
生することがある。(Problem to be solved by the invention) However, when switching from the filling process to the pressure holding process depending on the position of the injection plunger or screw, when the mold cavity is almost completely filled, There is a problem in that it is very difficult to set the switching position so that the switching from the filling process to the pressure holding process is performed. If the switching position is not set appropriately, for example, if the filling process is switched to the pressure holding process when the mold cavity is not fully filled, much of the time for the pressure holding process to replenish the molten resin will be lost. The effective pressure holding time is shortened, and so-called "sink marks" are more likely to occur. If the holding pressure time is increased in order to prevent this "sink", the time required for one molding cycle becomes longer and production efficiency decreases. On the other hand, even if the switching position is set to a position where the mold cavity is almost completely filled, slight changes in mold temperature, resin temperature, resin material, etc. may cause the injection plunger or screw to reach the switching position. A problem may occur in which the machine cannot move forward and does not move to the pressure holding process (so-called "short shot").

射出プランジヤ内の油圧または金型キヤビテイ
内の樹脂圧力を検出してこれが所定値に達したと
き充てん工程から保圧工程に切換える装置の場合
には、充填工程中の射出プランジヤまたはスクリ
ユーの前進速度によつて射出プランジヤ内の油圧
または金型キヤビテイ内の樹脂圧力が変動するた
め、射出プランジヤまたはスクリユーの前進速度
の設定を変えるごとに充てん工程から保圧工程へ
の切換え圧力を設定し直す必要があり、作業性が
良くないという問題点がある。 In the case of a device that detects the oil pressure in the injection plunger or the resin pressure in the mold cavity and switches from the filling process to the pressure holding process when this reaches a predetermined value, the forward speed of the injection plunger or screw during the filling process is As a result, the oil pressure in the injection plunger or the resin pressure in the mold cavity fluctuates, so it is necessary to reset the switching pressure from the filling process to the holding process each time the forward speed setting of the injection plunger or screw is changed. However, there is a problem that the workability is not good.

本発明は、上記のような問題点を解決すること
を目的としている。 The present invention aims to solve the above problems.

（問題点を解決するための手段） 本発明は、第一の解決手段として、射出プラン
ジヤまたはスクリユーの射出動作開始時点から、
射出用モータへの電流値および射出用モータの回
転速度を検知し始め、これらの検出値を積算電力
演算器に入力して積算電力値を演算し、この演算
値が射出時間の経過とともに増加してゆく途上
で、あらかじめ保圧切換値設定器に設定された所
定値と一致した時点で制御器に信号を発し、次の
保圧工程に移行するよう構成したものである。(Means for Solving the Problems) As a first means of solving the problems, the present invention provides, from the start of the injection operation of the injection plunger or screw,
The current value to the injection motor and the rotation speed of the injection motor are started to be detected, and these detected values are input to the integrated power calculator to calculate the integrated power value, and this calculated value increases as the injection time passes. During the process, when the pressure matching value matches a predetermined value set in advance in the pressure holding switching value setting device, a signal is sent to the controller to proceed to the next pressure holding process.

また、第二の解決手段として、射出プランジヤ
またはスクリユーの射出動作開始時点から、射出
用モータへの電流値および電圧値を検出し始め、
これらの検出値を積算電力演算器に入力して積算
電力値を演算し、この演算値が射出時間の経過と
ともに増加してゆく途中で、あらかじめ保圧切換
値設定器に設定された所定値と一致した時点で制
御器に信号を発し、次の保圧工程に移行するよう
構成したものである。 In addition, as a second solution, the current value and voltage value to the injection motor are started to be detected from the start of the injection operation of the injection plunger or screw,
These detected values are input to the integrated power calculator to calculate the integrated power value, and as this calculated value increases with the elapse of injection time, it becomes different from the predetermined value set in advance in the holding pressure switching value setting device. The system is configured to issue a signal to the controller when they match, and proceed to the next pressure holding step.

（作用） 射出動作開始から、射出用モータの回転によ
り、ボールネジ機構等の動力伝達系を介して、射
出プランジヤまたはスクリユーが前進し、金型内
に溶融樹脂が注入されていく。この時の射出用モ
ータへの電流値と射出用モータの回転速度、ある
いは同モータへの電流値と電圧値、を検出して、
これらを、ともに積算電力演算器に入力して、時
間経過に従つて積算電力を演算する。一方、充て
ん工程から保圧工程へ切換えるための保圧切換値
設定器にあらかじめ適当な値を設定しておく。こ
の所定値と前記積算電力の演算値とを、比較器に
より比較動作を継続し、両者が一致した時点で、
比較器より制御器を介して、モータ制御用のドラ
イバアンプに信号を送つて、次の保圧工程に移行
するよう射出用モータを制御する。この時の積算
電力値の変化は第２図に示すようになる。図中Ｏ
点は射出開始点、Ｐ点は保圧切換点である。(Function) From the start of the injection operation, the injection plunger or screw moves forward through a power transmission system such as a ball screw mechanism due to rotation of the injection motor, and molten resin is injected into the mold. At this time, detect the current value to the injection motor and the rotational speed of the injection motor, or the current value and voltage value to the same motor,
Both of these are input to an integrated power calculator, and integrated power is calculated over time. On the other hand, an appropriate value is set in advance in the pressure retention switching value setting device for switching from the filling process to the pressure retention process. The comparator continues to compare this predetermined value and the calculated value of the integrated power, and when the two match,
A signal is sent from the comparator to the driver amplifier for motor control via the controller, and the injection motor is controlled to move to the next pressure holding process. The changes in the integrated power value at this time are as shown in FIG. O in the diagram
The point is the injection start point, and the P point is the holding pressure switching point.

（実施例 １） 本発明の一実施例を第１図ａに示す。１１はシ
リンダ、１２はスクリユー、１３はスクリユー１
２とボールナツト１４を一体化するための部材で
ある。１６はボールナツ１４と対をなすボールネ
ジ１５と、このボールネジ１５を回転させる射出
用モータ６とを連結する継手等の伝達要素であ
る。１７は溶融樹脂であり、図全体は充てん動作
直前の状態を示している。(Example 1) An example of the present invention is shown in FIG. 1a. 11 is the cylinder, 12 is the screw, 13 is the screw 1
This is a member for integrating the ball nut 2 and the ball nut 14. Reference numeral 16 denotes a transmission element such as a joint that connects the ball screw 15 that pairs with the ball nut 14 and the injection motor 6 that rotates the ball screw 15. 17 is a molten resin, and the entire figure shows the state immediately before the filling operation.

射出用モータ６はドライバアンプ４により駆動
制御される。射出用モータ６への電流値（）を
電流検出器７により検出し、かつ射出モータ６の
回転速度Ｎを回転速度検出器８により検出し、こ
れら両者を、積算電力演算器３にともに入力す
る。そして、この演算値と、あらかじめ保圧切換
値設定器１に設定された所定値とを、比較器２に
より比較する。さらに両者が一致した時に比較器
２により出力される信号を受けとつて、次の保圧
工程に移行するよう射出用モータ６を駆動制御す
るドライバアンプ４に制御信号を送る制御器５が
設けられている。 The injection motor 6 is driven and controlled by the driver amplifier 4. The current value () to the injection motor 6 is detected by the current detector 7, and the rotation speed N of the injection motor 6 is detected by the rotation speed detector 8, and both of these are input to the integrated power calculator 3. . Then, the comparator 2 compares this calculated value with a predetermined value set in advance in the holding pressure switching value setter 1. Furthermore, a controller 5 is provided which receives a signal output from the comparator 2 when the two match, and sends a control signal to a driver amplifier 4 that drives and controls the injection motor 6 so as to proceed to the next pressure holding process. ing.

ここで、積算電力演算器３によつて、積算電力
を演算するには、射出用モータ６への電流値
（）と、射出用モータ６に付属させた回転速度
検出器８からの回転速度信号Ｎを要している。通
常、モータのトルクＴは電流値（）の関数であ
りＴ＝ｆ（）と表現され得る。したがつて、電
力量Ｗ＝2π・Ｎ・Ｔ／6120（Ｎ；モータ回転速度）と して算出し得るので、上記回転速度信号（Ｎ）と
電流値信号（）とにより、積算電力値は∫t 02π・
Ｎ・Ｔ／6120・dt即ち、K∫x 0ｆ（ｔ）・Ｎ（ｔ）dt
となる。回転数Ｎも射出工程中、複数段に変化さ
せるのが普通なので時間の関数である。 Here, in order to calculate the integrated power by the integrated power calculator 3, the current value () to the injection motor 6 and the rotation speed signal from the rotation speed detector 8 attached to the injection motor 6 are input. It requires N. Usually, the motor torque T is a function of the current value () and can be expressed as T=f(). Therefore, the amount of electric power can be calculated as W = 2π・N・T/6120 (N: motor rotation speed), so the integrated electric power value is ∫ t from the above rotation speed signal (N) and current value signal (). 0 2π・
N・T/6120・dt, that is, K∫ x 0 f(t)・N(t)dt
becomes. The rotational speed N is also a function of time, since it is common to change it in multiple steps during the injection process.

なお、上記電力量Ｗの式は、次のとおり導いた
ものである。 Note that the above equation for the amount of electric power W was derived as follows.

一般に、モータの回転によりボールネジなどを
直線運動させる場合、定常パワーP0（KW）は次
式で与えられる。 Generally, when a ball screw or the like is moved linearly by the rotation of a motor, the steady power P 0 (KW) is given by the following formula.

P0＝（μ・Wl・Vl）／（6120・η） (1) ただし、μ：摩擦係数 Wl：直線運動部の重量 Vl：直線運動部の速度 η：減速機の効率 また、ボールネジについては、そのトルクT1
（Kg・ｍ）は次式で与えられる。 P 0 = (μ・Wl・Vl)/(6120・η) (1) However, μ: Friction coefficient Wl: Weight of linear motion part Vl: Speed of linear motion part η: Efficiency of reducer , whose torque T 1
(Kg・m) is given by the following formula.

T1＝（ｆ・ｌ）／（2π・η′） (2) ただし、ｆ：推力 ｌ：ネジリード η′：ネジ効率 したがつて、 ｌ＝（2πη′・T1）／ｆ (3) 一方、下記式がそれぞれ与えられる。 T 1 = (f・l)/(2π・η′) (2) However, f: Thrust force l: Screw lead η′: Screw efficiency Therefore, l=(2πη′・T 1 )/f (3) On the other hand , the following formulas are given, respectively.

Vl＝N1・ｌ (4) ただし、N1：ボールネジ回転速度（rpm） μ・Wl＝ｆ (5) したがつて、(1)式は次のとおり展開される。 Vl=N 1 ·l (4) However, N 1 : Ball screw rotation speed (rpm) μ·Wl=f (5) Therefore, equation (1) is expanded as follows.

P0＝（ｆ・N1・ｌ）／6120・η）＝［（ｆ・N1）／（61
20・η）］・［（2πη′・T1）／ｆ］ ＝［（2πN1・T1）／6120］・［η′／η］(6) 次に、モータの駆動トルクＴ（Kg・ｍ）、及び
モータの回転速度Ｎ（rpm）とボールネジの上記
T1及びN1とは、それぞれ下記の関係を有してい
る。P 0 = (f・N 1・l)/6120・η)=[(f・N 1 )/(61
20・η)]・[(2πη′・T 1 )/f] = [(2πN 1・T 1 )/6120]・[η′/η] (6) Next, the motor drive torque T (Kg・m), and the rotational speed N (rpm) of the motor and the above of the ball screw.
T 1 and N 1 have the following relationships, respectively.

T1＝Ｔ・R1／Ｒ (7) N1＝Ｎ・Ｒ／R1 (8) ただし、R1：ボールネジ駆動歯車径 Ｒ：サーボモータ歯車径 すなわち、次のとおりとなる。 T 1 = T・R 1 /R (7) N 1 =N・R/R 1 (8) However, R 1 : Ball screw drive gear diameter R : Servo motor gear diameter In other words, it is as follows.

N1・T1＝Ｎ・Ｔ (9) したがつて、(6)式より P0＝［（2πN・Ｔ）／6120］・［η′／η］(10) が得られる。 N 1 ·T 1 =N·T (9) Therefore, from equation (6), P 0 = [(2πN·T)/6120]·[η′/η] (10) is obtained.

また、η及びη′をそれぞれ約1.0とすると、定
常パワーP0は次式のとおりとなる。 Further, when η and η' are each about 1.0, the steady power P 0 is given by the following equation.

P0＝（2π・Ｎ・Ｔ）／6120 (11) 本発明においては、上記電力量Ｗとして(11)式の
定常パワーP0を採用したものである。 P 0 =(2π·N·T)/6120 (11) In the present invention, the steady power P 0 of equation (11) is adopted as the above-mentioned power amount W.

（実施例 ２） 本発明の他の実施例は、第１図ｂに示すとおり
実施例１の回転速度検出器８に代えて射出用モー
タの電圧検出器８′により構成したものである。(Embodiment 2) In another embodiment of the present invention, as shown in FIG. 1b, the rotational speed detector 8 of Embodiment 1 is replaced with a voltage detector 8' for the injection motor.

射出用モータ６はドライバアンプ４により駆動
制御される。また射出用モータ６への電流値と電
圧値をそれぞれ電流検出器７と電圧検出器８′に
より検出し、これらを積算電力演算器３に、とも
に入力する。この演算値と、あらかじめ保圧切換
値設定器１に設定された所定値とを比較器２によ
り比較する。さらに両者が一致した時に比較器２
により出力される信号を受けとつて、次の保圧工
程に移行するよう射出用モータ６を駆動制御する
ドライバアンプ４に制御信号を送る制御器５が設
けられている。 The injection motor 6 is driven and controlled by the driver amplifier 4. Further, the current value and voltage value to the injection motor 6 are detected by a current detector 7 and a voltage detector 8', respectively, and these are inputted to the integrated power calculator 3. A comparator 2 compares this calculated value with a predetermined value set in advance in the holding pressure switching value setter 1. Furthermore, when both match, comparator 2
A controller 5 is provided which receives a signal output from the injection molding apparatus 1 and sends a control signal to a driver amplifier 4 which drives and controls the injection motor 6 so as to proceed to the next pressure holding process.

ここで積算電力器３は、電流値と電圧値と
により∫x 0dtなる積分演算を行うものである。 Here, the power integrating unit 3 performs an integral calculation of ∫ x 0 dt using the current value and the voltage value.

（発明の効果） 以上説明してきたように、本発明によると、金
型キヤビテイへの溶融樹脂の充てん状態を射出動
作開始時点からの積算電力値によつて検出し、こ
れにより充てん工程から保圧工程への切換えを行
うようにしたので、射出による充てんエネルギー
が常に一定となるため適正なタイミングで充てん
工程から保圧工程への切換えを制御することがで
きる。これにより、従来のように射出プランジヤ
またはスクリユーの位置によつて切換えを行う場
合に発生していた「ひけ」、「シヨートシヨツト」
などの問題を解決することができ、また射出プラ
ンジヤの圧力または金型キヤビテイの樹脂圧力に
基いて切換えを制御する従来の装置の作業性の悪
さの問題も解決することができる。(Effects of the Invention) As explained above, according to the present invention, the state of filling the mold cavity with molten resin is detected based on the integrated power value from the start of the injection operation, and thereby the holding pressure is increased from the filling process. Since the switching to the process is performed, the filling energy due to injection is always constant, and therefore the switching from the filling process to the pressure holding process can be controlled at an appropriate timing. This eliminates the ``sink'' and ``shot shot'' that occur when switching by the position of the injection plunger or screw as in the past.
It is also possible to solve the problem of poor workability of conventional devices that control switching based on the pressure of the injection plunger or the resin pressure of the mold cavity.

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

第１図ａ，ｂは本発明の実施例構成図である。
第２図は充てん、保圧工程での積算電力値の変化
グラフである。 １……保圧切換値設定器、２……比較器、３…
…積算電力演算器、４……ドライバアンプ、５…
…制御器、６……射出用モータ、７……電流検出
器、８……回転速度検出器、８′……電圧検出器、
１１……シリンダ、１２……スクリユー、１３…
…部材、１４……ボールナツト、１５……ボール
ネジ、１６……伝達要素。 FIGS. 1a and 1b are configuration diagrams of an embodiment of the present invention.
FIG. 2 is a graph of changes in integrated power values during the filling and pressure holding steps. 1... Holding pressure switching value setter, 2... Comparator, 3...
...integrated power calculator, 4...driver amplifier, 5...
...Controller, 6...Injection motor, 7...Current detector, 8...Rotation speed detector, 8'...Voltage detector,
11...Cylinder, 12...Screw, 13...
... Member, 14 ... Ball nut, 15 ... Ball screw, 16 ... Transmission element.

Claims (1)

【特許請求の範囲】 １ 射出プランジヤまたはスクリユーを電動機に
よつて軸方向に駆動させて充てん工程および保圧
工程を行う電動射出成形機の制御装置において、
射出用モータへの電流値を検知する電流検出器
と、該モータの回転速度を検知する回転速度検出
器を設け、これら二者の検出値から積算電力値を
演算する積算電力演算器の演算値と、所定の判定
値を設定可能な保圧切換値設定器の所定値とを比
較する比較器を設け、該比較器より一致信号が出
力された時、充てん工程から保圧工程に移行する
よう射出用モータを駆動制御することを特徴とす
る電動射出成形機の制御装置。 ２ 射出プランジヤまたはスクリユーを電動機に
よつて軸方向に駆動させて充てん工程および保圧
工程を行う電動射出成形機の制御装置において、
射出用モータへの電流値および電圧値を検出する
電流検出器および電圧検出器を設け、これら二者
の検出値から積算電力値を演算する積算電力演算
器の演算値と、所定の判定値を設定可能な保圧切
換値設定器の所定値とを比較する比較器を設け、
該比較器より一致信号が出力された時、充てん工
程から保圧工程に移行するよう射出用モータを駆
動制御することを特徴とする電動射出成形機の制
御装置。[Scope of Claims] 1. A control device for an electric injection molding machine that performs a filling process and a pressure holding process by driving an injection plunger or screw in the axial direction by an electric motor,
A current detector that detects the current value to the injection motor and a rotation speed detector that detects the rotation speed of the motor are provided, and the calculated value of the integrated power calculator that calculates the integrated power value from the detected values of these two. and a predetermined value of a holding pressure switching value setter that can set a predetermined judgment value, and when a matching signal is output from the comparator, the filling process is shifted to the holding pressure process. A control device for an electric injection molding machine characterized by driving and controlling an injection motor. 2. In a control device for an electric injection molding machine that performs a filling process and a pressure holding process by driving an injection plunger or screw in the axial direction by an electric motor,
A current detector and a voltage detector are provided to detect the current value and voltage value to the injection motor, and the calculated value of an integrated power calculator that calculates the integrated power value from the detected values of these two and a predetermined judgment value are A comparator is provided to compare the settable holding pressure switching value setting device with a predetermined value.
A control device for an electric injection molding machine, characterized in that, when a coincidence signal is output from the comparator, driving and controlling an injection motor so as to shift from a filling process to a pressure holding process.
JP25867185A 1985-11-20 1985-11-20 DENDOSHASHUTSUSEIKEIKINOSEIGYOSOCHI Expired - Lifetime JPH0246371B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP25867185A JPH0246371B2 (en) 1985-11-20 1985-11-20 DENDOSHASHUTSUSEIKEIKINOSEIGYOSOCHI

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP25867185A JPH0246371B2 (en) 1985-11-20 1985-11-20 DENDOSHASHUTSUSEIKEIKINOSEIGYOSOCHI

Publications (2)

Publication Number Publication Date
JPS62119021A JPS62119021A (en) 1987-05-30
JPH0246371B2 true JPH0246371B2 (en) 1990-10-15

Family

ID=17323480

Family Applications (1)

Application Number Title Priority Date Filing Date
JP25867185A Expired - Lifetime JPH0246371B2 (en) 1985-11-20 1985-11-20 DENDOSHASHUTSUSEIKEIKINOSEIGYOSOCHI

Country Status (1)

Country Link
JP (1) JPH0246371B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019146010A1 (en) * 2018-01-24 2019-08-01 株式会社日立製作所 Apparatus for detecting defect in workpiece

Also Published As

Publication number Publication date
JPS62119021A (en) 1987-05-30

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