JPH01101134A - Control of injection process in injection molder - Google Patents
Control of injection process in injection molderInfo
- Publication number
- JPH01101134A JPH01101134A JP26068587A JP26068587A JPH01101134A JP H01101134 A JPH01101134 A JP H01101134A JP 26068587 A JP26068587 A JP 26068587A JP 26068587 A JP26068587 A JP 26068587A JP H01101134 A JPH01101134 A JP H01101134A
- Authority
- JP
- Japan
- Prior art keywords
- injection
- screw
- signal
- speed
- pressure holding
- 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
Links
- 238000000034 method Methods 0.000 title claims abstract description 61
- 238000002347 injection Methods 0.000 title claims description 52
- 239000007924 injection Substances 0.000 title claims description 52
- 238000005429 filling process Methods 0.000 claims abstract description 13
- 239000011347 resin Substances 0.000 claims abstract description 6
- 229920005989 resin Polymers 0.000 claims abstract description 6
- 238000001514 detection method Methods 0.000 claims abstract description 5
- 238000001746 injection moulding Methods 0.000 claims description 7
- 238000004886 process control Methods 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims description 2
- 238000007711 solidification Methods 0.000 claims description 2
- 230000008023 solidification Effects 0.000 claims description 2
- 230000007935 neutral effect Effects 0.000 abstract description 4
- 238000000465 moulding Methods 0.000 abstract description 3
- 230000006641 stabilisation Effects 0.000 abstract 1
- 238000011105 stabilization Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 5
- 238000007789 sealing Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
Landscapes
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
く産業上の利用分野〉
本発明は射出成形機の射出工程制御方法に係シ、特に充
填工程と保圧工程の切換方法に関する。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method for controlling an injection process of an injection molding machine, and more particularly to a method for switching between a filling process and a holding process.
く従来技術〉 ゛
従来の射出工程制御方法を第４図ないし第７図により説
明すると、１０１はスクリュで射出ラム１０２に作用す
る圧油により進退するようになっており、射出，計量が
行われる。Prior Art> ゛The conventional injection process control method will be explained with reference to Figs. 4 to 7. Reference numeral 101 is a screw that is moved forward and backward by pressure oil acting on an injection ram 102, and injection and metering are performed. .
１０３ 、 １０４は金型を示し、１０５はスクリユ１
０１に取付けられ同スクリュの往復運動に同調している
ラックを示すものである。１０６はピニオンを示し、前
記ラック１０５と噛合ってスクリュ１０１の移動により
回転し、スクリュ１０１の直線運動を回転運動に変換す
るものである。103 and 104 indicate molds, and 105 indicates a screw 1.
This figure shows a rack attached to 01 and synchronized with the reciprocating motion of the same screw. A pinion 106 meshes with the rack 105, rotates as the screw 101 moves, and converts the linear motion of the screw 101 into rotational motion.
１０７はポテンショメータを示し、ピニオン１０６に歯
車列等を介して、または直接に連結されてピニオン１０
６の回転を受けてスクリ：Ｌ１０１の移動量を連続的な
電気的信号に変換するもので、位置検出器を構成する。Reference numeral 107 indicates a potentiometer, which is connected to the pinion 106 via a gear train or the like or directly.
6 and converts the amount of movement of the screen L101 into a continuous electrical signal, and constitutes a position detector.
Ｓは射出ストロークを示し、同ストロークＳはＡ、Ｂ、
Ｃ，Ｄ、Ｅの５段階に区切ってあシ、射出時にスクリュ
１０１が同区間Ａ、Ｂ、Ｃ，Ｄ、Ｅを第７図に示すよう
ｖｌないしｖ５の各々異なった射出速度で通過するよう
構成される。S indicates the injection stroke, and the same stroke S is A, B,
The screw 101 is divided into five stages C, D, and E, so that during injection, the screw 101 passes through the same sections A, B, C, D, and E at different injection speeds from vl to v5, as shown in Fig. 7. configured.
油圧回路について説明すると、ｍｌは射出切換用ソレノ
イドパルプを示し、射出ラム１０２の制御を行うもので
ある。ｆｌは電磁フローコントロールバルブ〔流量調整
弁〕（以下電磁フローコンと呼ぶ）で、電圧或いは電流
（以下電圧として説明する）の強弱に比例して絞りが開
閉し電圧の大きい時は絞シが小さく、従って流量は多く
なる。また、電圧の小さい時は絞りが大きく、従って流
量は少くなる。To explain the hydraulic circuit, ml indicates an injection switching solenoid pulp, which controls the injection ram 102. fl is an electromagnetic flow control valve (hereinafter referred to as an electromagnetic flow control valve); the throttle opens and closes in proportion to the strength of voltage or current (hereinafter referred to as voltage); when the voltage is high, the throttle is small; Therefore, the flow rate increases. Furthermore, when the voltage is low, the aperture is large and the flow rate is therefore small.
ＰＦ２はポンプを示す。ｒは電磁リリーフバルブ（圧力
制御弁）を示し、電圧の強弱により設定圧が変化するも
のでおる。PF2 indicates a pump. r indicates an electromagnetic relief valve (pressure control valve), and the set pressure changes depending on the strength of the voltage.
電気回路について説明すると、１０７は前述の如くスク
リュ１０１の位置を電圧に変換して示すポテンショメー
タを示し、スクリュ１０１がストロークＳ間を移動する
間に距離に比例して電圧をＯよシ始ま構成る一定の電圧
まで連続的に変化させる。１０８はスクリュ１０１がＡ
区間進んだ時ポテンショメータ１０７が示す電圧を設定
するポテンショメータを示すものである。同様に、１０
９〜１１１はポテンショメータを示し、スクリュ１０１
がＡ＋Ｂ、Ａ＋Ｂ＋ＣＡ＋Ｂ＋Ｃ＋Ｄ進んだ時ポテンシ
ョメータ１０７が示す電圧を各々設定するもので、これ
らのポテンショメータ１０８〜１１１は射出速度切換位
置設定器を構成する。１１２〜１１５は信号発信器（比
較器）を示し、各ポテンショメータ１０８〜１１１の設
定電圧とスクリュ１０１の移動に伴い刻々変化するポテ
ンショメータ１０７の電圧とを比較し、両電圧が一致し
た時に内蔵するリレー（図示せず）が動作して信号を発
するよう構成されている。１１２ａ〜１１５ａは信号発
信器内にあるリレーのＡ接点、１１２ｂ〜１１５ｂはＢ
接点をそれぞれ示す。１１６，１１７は増幅器を示し、
後述するポテンショメータ１１８〜１２５に設定された
電圧を増幅して、電磁フローコンｆ１及び電磁リリーフ
パルプｒを作動させるものである。ポテンショメータ１
１ト１２２は、予め各々に電圧を設定しておき、信号発
信器１１２〜１１５の発する信号により電気回路（５０
〜５４）の切換えが行われた時、各々定められた電圧を
電磁フローコンｆｔＫ作用させ、予め定められた油量を
射出ラム１０２へ作用させて、射出速度を制御する電気
量設定器群を構成するものである。同様に、ポテンショ
メータ１２３〜１２５は、予め定められた電圧を設定し
ておき、これを電磁リリーフバルブｒに作用させ、充填
工程中の射出圧力及び保圧工程における保圧圧力を制御
する電気量設定器群を構成するものである。１００ＴＲ
はタイマを示し、保圧工程中の保圧圧力の切換えを行う
ものであり、接点１００Ｔ＊を有する。Ｒ８はリレーを
示し、Ａ接点ＦＬＳ、 、 Ｒ８３およびＢ接点Ｒ８２
を有する。To explain the electric circuit, 107 indicates a potentiometer that converts and indicates the position of the screw 101 into a voltage, and while the screw 101 moves between strokes S, the voltage starts to change from O to O in proportion to the distance. Continuously change voltage up to a certain level. 108 is screw 101 is A
This shows a potentiometer that sets the voltage indicated by potentiometer 107 when the section advances. Similarly, 10
9 to 111 indicate potentiometers, and screw 101
These potentiometers 108 to 111 constitute an injection speed switching position setter. Reference numerals 112 to 115 indicate signal transmitters (comparators), which compare the set voltage of each potentiometer 108 to 111 with the voltage of potentiometer 107, which changes every moment as the screw 101 moves, and when both voltages match, a built-in relay is activated. (not shown) is configured to operate and emit a signal. 112a to 115a are the A contacts of the relay in the signal transmitter, and 112b to 115b are the B contacts.
Each contact point is shown. 116 and 117 indicate amplifiers;
The voltage set in potentiometers 118 to 125, which will be described later, is amplified to operate the electromagnetic flow controller f1 and the electromagnetic relief pulp r. potentiometer 1
The electric circuits (50, 122, 122,
- 54) When the switching is performed, a set voltage is applied to the electromagnetic flow controller ftK, a predetermined amount of oil is applied to the injection ram 102, and a group of electric quantity setting devices is configured to control the injection speed. It is something to do. Similarly, the potentiometers 123 to 125 are used to set a predetermined voltage and act on the electromagnetic relief valve r to set the amount of electricity to control the injection pressure during the filling process and the holding pressure during the holding process. It constitutes a group of instruments. 100TR
indicates a timer, which switches the holding pressure during the holding pressure process, and has a contact point 100T*. R8 indicates a relay, A contact FLS, , R83 and B contact R82
has.
次に、動作について説明する。射出開始信号によシ、ソ
レノイドパルプｍ１が前進位置に切換ねると、電気回路
５０にあるポテンショメータ１１８に設定された電圧に
より電磁フローコンｆｌφ；定められた流量を射出ラム
１０２に作用させ、予め定められた射出速度でスクリュ
１０１はストロークＳ間中のへ区間を前進する。Next, the operation will be explained. When the solenoid pulp m1 is switched to the forward position in response to the injection start signal, the voltage set in the potentiometer 118 in the electric circuit 50 causes the electromagnetic flow controller flφ to apply a predetermined flow rate to the injection ram 102, and The screw 101 advances through the middle section of the stroke S at the injection speed.
その間射出圧は電気回路５５にあるポテンショメータ１
２５によって定められた電磁リリーフパルプｒの設定圧
に保たれる。スクリュ１０１がＡ区間を通過し了ると、
ポテンショメータ１０８の電圧と一致し、信号発信器１
１２により信号が発せられ接点１１２ｂが接点１１２ａ
に切換わり、従って電気回路５０が電気回路５１に切換
わり、今度はポテンショメータ１１９の設定電圧によシ
定められた流量によりスクリュ１０１はＢ区間を予め定
められた射出速度で前進する。同様にして、Ｃ区間はポ
テンショメータ１２０によシ、Ｄ区間はポテンショメー
タ１２１により、またＥ区間はポテンショメータ１２２
によシミ磁フローコンｆ１の流量が制御され、定められ
た射出速度でスクリュ１０１は前進する。スクリュ１０
１がＤ区間を通過し了って、信号発信器１１５の信号に
より接点１１５ｂが１１５ａに切換わると、同時にリレ
ーＲ８が励磁されてＡ接点Ｒ８１を閉じ、保圧圧力を切
換える為のタイマ１００ＴＲがタイミングを開始する。During that time, the injection pressure is controlled by potentiometer 1 in the electric circuit 55.
The set pressure of the electromagnetic relief pulp r determined by 25 is maintained. When the screw 101 finishes passing through section A,
Matches the voltage of potentiometer 108 and signal transmitter 1
12, a signal is emitted and the contact 112b becomes the contact 112a.
Therefore, the electric circuit 50 is changed to the electric circuit 51, and the screw 101 moves forward in section B at a predetermined injection speed with the flow rate determined by the set voltage of the potentiometer 119. Similarly, section C is controlled by potentiometer 120, section D is controlled by potentiometer 121, and section E is controlled by potentiometer 122.
The flow rate of the magnetic flow controller f1 is controlled, and the screw 101 moves forward at a predetermined injection speed. screw 10
1 has passed through the D section and the contact 115b is switched to 115a by the signal from the signal transmitter 115. At the same time, the relay R8 is energized and the A contact R81 is closed, and the timer 100TR for switching the holding pressure is activated. Start timing.
これと同時にＡ接点Ｒ８３（電気回路５６）も閉じるの
で、射出圧は゛ポテンショメータ１２４によシ決定され
る電磁リリーフパルプｒの設定圧となり、充填工程が完
了した後の保圧工程中の圧力制御に移る。At the same time, the A contact R83 (electric circuit 56) is closed, so the injection pressure becomes the set pressure of the electromagnetic relief pulp r determined by the potentiometer 124, and is used for pressure control during the pressure holding process after the filling process is completed. Move.
前記タイマ１００ＴＲがタイムアウトすると、接点１０
０ＴＲ’が電気回路５６よシミ気団路５７へ切換わり、
従って電磁リリーフパルプｒの設定圧はポテンショメー
タ１２３によシ決定されることＫなり、保圧圧力が変化
することになる０
前記保圧圧力が持続され、一定時間が経過すると金型１
０３および１０４のゲート部が固化し、ゲートシールが
行われ、充填工程開始とともにタイミングを開始する射
出工程のタイマ（図示せず）がタイムアウトすると、同
タイムアウト信号によりソレノイドバルブｍｌは中立位
置となシ、射出工程は完了する。When the timer 100TR times out, the contact 10
0TR' switches from the electric circuit 56 to the stain air mass path 57,
Therefore, the set pressure of the electromagnetic relief pulp r is determined by the potentiometer 123, and the holding pressure changes. When the holding pressure is maintained and a certain period of time has elapsed, the mold 1
When the gate parts of 03 and 104 are solidified and the gate seal is performed, and the injection process timer (not shown), which starts the timing at the start of the filling process, times out, the solenoid valve ml is moved to the neutral position by the same timeout signal. , the injection process is completed.
〈発明が解決しようとする問題点〉
前述のような制御方法であるので、ゲートシール状態の
確認のないま＼、射出工程タイマのタイムアウト信号に
より射出工程は完了する。即ち、射出工程の後半である
保圧工程も終了することになる。ゲートシールが射出時
間タイマと同一時点で終っていれば問題はないが、ゲー
トシールが射出時間タイマのＯＦＦ時刻よシ継続した場
合は、中途で打切りとなり、射出時間タイマのＯＦＦ時
刻よシ阜く終る場合は保圧工程は射出時間タイマのＯＦ
Ｆ時刻まで延びることになる。<Problems to be Solved by the Invention> Since the control method is as described above, the injection process is completed by the timeout signal of the injection process timer without checking the gate seal state. That is, the pressure holding process, which is the latter half of the injection process, is also completed. There is no problem if the gate seal ends at the same time as the injection time timer, but if the gate seal continues longer than the OFF time of the injection time timer, it will be discontinued midway and the operation will end at the same time as the OFF time of the injection time timer. If the pressure-holding process is completed, the injection time timer is OF
This will extend until time F.
このようにゲートシールの不安定さは、金型キャビティ
内の充填樹脂の重量９寸法、形状等のバラツキが生じ、
成形品は安定したものとならない。精密成形においては
特に著しい０
また、全射出工程が射出時間によシ定められているため
、タイマの設定が成形にとって重要であシ、作業者が運
転状況に応じて、何度か設定調整をしなければならなか
った。従っ【作業に熟練を用した。In this way, the instability of the gate seal is caused by variations in the weight, dimensions, shape, etc. of the resin filled in the mold cavity.
The molded product will not be stable. This is particularly noticeable in precision molding.Also, since the entire injection process is determined by the injection time, the timer settings are important for molding, and operators have to adjust the settings several times depending on the operating conditions. I had to. Therefore, [skills were used in the work.
本発明の目的は、前述の欠点を取除き、ゲートシールが
完了してから保圧工程、即ち射出工程が完了するようＫ
した射出工程制御方法を提供することである。The purpose of the present invention is to eliminate the above-mentioned drawbacks and to enable the completion of the pressure holding process, that is, the injection process, after the completion of the gate seal.
An object of the present invention is to provide a method for controlling an injection process.
〈問題を解決するための手段〉
前述の目的を達成するため、本発明は射出成形機の加熱
シリンダ内のスクリュを前進させ、同スクリュの前方に
蓄積された溶融樹脂を金型キャビィティ内に充填する充
填工程と同充填された樹脂の冷却固化に伴う収縮を補う
ために前記スクリュを背後から抑圧する保圧工程とから
成る射出工程制御方法において、充填工程から保圧工程
への切換を行った後、スクリュ移動の停止を検出し、同
検出信号により保圧工程を完了させることを特徴とする
射出成形機の射出工程制御方法とした。<Means for solving the problem> In order to achieve the above-mentioned object, the present invention advances a screw in a heating cylinder of an injection molding machine, and fills a mold cavity with molten resin accumulated in front of the screw. In an injection process control method consisting of a filling process in which the filling process is performed and a pressure holding process in which the screw is suppressed from behind in order to compensate for shrinkage due to cooling and solidification of the filled resin, the filling process was switched to the pressure holding process. Then, the method of controlling the injection process of an injection molding machine is characterized in that the stoppage of the screw movement is detected, and the holding pressure process is completed based on the detection signal.
く作 用〉
前述のように構成したのでスクリュの移動の停止、即ち
ゲートシールが終了してがら保圧工程が完了するように
なっている。Function> Since the structure is configured as described above, the pressure holding process is completed while the screw movement is stopped, that is, the gate sealing is completed.
〈実施例１〉
本発明の１実施例を第１図および第２図により説明する
。説明に際し、従来例と共通部材は同一番号を付し、説
明を略き、本発明によ）付加された部材のみ説明する。<Example 1> An example of the present invention will be described with reference to FIGS. 1 and 2. In the description, members common to those in the conventional example are given the same numbers, explanations are omitted, and only members added according to the present invention will be explained.
スクリ：Ｌ１０１の端部には板部材２ｏがスクリュ１０
１の移動に同調するよう取付られ、シリンダ２１と同シ
リンダ２１に嵌合するピストン２２から成る速度測定装
置２３に連結されている。Screw: At the end of L101, plate member 2o is attached to screw 10.
1 and connected to a speed measuring device 23 consisting of a cylinder 21 and a piston 22 fitted into the cylinder 21.
従って前記速度測定装置２３の測定値が充填工程から保
圧工程へ切換った後、０速度となったとき信号Ｓｏを発
するようにしである。Therefore, the signal So is generated when the measured value of the speed measuring device 23 reaches zero speed after switching from the filling process to the pressure holding process.
依って、電気回路は前記速度０にょシ発せられる信号Ｓ
ｏにより入る接点２４ａを設け、この接点２４ａが閉じ
るとリレーＲが作動するように構成するとともに、他の
別口路にある射出切換用ソレノイドパルプｍ１のコイル
２５の回路上に前記リレーＲのＢ接点Ｒｂを設け、前記
接点２４ａが入シ、リレーＲが働くとコイル２５の励磁
をＯＦＦさせソレノイドパルプｍ１を中立位置とし、保
圧工程を完了させる。Therefore, the electric circuit receives the signal S emitted when the speed is 0.
A contact 24a is provided which enters through the contact 24a, and when this contact 24a closes, the relay R is activated. A contact point Rb is provided, and when the contact point 24a is turned on and the relay R is activated, the excitation of the coil 25 is turned off, the solenoid pulp m1 is placed in the neutral position, and the pressure holding process is completed.
この場合、射出工程タイマ（図示せず）のタイムアウト
前に速度Ｏ信号Ｓｏが発さられ、リレーＲが作動すれば
コイル２５は無励磁となシ保圧工程、即ち射出工程は完
了する。また前記射出工程タイマがタイムアウトした後
であっても、速度０信号が発せられない限シ、保圧工程
、即ち射出工程の完了はないようにしである。In this case, the speed O signal So is generated before the injection process timer (not shown) times out, and when the relay R is activated, the coil 25 is de-energized and the pressure holding process, that is, the injection process is completed. Further, even after the injection process timer times out, the pressure holding process, that is, the injection process is not completed unless the speed 0 signal is issued.
〈実施例２〉
第３図により本発明による他の実施例を説明する。説明
に際し、前実施と同様、従来と共通する部材は同一の符
号を付し、説明は省略する。本実施例はスクリュの移動
をディジタル信号によシ検知する例であって、スクリュ
１０１の移動に同調する位置検出ヘッド３０がリニアス
ケールＳｌに対向するようにスクリュ１０１に取付てあ
り、スクリュ１０１の軸方向の一移動に伴い、パルスＨ
を発するようになっている。３２は電磁フローコンで速
度制御装置３３からの電気信号ＲＭＶおよびＬＭＶによ
シ制御され回路中の流量を調整し、スクリュ１０１の移
動速度を制御するものである。前記速度制御装置３３．
検出ヘッド３０から与えられるパルスＰＴによって入力
されるとともにスクリュ１０１の前進方向（図中左方向
）および後退方向（図中右方向）における移動速度ｖｉ
を変化せしめる速度切換位置ｘｉの設定部３４が設けで
ある。更に前記設定部３４から与えられる速度切換位置
信号ｘｌが与えられた以後のストロークＳ中の移動指令
速度に対応した速度信号ｖｉを発生する速度信号設定部
３５と同設定信号Ｖｉをアナログ設定速度信号に変換す
るＤ／Ａ変換器３６と、パルス信号ＰＴを計数して実速
度をパルス周波数に比例したアナログ電圧に変換するＦ
／Ｖ変換器とが設けである。そして、度になるよう制御
信号を発し、増巾部３９を介して前述の電気信号Ｒ，Ｍ
ＹおよびＬＭＶを発するようになっている。一方、４０
は圧力制御装置で充填と保圧工程の切換位置を設定する
保圧切換位置設定部４１に設定した位置にスクリュ１０
１が来たときのパルスＰＴを受け、切換と同時に作動す
るタイマ等の保圧圧力切換時間設定部４２を作動させ、
同設定部４２から信号によシ保圧圧力設定部４３に設定
した圧力となるようＤ／Ａ変換器４４を介して電磁リリ
ーフ弁４５へ作用するようになっている。<Example 2> Another example according to the present invention will be described with reference to FIG. In the description, like the previous implementation, members common to the conventional one are given the same reference numerals, and the description will be omitted. This embodiment is an example in which the movement of the screw is detected using a digital signal, and a position detection head 30 that is synchronized with the movement of the screw 101 is attached to the screw 101 so as to face the linear scale Sl. With one movement in the axial direction, the pulse H
It is designed to emit. Reference numeral 32 denotes an electromagnetic flow controller which is controlled by electric signals RMV and LMV from a speed control device 33 to adjust the flow rate in the circuit and control the moving speed of the screw 101. Said speed control device 33.
The moving speed vi of the screw 101 in the forward direction (left direction in the figure) and backward direction (right direction in the figure) is input by the pulse PT given from the detection head 30.
A setting section 34 for setting a speed switching position xi is provided for changing the speed switching position xi. Further, a speed signal setting section 35 generates a speed signal vi corresponding to the movement command speed during the stroke S after the speed switching position signal xl given from the setting section 34 is given, and the setting signal Vi is converted into an analog setting speed signal. A D/A converter 36 converts the pulse signal PT into an analog voltage proportional to the pulse frequency, and a D/A converter 36 converts the actual speed into an analog voltage proportional to the pulse frequency by counting the pulse signal PT.
/V converter is provided. Then, a control signal is emitted so that the electric signals R, M are transmitted through the amplifying section 39.
It is designed to emit Y and LMV. On the other hand, 40
The screw 10 is placed in the position set by the pressure holding switching position setting part 41 which sets the switching position between filling and pressure holding processes by the pressure control device.
In response to the pulse PT when 1 is reached, the holding pressure switching time setting section 42, such as a timer, which operates simultaneously with switching, is activated,
A signal from the setting section 42 acts on the electromagnetic relief valve 45 via the D/A converter 44 so that the pressure is set in the holding pressure setting section 43.
従って、充填から保圧工程へ切換りた後、前記速度制御
装置３３の速度信号設定部３５に速度０を設定しておき
、実速度Ｏを検出したとき、射出切換用電磁弁（図示せ
ず）を中立位置とし、保圧工程を完了させるようにする
。Therefore, after switching from filling to pressure holding process, the speed signal setting section 35 of the speed control device 33 is set to speed 0, and when the actual speed O is detected, the injection switching solenoid valve (not shown) ) to the neutral position to complete the pressure holding process.
〈発明の効果〉
以上説明したように充填工程から保圧工程へ切換った後
、スクリーの移動停止したこと（ゲートシールが行われ
た）を確認してがら保圧工程が完了するので、当初に掲
げた欠点が取除かれ成形品に重量２寸法、形状等のバラ
ツキがなくなシ、また射出工程時間の設定も成形品の精
度と関係なくなり、設定時間も大まかで良い。<Effects of the Invention> As explained above, after switching from the filling process to the pressure holding process, the pressure holding process is completed while confirming that the scree has stopped moving (gate sealing has been performed). The drawbacks mentioned above are eliminated, and there is no variation in weight, dimensions, shape, etc. of the molded product, and the injection process time setting has no relation to the precision of the molded product, so the setting time can be set roughly.
第１図は本発明の１実施例を示す図。第２図はその電気
制御回路図。第３図は本発明の他の実施例を示す図。第
４図は従来装置を示す図。第５図はその電気制御回路図
。第６図は射出工程における射出速度とスクリュストロ
ーフの位置関係を示すグラフおよび射出圧力と射出工程
時間の関係を示すグラフ。第７図はスクリュストローク
とポテンショメータの発生電圧との関係グラフ。FIG. 1 is a diagram showing one embodiment of the present invention. Figure 2 is its electrical control circuit diagram. FIG. 3 is a diagram showing another embodiment of the present invention. FIG. 4 is a diagram showing a conventional device. Figure 5 is its electrical control circuit diagram. FIG. 6 is a graph showing the relationship between the injection speed and the position of the screw stroke in the injection process, and a graph showing the relationship between the injection pressure and the injection process time. Figure 7 is a graph of the relationship between the screw stroke and the voltage generated by the potentiometer.
Claims (1)
、同スクリュの前方に蓄積された溶融樹脂を金型キャビ
イティ内に充填する充填工程と、同充填された樹脂の冷
却固化に伴う収縮を補うために前記スクリュを背後から
押圧する保圧工程とから成る射出工程制御方法において
、充填工程から保圧工程への切換を行った後、スクリュ
移動の停止を検出し、同検出信号により保圧工程を完了
させることを特徴とする射出成形機の射出工程制御方法
。 ２）充填工程から保圧工程への切換はスクリュがあらか
じめ設定した位置を通過したとき、同通過信号により行
うことを特徴とする前記特許請求の範囲第１項記載の射
出成形機の射出工程制御方法。 ３）充填工程から保圧工程への切換は射出速度があらか
じめ設定した速度値と一致したとき行うことを特徴とし
た前記特許請求の範囲第１項記載の射出成形機の射出工
程制御方法。[Claims] 1) A filling step in which a screw in a heating cylinder of an injection molding machine is advanced to fill a mold cavity with molten resin accumulated in front of the screw, and cooling of the filled resin. In an injection process control method that includes a pressure holding process in which the screw is pressed from behind to compensate for shrinkage due to solidification, after switching from the filling process to the pressure holding process, stoppage of screw movement is detected and the same process is performed. An injection process control method for an injection molding machine, characterized in that a pressure holding process is completed based on a detection signal. 2) The injection process control of the injection molding machine according to claim 1, wherein the switching from the filling process to the pressure holding process is performed by a passing signal when the screw passes a preset position. Method. 3) The injection process control method for an injection molding machine according to claim 1, wherein the switching from the filling process to the pressure holding process is performed when the injection speed matches a preset speed value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62260685A JP2646095B2 (en) | 1987-10-15 | 1987-10-15 | Injection process control method for injection molding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62260685A JP2646095B2 (en) | 1987-10-15 | 1987-10-15 | Injection process control method for injection molding machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01101134A true JPH01101134A (en) | 1989-04-19 |
| JP2646095B2 JP2646095B2 (en) | 1997-08-25 |
Family
ID=17351354
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62260685A Expired - Fee Related JP2646095B2 (en) | 1987-10-15 | 1987-10-15 | Injection process control method for injection molding machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2646095B2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63312128A (en) * | 1987-06-15 | 1988-12-20 | Toyo Mach & Metal Co Ltd | Dwelling process control device of injection molder |
-
1987
- 1987-10-15 JP JP62260685A patent/JP2646095B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63312128A (en) * | 1987-06-15 | 1988-12-20 | Toyo Mach & Metal Co Ltd | Dwelling process control device of injection molder |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2646095B2 (en) | 1997-08-25 |
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