JPH0262220A - Method for controlling starting of screw - Google Patents
Method for controlling starting of screwInfo
- Publication number
- JPH0262220A JPH0262220A JP21249488A JP21249488A JPH0262220A JP H0262220 A JPH0262220 A JP H0262220A JP 21249488 A JP21249488 A JP 21249488A JP 21249488 A JP21249488 A JP 21249488A JP H0262220 A JPH0262220 A JP H0262220A
- Authority
- JP
- Japan
- Prior art keywords
- screw
- temperature
- time
- oil
- pressure
- 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 10
- 238000010438 heat treatment Methods 0.000 claims abstract description 14
- 238000001746 injection moulding Methods 0.000 claims description 5
- 230000005856 abnormality Effects 0.000 claims description 2
- 238000012545 processing Methods 0.000 claims description 2
- 239000011347 resin Substances 0.000 abstract description 7
- 229920005989 resin Polymers 0.000 abstract description 7
- 238000002347 injection Methods 0.000 abstract description 5
- 239000007924 injection Substances 0.000 abstract description 5
- 238000000465 moulding Methods 0.000 description 6
- 238000012360 testing method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
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、スクリュ式射出成形機に係り、特に起動制御
方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a screw injection molding machine, and particularly to a start-up control method.
［従来の技術］
普通、スクリュ式射出成形機を起動し、計量を開始する
には、前回の射出の際、スクリュと加熱シリンダとの間
に残り、凝固した成形用樹脂を溶融する必要がある。[Prior Art] Normally, in order to start up a screw injection molding machine and start metering, it is necessary to melt the solidified molding resin that remained between the screw and the heating cylinder during the previous injection. .
このため従来は、加熱シリンダを予め定められた温度ま
で加熱し、その温度を一定時間保持することで、成形用
樹脂を溶融したとみなし、インターロックを解除してモ
ータを駆動するという方法が用いられている。For this reason, the conventional method used was to heat a heating cylinder to a predetermined temperature, hold that temperature for a certain period of time, assume that the molding resin has been melted, release the interlock, and drive the motor. It is being
［発明が解決しようとする課題］
しかしながら、従来の方法では、加熱シリンダの加熱設
定温度の不良、あるいは、温度保持時間の設定不良等に
よって前回使用した時の成形用樹脂が完全に溶融しない
内に、インターロックが解除され、モータが駆動する場
合があり、スクリュの折損、逆流防止装置の部品の破損
等を引き起こすといった問題点があった。[Problems to be Solved by the Invention] However, in the conventional method, the molding resin used last time may not melt completely due to an incorrect setting of the heating temperature of the heating cylinder or an incorrect setting of the temperature holding time. There are cases where the interlock is released and the motor is driven, causing problems such as breakage of the screw and damage to parts of the backflow prevention device.
本発明は、インターロックを解除する前に、スクリュが
可動状態にあるかどうかを試験することで起動時におけ
るスクリュの折損、逆流防止装置の部品の破損等を防ぐ
ことを技術的課題とする。The technical problem of the present invention is to prevent breakage of the screw during startup, damage to parts of the backflow prevention device, etc. by testing whether the screw is in a movable state before releasing the interlock.
［課題を解決するための手段］
本発明は、スクリュ式射出成形機を起動する際に、加熱
シリンダを予め定められた温度まで加熱し、前記温度を
予め定められた時間だけ保ち、その後インターロックを
解除してモータを回転するスクリュ起動方法において、
インターロックを解除する前に、前記スクリュが可動状
態にあるかどうか試験し、駆動不可能の場合に、異常処
理を行うことを特徴とする。[Means for Solving the Problems] The present invention heats a heating cylinder to a predetermined temperature when starting a screw injection molding machine, maintains the temperature for a predetermined time, and then sets an interlock. In the screw starting method of releasing the motor and rotating the motor,
Before releasing the interlock, a test is performed to see if the screw is in a movable state, and if the screw cannot be driven, abnormality processing is performed.
［作用］ 加熱シリンダを予め定めた温度まで加熱する。[Effect] Heat the heating cylinder to a predetermined temperature.
その温度を保ち、一定時間経過させた後、スクリュが可
動かどうかを試験し、可動であれば射出成形を開始する
。そうでなければ、更に一定時間経過さぜな後、再度ス
クリュが可動かどうか試験を行う。この時、スクリュが
可動でなければオペレータに知らせる。After maintaining that temperature for a certain period of time, it is tested to see if the screw is movable, and if it is movable, injection molding is started. If not, test again to see if the screw is movable after a certain period of time has elapsed. At this time, if the screw is not movable, notify the operator.
［実施例］ 以下に図面を参照して、本発明の詳細な説明する。[Example] The present invention will be described in detail below with reference to the drawings.
第１図は、本発明のフローチャート図である。FIG. 1 is a flowchart diagram of the present invention.
−点鎖線内が本発明の制御方法であり、その他は従来通
りの制御方法である。- The control method within the dotted chain line is the control method of the present invention, and the others are conventional control methods.
第１図〜第３図を参照して第１の実施例を説明する。A first embodiment will be described with reference to FIGS. 1 to 3.
まず、計量を開始する前に加熱シリンダ１を、その周囲
に取り付けられた加熱ヒーター〈図示せず）によって予
め定められた温度まで加熱する。First, before starting measurement, the heating cylinder 1 is heated to a predetermined temperature by a heater (not shown) attached around the heating cylinder 1.
温度調節器（図示せず）は、前記定められた温度になる
とタイマー（図示せず）を作動させ、その温度を保持す
る。When the temperature controller (not shown) reaches the predetermined temperature, it operates a timer (not shown) to maintain the temperature.
定められた時間か経過し、タイマーがタイムアツプする
と、電磁弁９が作動し、射出シリンダ７のＡ側に圧油を
流入させる。この時の圧油の圧力は、加熱シリンダ１内
の成形用樹脂３が成形可能な溶融状態のときにスクリュ
２が動く程度の圧力である。When a predetermined period of time has elapsed and the timer times up, the solenoid valve 9 is activated to allow pressure oil to flow into the A side of the injection cylinder 7. The pressure of the pressure oil at this time is such that the screw 2 moves when the molding resin 3 in the heating cylinder 1 is in a moldable molten state.
前記圧油によってスクリュ２が動いたかどうかは、スク
リュ位置検出装置５によって検出する。A screw position detection device 5 detects whether the screw 2 is moved by the pressure oil.
スクリュ２の位置に変化があれば駆動可能であると判断
して、インターロックを解除して、オイルモータを駆動
し、計量を開始する。スクリュ２の位置が変化しなけれ
ば、カウンター（図示せず）をト１する。カウンターの
カウント数が予め定めた値に達していなければ再度タイ
マーをスタートさせ、一定時間所定の温度に保持する。If there is a change in the position of the screw 2, it is determined that the screw 2 can be driven, the interlock is released, the oil motor is driven, and metering is started. If the position of the screw 2 does not change, turn a counter (not shown). If the count on the counter does not reach a predetermined value, the timer is restarted and the temperature is maintained at a predetermined temperature for a certain period of time.
その後、再び電磁弁９を作動させ圧油によってスクリュ
２を動かしてみる。一方、カウンターのカウント数が予
め定めた値になると、スクリュ回転不能をオペレータに
知らせる。After that, try operating the solenoid valve 9 again to move the screw 2 using pressure oil. On the other hand, when the count number on the counter reaches a predetermined value, the operator is notified that the screw cannot be rotated.
第１図、第４図及び第５図を参照して本発明の第二の実
施例を説明する。A second embodiment of the present invention will be described with reference to FIGS. 1, 4, and 5.
計量開始前に加熱シリンダ１をヒーターで加熱し、タイ
マーによって一定時間経過さぜな後、電磁弁９を作動さ
せオイルモータ５に圧油を流入させる。この時の圧油は
スクリュ等を破損しない程度の弱い圧力である。Before starting measurement, the heating cylinder 1 is heated with a heater, and after a certain period of time has elapsed using a timer, the solenoid valve 9 is operated to cause pressure oil to flow into the oil motor 5. The pressure oil used at this time is weak enough not to damage the screw etc.
圧油の流入によりオイルモータ４が回転するかどうかを
回転検出器８によって検出し、回転するならば、インタ
ーロックを解除して、オイルモータを回転させ計量を開
始し、回転しなければ第一の実施例と同様にタイマを再
び作動させ、一定時間が経過した後、圧油をオイルモー
タに流入させスクリュが回転するかどうか試し、回転し
ない場合はオペレータに知らせる。第一の実１＠例と同
じく、再度タイマを作動させるのか、オペレータに知ら
せるのかはカウンターのカウント数によって行なわれる
。The rotation detector 8 detects whether the oil motor 4 rotates due to the inflow of pressure oil. If it rotates, the interlock is released and the oil motor rotates to start metering. If it does not rotate, the first As in the embodiment described above, the timer is activated again, and after a certain period of time has elapsed, pressurized oil is caused to flow into the oil motor to test whether the screw rotates, and if it does not rotate, the operator is notified. As in the first example, whether to activate the timer again or notify the operator is determined by the count number of the counter.
第２の実施例のように、オイルモータに圧油を流入さぜ
る場合は、一定圧力の圧油ではなく、除徐に圧力を上げ
ていく方法もある。この場合は、スクリュ回転検出器で
はなく、圧力変換器を用いてスクリュの回転を検出する
。予め、スクリュが可動状態であれば回転し、可動状態
でないときはスクリュ等が破損しない程度の圧力を設定
しておき、圧油の圧力を前記設定圧力まで徐々に上げて
いくと、スクリュが回転を始めた時に圧力が低下するの
で、スクリュが回転可能かどうか検出することができる
。When pressurized oil is allowed to flow into the oil motor as in the second embodiment, instead of using pressure oil at a constant pressure, there is also a method of gradually increasing the pressure. In this case, the rotation of the screw is detected using a pressure transducer instead of a screw rotation detector. If the screw is in a movable state, it will rotate, but if it is not in a movable state, the pressure is set to a level that will not damage the screw, etc., and when the pressure of the pressurized oil is gradually increased to the set pressure, the screw will rotate. Since the pressure decreases when the screw starts rotating, it is possible to detect whether the screw can rotate.
［効果］
本発明によれば、従来のスクリュ起動制御方法に、スク
リュが駆動可能かどうかを試験する過程を加えたことで
、起動の際の加熱シリンダとスクリュとの間の成形用樹
脂の溶融が不完全であることが原因となって起るスクリ
ュの折損、逆流防止装置等の破損を防ぐことができる。[Effects] According to the present invention, by adding a step of testing whether the screw can be driven to the conventional screw startup control method, the melting of the molding resin between the heating cylinder and the screw during startup is prevented. It is possible to prevent breakage of screws and damage to backflow prevention devices, etc. caused by incomplete screws.
４、簡単な図面の説明
第１図は本発明のフローチャート図、第２図、第３図は
本発明の第一の実施例を説明するための図。第４図、第
５図は本発明の第２の実施例を説明するための図。4. Brief description of the drawings FIG. 1 is a flowchart of the present invention, and FIGS. 2 and 3 are diagrams for explaining the first embodiment of the present invention. FIG. 4 and FIG. 5 are diagrams for explaining a second embodiment of the present invention.
１・・・加熱シリンダ、２・・・スクリュ、３・・・成
形用樹脂、４・・・モータ、５・・・スクリュ位置検出
装置、６・・・ピストン、７・・・射出シリンダ、８・
・・回転検出器、９・・・電磁弁。DESCRIPTION OF SYMBOLS 1... Heating cylinder, 2... Screw, 3... Molding resin, 4... Motor, 5... Screw position detection device, 6... Piston, 7... Injection cylinder, 8・
... Rotation detector, 9... Solenoid valve.
第３図 第１図 第５図Figure 3 Figure 1 Figure 5
Claims (1)
ダを予め定められた温度まで加熱し、前記温度を予め定
められた時間だけ保ち、その後インターロックを解除し
てモータを回転するスクリュ起動制御方法において、イ
ンターロックを解除する前に、前記スクリュが可動状態
にあるかどうかを試験し、駆動不可能の場合に、異常処
理を行うことを特徴とするスクリュ起動制御方法。1. Screw start control that heats the heating cylinder to a predetermined temperature when starting a screw injection molding machine, maintains the temperature for a predetermined time, and then releases the interlock to rotate the motor. A screw starting control method, characterized in that, before releasing the interlock, it is tested whether the screw is in a movable state, and if the screw cannot be driven, abnormality processing is performed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21249488A JP2602697B2 (en) | 1988-08-29 | 1988-08-29 | Screw start control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21249488A JP2602697B2 (en) | 1988-08-29 | 1988-08-29 | Screw start control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0262220A true JPH0262220A (en) | 1990-03-02 |
| JP2602697B2 JP2602697B2 (en) | 1997-04-23 |
Family
ID=16623587
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21249488A Expired - Lifetime JP2602697B2 (en) | 1988-08-29 | 1988-08-29 | Screw start control method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2602697B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11433589B2 (en) | 2018-10-02 | 2022-09-06 | Fanuc Corporation | Injection molding machine and screw control method for injection molding machine |
-
1988
- 1988-08-29 JP JP21249488A patent/JP2602697B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11433589B2 (en) | 2018-10-02 | 2022-09-06 | Fanuc Corporation | Injection molding machine and screw control method for injection molding machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2602697B2 (en) | 1997-04-23 |
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