JPS62263308A - Method for controlling extrusion pressure of vent-type extrusion spinning apparatus - Google Patents
Method for controlling extrusion pressure of vent-type extrusion spinning apparatusInfo
- Publication number
- JPS62263308A JPS62263308A JP10489186A JP10489186A JPS62263308A JP S62263308 A JPS62263308 A JP S62263308A JP 10489186 A JP10489186 A JP 10489186A JP 10489186 A JP10489186 A JP 10489186A JP S62263308 A JPS62263308 A JP S62263308A
- Authority
- JP
- Japan
- Prior art keywords
- extruder
- screw
- polymer
- pressure
- rotation 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.)
- Granted
Links
- 238000001125 extrusion Methods 0.000 title claims abstract description 8
- 238000000034 method Methods 0.000 title claims description 8
- 238000010035 extrusion spinning Methods 0.000 title 1
- 229920000642 polymer Polymers 0.000 claims description 18
- 238000009987 spinning Methods 0.000 claims description 11
- 238000001514 detection method Methods 0.000 claims description 8
- 235000003642 hunger Nutrition 0.000 claims description 5
- 230000037351 starvation Effects 0.000 claims description 5
- 239000013585 weight reducing agent Substances 0.000 claims description 3
- 230000003247 decreasing effect Effects 0.000 abstract description 2
- 239000008188 pellet Substances 0.000 description 8
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004898 kneading Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000000844 anti-bacterial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- -1 polyethylene terephthalate Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000012209 synthetic fiber Substances 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は熱可塑性ポリマーのベレットを溶融防止する押
出機の吐出圧のυ１ｍ、更に詳しくはポリマーを供給装
置を介して別個に供給するようにした飢餓状態で運転さ
れる一軸又は二軸の押出機を用いて紡糸する際の吐出圧
の制御方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention is directed to an extruder discharge pressure of υ1 m for preventing melting of thermoplastic polymer pellets, and more specifically to a system in which the polymer is separately fed through a feeding device. The present invention relates to a method for controlling discharge pressure during spinning using a single-screw or twin-screw extruder operated under starvation conditions.
（従来技術）
合成繊維の紡糸工程などでも用いられる押出機は第２図
の如くに押出機１の供給口１ａにペレットのホッパー２
を接続し押出１１のスクリュー１ｂの回転数に応じたポ
リマーペレットの供給をするようになっている。押出機
１で溶融押出されたポリマー図示していないが適宜、ブ
ースターポンプ等により昇圧された後計量ポンプ３を介
して紡糸口金パック４より紡糸されるが、かかる紡糸設
備を安定に運転するため吐出部に圧力検出（変換）器５
を設は検出信号を比例＋積分動作付圧力調節器６にフィ
ードバックし、該圧力が設定端（例えば１１００Ａ／
ｃｈｉ ）になるように押出機１のスクリュ−駆動モー
タ７の回転速度を制御することが行なわれている。(Prior art) An extruder used in the spinning process of synthetic fibers has a pellet hopper 2 at the supply port 1a of the extruder 1, as shown in Fig. 2.
is connected to supply polymer pellets according to the rotational speed of the screw 1b of the extruder 11. Although not shown, the polymer melted and extruded in the extruder 1 is appropriately pressurized by a booster pump or the like, and then spun from the spinneret pack 4 via the metering pump 3. In order to operate the spinning equipment stably, the polymer is discharged. Pressure detector (converter) 5
is set, the detection signal is fed back to the pressure regulator 6 with proportional + integral action, and the pressure is set at the setting end (for example, 1100A/
The rotational speed of the screw drive motor 7 of the extruder 1 is controlled so that the extruder 1 has a rotational speed of 1.
ところが最近のように押出機溶融ゾーンに第３図に示す
如くベントロ１Ｃを設けてエジェクターで真空に引き、
水分、不純物など除去する技術が進み押出機供給口に無
乾燥チップを供給するような事が行なわれると、供給口
の所でベレットが溶着して咬み込み不良を頻発するよう
な事が起こる。However, recently, a vent 1C is installed in the melting zone of the extruder as shown in Figure 3, and the ejector is used to create a vacuum.
As technology for removing moisture and impurities progresses and undried chips are supplied to the extruder supply port, pellets often become welded at the supply port, resulting in poor biting.
さらには最近、押出機として咬み込み性、混練性の良い
二軸押出機を使用し改質剤又は特殊マスターチップなど
をブレンドしたベレットを溶融押出することか行なわれ
るが、この場合もベレットの融点が低く押出機供給口付
近で融着してトラブルを起こすことがある。このような
問題点を解決するために上記のような応用例においては
第３図に示す如くホッパー２と押出図１の間にベレット
の定量供給袋＠８を設け、押出機１の下流の計量ポンプ
３が送出する最だけ定量供給装置８よりベレットを供給
し押出機１は飢餓状態で運転するのが普通である。Furthermore, recently, a twin-screw extruder with good biting and kneading properties has been used to melt and extrude pellets blended with modifiers or special master chips, but in this case as well, the melting point of the pellets is If the temperature is low, fusion may occur near the extruder supply port, causing trouble. In order to solve this problem, in the above application example, a metered pellet supply bag @8 is installed between the hopper 2 and the extruder 1, as shown in Fig. Normally, the extruder 1 is operated in a starvation state, with the pellets fed from the metering device 8 as much as the pump 3 sends out.
従来、かかる第３図に示すような押出機の圧力制御方式
としては実開昭５９−１７４２２５号等の方法が公知で
ある。即ち押出機１の吐出部に圧力検出（変換）器５を
設けて圧力を圧力調節器６にフィードバックし圧力が設
定値になるように定量供給装置８の駆動モータ９の回転
速度を制御するものである。この場合、押出機１の駆動
モータ７は一定速度（定量供給装置８の供給量の１．２
〜１．３倍の溶融能力の出る回転数）で運転される。Hitherto, as a pressure control system for an extruder as shown in FIG. 3, a method such as that disclosed in Japanese Utility Model Application Laid-Open No. 59-174225 is known. That is, a pressure detection (conversion) device 5 is provided in the discharge section of the extruder 1, and the pressure is fed back to the pressure regulator 6, which controls the rotational speed of the drive motor 9 of the quantitative feeding device 8 so that the pressure reaches a set value. It is. In this case, the drive motor 7 of the extruder 1 is operated at a constant speed (1.2 of the feed rate of the quantitative feed device 8).
It is operated at a rotation speed that produces ~1.3 times the melting capacity.
しかしながら、吐出圧の変動原因は必ずしも計量装置３
と定量供給装置８のバランスの崩れだけでなく、押出機
内での溶融状態の変動などによることも多く圧力変化を
定量供給装置８のフィード量で調節しようとするとかえ
って外乱を入れることにもなりかねない。特にフィード
量を変化させても吐出圧に効果が現れるまでの時間遅れ
が４０〜８０秒位あり変動が増大される。However, the cause of the fluctuation in discharge pressure is not always due to the metering device 3.
This is not only caused by an imbalance in the quantitative feeding device 8, but also by fluctuations in the molten state within the extruder, and if you try to adjust the pressure change with the feed rate of the quantitative feeding device 8, you may end up introducing disturbances instead. do not have. In particular, even if the feed amount is changed, there is a time delay of about 40 to 80 seconds until the effect appears on the discharge pressure, which increases fluctuations.
本発明者はかかる従来技術の問題点を解決するためにポ
リマーを供給装置を介して供給するようにした飢餓状態
で運転される一軸又は二軸の押出機において、押出部の
圧力を検出し該検出信号を押出機スクリュー駆動系にフ
ィードバックするとともに前記押出機スクリューの回転
速度をも検出し、該回転速度検出信号を前記供給装置の
駆動系にフィードバックすることによりポリマー供給量
をコントロールする方法を提案したく特願昭６０−２７
５０３３号明細書〉。In order to solve the problems of the prior art, the present inventor has developed a single-screw or twin-screw extruder that is operated under starvation conditions and in which polymer is fed through a feeding device, by detecting the pressure in the extrusion section. We propose a method for controlling the amount of polymer supplied by feeding back a detection signal to the extruder screw drive system and also detecting the rotation speed of the extruder screw, and feeding back the rotation speed detection signal to the drive system of the supply device. Shitaku special request 1986-27
Specification No. 5033>.
〈発明の目的〉
本発明は上記の改良された圧力制御方法を採用した一軸
又は二軸の押出装置を用いて複数個の紡糸口金より紡糸
する場合の本方式の改良に係わるものであり、その目的
とする所は紡糸ヘッド部（通常口金パックと呼ばれる事
が多い）を定期的に交換する場合に、その錘に置場的に
ポリマーを供給する定量ポンプを停止して体錘し減Ｉ！
運転を行うが、この時生じる圧力変動にもスムースに対
応しベントアップなどのトラブルなとしに運転を継続出
来る圧力制御方法を提供するものである。<Object of the invention> The present invention relates to an improvement of this method when spinning from a plurality of spinnerets using a single-screw or twin-screw extrusion device employing the above-mentioned improved pressure control method. The purpose is to stop the metering pump that locally supplies polymer to the spindle when replacing the spinning head (often called the spinneret pack) on a regular basis to reduce the amount of I!
The present invention provides a pressure control method that smoothly responds to pressure fluctuations that occur during operation and allows operation to continue without troubles such as vent-up.
〈発明の構成〉
即ち本発明はポリマ〜を供給装置を介して供給するよう
にした飢餓状態で運転される一軸又は二軸の押出機によ
り溶融押出するとともに押出部の圧力を検出して該検出
信号を押出機スクリュー駆動系にフィードバックし、更
に前記押出部スクリューの回転速度を検出し該回転速度
検出信号を前記ポリマー供給装置の駆動系にフィードバ
ックすることによりポリマー供給量をコントロールする
ようにした複数個の紡糸ヘッドを有する紡糸磯を減錘す
る際に、減錘に対応して前記ポリマー供給装置の設定値
を変更するとともに一定時間、前記ポリマー供給装置の
駆動系のフィードバックゲインを小さくすることを特徴
とする。<Structure of the Invention> That is, the present invention melt-extrudes a polymer by using a single-screw or twin-screw extruder that is operated under starvation conditions and supplies the polymer through a feeding device, and at the same time detects the pressure at the extrusion section. A plurality of systems configured to feed back a signal to the extruder screw drive system, further detect the rotational speed of the extruder screw, and feed back the rotational speed detection signal to the drive system of the polymer feeding device to control the polymer supply amount. When reducing the spindle of a spinning mill having several spinning heads, the setting value of the polymer supply device is changed in accordance with the weight reduction, and the feedback gain of the drive system of the polymer supply device is reduced for a certain period of time. Features.
（実施例） 以゛下本発明の実施例を第１図により説明する。(Example) An embodiment of the present invention will be described below with reference to FIG.
第１図で１０が二軸押出機のスクリュー１ｂを駆動すモ
ータ７に設けた回転速度検出器（タコジェネレータ）で
あり、１１は回転速度制ｔＩｌ装置である。In FIG. 1, 10 is a rotational speed detector (tacho generator) provided on the motor 7 that drives the screw 1b of the twin-screw extruder, and 11 is a rotational speed control device.
回転速度検出器１０の検出信号は回転速度制りＵ装置１
１にフィードバックし、スクリュー駆動モータ７の回転
速度が設定値になるように定量洪給装置８の駆動モータ
９を制御する。この場合、定量供給装置８の初期の設定
値（実際には駆動モータ８の初期の回転数設定値）は定
量ポンプ３のフィード量に合わせておくことは言うまで
もないが、それぞれに若干のバラツキがあり時々刻々、
微小ながらバランスが崩れる。そこで押出機１内で起こ
る溶融量変動などの外乱に対しては吐出圧力検出器５の
信号を圧力調節器６にフィードバックして、スクリュー
駆動モータ７の回転速度を制御して補正するが、定量供
給装置８のフィード量と計量ポンプ３の取出量のバラン
スが崩れた場合、スクリュー回転数が初期設定値から徐
々にシフトした所でバランスしようとするのでこれを元
の設定値に回復させるように回転速度制菌装置１１が動
作し定量供給装置８の駆動モータ９を制御しバランスを
回復させる。前述の如く定量供給装置８の変化が吐出圧
力検出器５に影響を与えるまでの時間遅れ［はＬ−４０
〜８０秒とかなり長いので、実施例の回転速度ｉ、ｉｌ
陣装置１１は回転速度検出器１０の信号をフィルター
を通して平均化したのち一定時間（たとえば５秒）毎に
サンプリングし設定値との偏差に対して比例動作をし出
力を次のサンプリング時まで保持するようにしである。The detection signal of the rotation speed detector 10 is the rotation speed control U device 1.
1, and controls the drive motor 9 of the metering dosing device 8 so that the rotational speed of the screw drive motor 7 reaches the set value. In this case, it goes without saying that the initial setting value of the metering supply device 8 (actually, the initial rotation speed setting value of the drive motor 8) should be matched to the feed rate of the metering pump 3, but there may be slight variations in each. From moment to moment,
The balance is slightly disrupted. Therefore, the signal from the discharge pressure detector 5 is fed back to the pressure regulator 6 and the rotational speed of the screw drive motor 7 is controlled to compensate for disturbances such as fluctuations in the amount of melt that occur within the extruder 1. If the balance between the feed amount of the supply device 8 and the output amount of the metering pump 3 is lost, the screw rotation speed will gradually shift from the initial setting value to try to balance it, so this should be restored to the original setting value. The rotational speed antibacterial device 11 operates to control the drive motor 9 of the metering device 8 to restore balance. As mentioned above, there is a time delay until a change in the quantitative supply device 8 affects the discharge pressure detector 5 [is L-40].
Since it is quite long at ~80 seconds, the rotation speed i, il in the example
The control device 11 averages the signal from the rotational speed detector 10 through a filter, samples it at fixed time intervals (for example, 5 seconds), operates proportionally to the deviation from the set value, and holds the output until the next sampling time. That's how it is.
上記の構成により定常時は押出機１の吐出圧をきわめて
安定に制御することが出来るが、第１図にも示す通りか
かる押出量を用いた紡糸Ｗ２ ｆ？ｆ、では通常紡糸口
金パック４は複数個あり、紡糸口金パック４をフィルタ
ー詰りなどを未然に防ぐため定期的に交換する場合、１
個ずつ計量ポンプ３を停止しては交換し再起動する。計
（ｄポンプ３を停止すると、この場合も圧力制御装背が
動いて圧力変動はほとんどないが、過渡的に２分間程度
スクリュー回転数が大きく変動しくＲ大２０％程度下が
る）押出機の混練性が変わって糸の品質を損うばかりか
押出機１でベントアップが起こりベントロ１Ｃを閉塞す
るなどのトラブルを誘起することすらある。With the above configuration, the discharge pressure of the extruder 1 can be controlled extremely stably during steady state, but as shown in FIG. 1, the spinning W2 f? In f, there are usually a plurality of spinneret packs 4, and when the spinneret packs 4 are replaced periodically to prevent filter clogging, one
The metering pump 3 is stopped one by one, replaced, and restarted. (When d pump 3 is stopped, the pressure control device moves in this case as well, so there is almost no pressure fluctuation, but the screw rotation speed fluctuates significantly for about 2 minutes and R drops by about 20%) Kneading in the extruder Not only does this change the properties of the yarn, impairing the quality of the yarn, but it may even cause problems such as venting in the extruder 1 and clogging the vent hole 1C.
本発明ではかかる問題点解決のため計量ポンプ３を停止
する直前（例えば５〜１５秒前）に減錘信号を送ってや
り（スイッチ操作）、定量供給装置２の初期設定値を停
止する計量ポンプ３の取出量分だけ下げるとともに一定
時間のみくたとえば３０秒間）制御装置１１のフィード
バックゲインを小さくして（たとえば零）、その時間だ
けほとんどスクリューの回転数制御のみにより圧力制御
するものである。In order to solve this problem, the present invention sends a weight reduction signal (switch operation) immediately before stopping the metering pump 3 (for example, 5 to 15 seconds), and the metering pump stops the initial setting value of the metering pump 2. 3, the feedback gain of the control device 11 is made small (for example, zero) for a certain period of time, for example, 30 seconds, and the pressure is controlled almost exclusively by controlling the rotational speed of the screw for that time.
このような第１図に示す装置を用いて［η］＝０．６２
のポリエチレンテレフタレートを常法により９ケの口金
４から溶融紡糸する際に計量ポンプ３の吐出量を３７０
ｇ／分、スクリュー回転速度設定値を１１００ｒｐ （
この時の押出灘溶融吐出能力は４．７５８９）、吐出圧
設定値を２０８９ ／ ｃｒａ 、時間遅れＬを６０秒
とした条件で運転したとき、吐出変動を±３ Ｋ３ ／
ｃｒＡに制御することができた。更に口金パック交換
のため１錘の計量ポンプを停止した場合も一時的にスク
リュー回転数が８％はど低下したが、吐出圧力の変動は
±３ Ｋ９ ／ ｃｍであり定常時と全く変らなかった
。又スクリュー回転数も４０秒後には安定し±２％変動
内に入った。Using the apparatus shown in Figure 1, [η] = 0.62
When polyethylene terephthalate is melt-spun from nine spinnerets 4 by a conventional method, the discharge amount of the metering pump 3 is
g/min, screw rotation speed setting value 1100 rpm (
At this time, the extrusion sea melt discharge capacity was 4.7589), the discharge pressure set value was 2089/cra, and when operating under the conditions that the time delay L was 60 seconds, the discharge fluctuation was ±3 K3/
could be controlled by crA. Furthermore, when one metering pump was stopped to replace the nozzle pack, the screw rotation speed temporarily decreased by 8%, but the variation in discharge pressure was ±3 K9/cm, which was no different from the steady state. . The screw rotation speed also stabilized after 40 seconds and fell within ±2% fluctuation.
（発明の効果）
以上に説明の如く本発明によれば押出機１内で起こる外
乱による圧力変動は圧力調節器６により補正されるし定
石供給装置８の供給量変化などの外乱による圧力変化は
回転速度制郭装置１１により補正され極めて安定な吐出
圧力の制御が可能となるだりでなく、計量ポンプを停止
して紡糸口金パック４を交換するような場合ら押出機１
のスクリュー回転数、定量供給装置の２の供給湯をそれ
ほど変えずに吐出圧を一定に制郭出来る。(Effects of the Invention) As explained above, according to the present invention, pressure fluctuations caused by disturbances occurring within the extruder 1 are corrected by the pressure regulator 6, and pressure changes caused by disturbances such as changes in the supply amount of the fixed-size feeding device 8 are compensated for by the pressure regulator 6. The extruder 1 is not only corrected by the rotational speed restricting device 11 to enable extremely stable control of the discharge pressure, but also when the metering pump is stopped and the spinneret pack 4 is replaced.
It is possible to control the discharge pressure to a constant level without changing the number of screw rotations or the hot water supplied by the quantitative supply device.
第１図は本発明の実施例を示す慨略説明図、第２図およ
び第３図は各々従来の実施〃１を示す概略説明図である
。１は押出機、３は計量ポンプ、５は吐出圧力検出器、
６は圧力調節器、７はスクリュー駆動モータ、８は定量
供給装置、９Ｉま定量供給装置の駆動モータ、 １０は
スクリュー駆動モータ７の回転速度検出器、１１は回転
速度制ｉ１１装近である。FIG. 1 is a schematic explanatory diagram showing an embodiment of the present invention, and FIGS. 2 and 3 are schematic explanatory diagrams showing conventional embodiment 1, respectively. 1 is an extruder, 3 is a metering pump, 5 is a discharge pressure detector,
6 is a pressure regulator, 7 is a screw drive motor, 8 is a quantitative feeder, 9I is a drive motor of the quantitative feeder, 10 is a rotational speed detector for the screw drive motor 7, and 11 is a rotational speed controller i11.
Claims (1)
態で運転される一軸又は二軸のベント式押出機ににより
溶融押出するとともに押出部の圧力を検出し該検出信号
を押出機スクリュー駆動系にフィードバックし、更に前
記押出機スクリューの回転速度を検出し、該回転速度検
出信号を前記ポリマー供給装置の駆動系にフィードバッ
クすることによりポリマー供給量をコントロールするよ
うにした複数個の紡糸ヘッドを有する紡糸機を減錘する
際に、減錘に対応して前記ポリマー供給装置の設定値を
変更するとともに一定時間、前記ポリマー供給装置の駆
動系へのフィードバックゲインを小さくすることを特徴
とするベント式押出紡糸機への吐出圧力制御方法。The polymer is melt-extruded by a single-screw or twin-screw vented extruder that is operated under starvation conditions and is supplied via a feeding device, and the pressure in the extrusion section is detected and the detection signal is sent to the extruder screw drive system. Spinning having a plurality of spinning heads configured to feed back the rotation speed of the extruder screw, further detect the rotation speed of the extruder screw, and control the polymer supply amount by feeding back the rotation speed detection signal to the drive system of the polymer supply device. A vent type extruder characterized in that when the weight of the machine is reduced, the set value of the polymer supply device is changed in accordance with the weight reduction, and the feedback gain to the drive system of the polymer feed device is reduced for a certain period of time. Method for controlling discharge pressure to a spinning machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10489186A JPS62263308A (en) | 1986-05-09 | 1986-05-09 | Method for controlling extrusion pressure of vent-type extrusion spinning apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10489186A JPS62263308A (en) | 1986-05-09 | 1986-05-09 | Method for controlling extrusion pressure of vent-type extrusion spinning apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62263308A true JPS62263308A (en) | 1987-11-16 |
| JPH0373648B2 JPH0373648B2 (en) | 1991-11-22 |
Family
ID=14392789
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10489186A Granted JPS62263308A (en) | 1986-05-09 | 1986-05-09 | Method for controlling extrusion pressure of vent-type extrusion spinning apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62263308A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5372765A (en) * | 1993-06-01 | 1994-12-13 | Chi Mei Corporation | Continuous process for extrusion of thermoplastic resin |
| DE102009043180A1 (en) | 2008-10-17 | 2010-04-22 | Oerlikon Textile Gmbh & Co. Kg | Melt spinning device for melt spinning of synthetic fibers to produce filaments, has balancing pump connected with control device and supplying portion of molten mass based on delivery volume of dosing pumps |
-
1986
- 1986-05-09 JP JP10489186A patent/JPS62263308A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5372765A (en) * | 1993-06-01 | 1994-12-13 | Chi Mei Corporation | Continuous process for extrusion of thermoplastic resin |
| DE102009043180A1 (en) | 2008-10-17 | 2010-04-22 | Oerlikon Textile Gmbh & Co. Kg | Melt spinning device for melt spinning of synthetic fibers to produce filaments, has balancing pump connected with control device and supplying portion of molten mass based on delivery volume of dosing pumps |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0373648B2 (en) | 1991-11-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |