JPH0529731U - Vent extruder - Google Patents

Vent extruder

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Publication number
JPH0529731U
JPH0529731U JP079692U JP7969291U JPH0529731U JP H0529731 U JPH0529731 U JP H0529731U JP 079692 U JP079692 U JP 079692U JP 7969291 U JP7969291 U JP 7969291U JP H0529731 U JPH0529731 U JP H0529731U
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JP
Japan
Prior art keywords
vent
temperature
temperature sensor
resin
heat
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
Application number
JP079692U
Other languages
Japanese (ja)
Inventor
秀之 那須
Original Assignee
積水化学工業株式会社
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 積水化学工業株式会社 filed Critical 積水化学工業株式会社
Priority to JP079692U priority Critical patent/JPH0529731U/en
Publication of JPH0529731U publication Critical patent/JPH0529731U/en
Pending legal-status Critical Current

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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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/92—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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92009—Measured parameter
    • B29C2948/92209—Temperature
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92323—Location or phase of measurement
    • B29C2948/92361—Extrusion unit
    • B29C2948/92419—Degassing unit
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/92704—Temperature
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92819—Location or phase of control
    • B29C2948/92857—Extrusion unit
    • B29C2948/92914—Degassing unit

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

(57)【要約】 【目的】 ベント部周辺の温度変化を、温度センサ−の
感熱部を樹脂に接触することなしに、ベント部周辺の温
度変化で検知し、ベントアップを早期に知ることのでき
るベント押出機を提供すること。 【構成】 ベント孔３直下のスクリュ−フライトのすぐ
上に感熱部８が来るよう温度センサ−７を設置し、ベン
トアップによる温度上昇により、設定温度に達した時、
信号を出して温度センサー７が上方に移動するようにし
たベント押出機。 (57) [Summary] [Purpose] The temperature change around the vent part can be detected early by detecting the temperature change around the vent part without contacting the heat sensitive part of the temperature sensor with the resin. To provide a vent extruder capable of performing. [Structure] A temperature sensor 7 is installed so that the heat-sensitive part 8 is located immediately above the screw flight immediately below the vent hole 3, and when the temperature rises due to venting up and the set temperature is reached,
A vent extruder that outputs a signal so that the temperature sensor 7 moves upward.

Description

【考案の詳細な説明】[Detailed description of the device]

【０００１】[0001]

【産業上の利用分野】[Industrial applications]

本考案は、ベント押出機の改良に関するものである。 The present invention relates to an improved vent extruder.

【０００２】[0002]

【従来の技術】[Prior Art]

押出工程中に材料の合成樹脂中の水分や揮発分を除去しようとする場合、ベン ト押出機が用いられることが多い。ベント押出機においては、バレルの途中に一 個または複数個のベント孔を設けるとともに、ベント孔周辺のスクリュ−溝や排 気室を減圧とし、さらに、ベント孔の直下及びその先端側数ピッチのスクリュ− の輸送能力をベント孔より根元側のスクリュ−の輸送能力よりも大きくする構造 をとっており、そのことによりベント孔直下のスクリュ−溝を樹脂で充満しない 状態で押出を行いつつ、合成樹脂中の水分や揮発分を除去している。 Bent extruders are often used when attempting to remove water and volatiles in the synthetic resin of the material during the extrusion process. In a vent extruder, one or more vent holes are provided in the middle of the barrel, and the screw groove and exhaust chamber around the vent holes are decompressed. The structure is such that the transport capacity of the screw is greater than the transport capacity of the screw on the root side of the vent hole, which allows the resin to be extruded while the screw groove just below the vent hole is not filled with resin, Removes water and volatiles from the resin.

【０００３】 ところが、長時間操業を続けていると、押出機先端に設置したスクリ−ンがゴ ミなどで詰まって流動抵抗が増し、この抵抗に打ち勝つ圧力の増加を得るため、 溶融長（スクリュ−溝が溶融樹脂で充満した部分の長さ、スクリュ−先端を起点 として測る）は次第に増大し、ついにはベント孔直下のスクリュ−溝も溶融樹脂 で充満し、さらには、ベント孔や排気室にも樹脂が溢れ、ベント部が閉塞される 結果となる。この現象はベントアップと呼ばれている。However, when the operation is continued for a long time, the screen installed at the tip of the extruder is clogged with dust or the like to increase the flow resistance, and the pressure to overcome this resistance is increased. -The length of the groove filled with molten resin, measured from the screw tip as the starting point) gradually increases, until the screw groove immediately below the vent hole is also filled with molten resin, and the vent hole and exhaust chamber Also, the resin overflows and the vent is blocked. This phenomenon is called bent up.

【０００４】 ベントアップの状態になると、ベント押出機の基本機能である樹脂から水分や 揮発分を除去する能力が失われてしまうので非常に問題である。さらに、このよ うな問題が起こってしまってからでは、押出機を停止してスクリ−ン交換を行う 必要性が生ずるだけでなく、閉塞したベント孔や排気室の掃除にも長い時間がか かり問題が大きい。In the vent-up state, the ability to remove water and volatile components from the resin, which is the basic function of the vent extruder, is lost, which is a serious problem. Furthermore, after such a problem occurs, not only the extruder needs to be stopped and the screen needs to be replaced, but it also takes a long time to clean the blocked vent hole and the exhaust chamber. The problem is big.

【０００５】 実開昭５５−１０２５２３号公報には、図２で概要を示すとおり、バイメタル 式、白金抵抗式、サ−ミスタ−式、熱電対式のような接触式の温度センサ−７を 用い、ベントアップ時に排気室４を溢流する溶融樹脂の温度を測定して正常押出 時との温度変化を検知し、警報を発する装置が提案されている。この提案によれ ば、作業者が常に監視していなくても、ベントアップが生じたことを知ることが できる。しかし、温度センサ−７の感熱部８が溶融樹脂に接触してからベントア ップを知るのでは、タイミングとしては遅く、また感熱部８に接触して固着した 樹脂を除去するために長い時間を費やしてしまうという問題があった。In Japanese Utility Model Publication No. 55-102523, as shown in FIG. 2, a contact type temperature sensor 7 such as a bimetal type, a platinum resistance type, a thermistor type and a thermocouple type is used. There has been proposed a device which measures the temperature of the molten resin overflowing the exhaust chamber 4 at the time of venting up, detects a temperature change from that during normal extrusion, and issues an alarm. According to this proposal, it is possible to know that a vent up has occurred even if the worker does not constantly monitor. However, if the vent-up is known after the heat-sensitive part 8 of the temperature sensor 7 comes into contact with the molten resin, the timing is late, and it takes a long time to remove the resin stuck to the heat-sensitive part 8 in contact with it. There was a problem of spending it.

【０００６】 この考案では、このような問題を避けるため、溶融樹脂の近接を温度上昇によ って検知し、検出温度の適切な設定によって所望温度において検出するという方 法により、非接触式でベントアップを検知することもできると記載されている。 しかし、このような方法で測定されるのは、樹脂から発生する揮発分の蒸気温度 であり、ベントアップした樹脂の温度ではない。また揮発分の蒸気温度は、ベン ト孔や排気室の壁に接触して次第に低下する。従って、測定している温度は、ベ ントアップした樹脂の温度よりもかなり低くなる。さらに正常押出時の樹脂温度 とベントアップ時の樹脂温度との差はそれ程大きいものではない。このような条 件下で、接触式温度センサ−の感熱部を用い非接触の状態で必要な精度の樹脂温 度測定を行うためには、感熱部８とベントアップした樹脂との距離がかなり近接 することが必要である。しかし感熱部８と溶融樹脂が余り近接すると、接触して 感熱部に樹脂が付着してしまうトラブルが発生する危険がある。In order to avoid such a problem, in the present invention, the proximity of the molten resin is detected by the temperature rise, and it is detected at a desired temperature by appropriately setting the detection temperature. It is described that vent up can also be detected. However, what is measured by such a method is the vapor temperature of the volatile components generated from the resin, not the temperature of the vented resin. In addition, the vapor temperature of the volatile matter gradually decreases when it contacts the vent hole and the wall of the exhaust chamber. Therefore, the temperature being measured is much lower than the temperature of the bent resin. Further, the difference between the resin temperature during normal extrusion and the resin temperature during vent up is not so large. Under such conditions, in order to measure the resin temperature with the required accuracy in the non-contact state using the heat-sensitive part of the contact-type temperature sensor, the distance between the heat-sensitive part 8 and the vented resin is considerably large. Proximity is required. However, if the heat-sensitive part 8 and the molten resin are too close to each other, there is a risk that the resin may adhere to the heat-sensitive part due to contact with each other.

【０００７】[0007]

【考案が解決しようとする課題】[Problems to be solved by the device]

以上述べたように、接触式温度センサ−の感熱部を用いる方法では、ベントア ップの発生を知るタイミングとしては遅く、また感熱部に固着した樹脂を取り除 くのに長時間を要するという問題がある。さらに、接触式の感熱部を用いて非接 触でベントアップを早期に検知するためには、感熱部を溶融樹脂に近づけること が必要であり、これはベントアップ時に感熱部に溶融樹脂が接触し、付着してし まう危険を伴う。以上のような理由から、感熱部への樹脂の付着を避けつつ、ベ ントアップした溶融樹脂の温度を非接触式で測定し、ベントアップを早期に検知 することが求められていた。 As described above, in the method using the heat-sensitive part of the contact-type temperature sensor, the timing to know the occurrence of the vent up is late, and it takes a long time to remove the resin stuck to the heat-sensitive part. There is. Furthermore, in order to detect vent-up early without contact using the contact-type heat-sensitive part, it is necessary to bring the heat-sensitive part close to the molten resin. However, there is a risk of adhesion. For the above reasons, it has been required to detect the bent-up early by measuring the temperature of the bent-up molten resin by a non-contact method while avoiding the adhesion of the resin to the heat-sensitive part.

【０００８】[0008]

【課題を解決するための手段】[Means for Solving the Problems]

本考案の考案者は、以上の諸点につき種々検討した結果、排気室内に設けた温 度センサ−により、正常のベント押出時とベントアップ時のベント孔周辺の温度 変化を検知してベントアップを発見すべく、温度センサ−を上下方向に可動とし 、該温度センサ−が設定温度に達した時、これを上方に移動せしめる機構を備え ることにより、上述の課題を解決し得ることを見出した。 As a result of various studies on the above points, the inventor of the present invention detects the temperature change around the vent hole during normal vent extrusion and vent up by a temperature sensor installed in the exhaust chamber to vent up. In order to discover, it was found that the above-mentioned problems can be solved by making the temperature sensor movable in the vertical direction and providing a mechanism for moving the temperature sensor upward when the temperature reaches a set temperature. ..

【０００９】 すなわち本考案のベント押出機は、バレルにベント孔が設けられ、該ベント孔 に連通する排気室が備えられ、該排気室内に温度センサーが上下可動に排気室内 に設けられていることを特徴としている。That is, in the vent extruder of the present invention, a vent hole is provided in the barrel, an exhaust chamber communicating with the vent hole is provided, and a temperature sensor is vertically movable inside the exhaust chamber. Is characterized by.

【００１０】 上記温度センサーとしては、バイメタル式、白金抵抗式、サ−ミスタ−式、熱 電対式のような接触式の温度センサーまたは赤外線検知式温度センサ−などの非 接触式の温度センサーが用いられる。As the temperature sensor, a contact type temperature sensor such as a bimetal type, a platinum resistance type, a thermistor type, a thermocouple type, or a non-contact type temperature sensor such as an infrared detection type temperature sensor is used. Used.

【００１１】 この考案のベント押出機を稼働するにあたり、上記温度センサーの上下動は次 のとおりに作動させる。 すなわち、正常のベント押出時には、ベント押出機のベント孔付近のスクリュ −溝に溶融樹脂は充満していない。そこで、温度センサ−を下降させてその感熱 部を溶融樹脂にできるだけ接近させ、感熱部の先端がスクリュ−フライトの外周 付近に来るようする。このような状態で通常のベント押出時の温度測定を行う。In operating the vent extruder of the present invention, the vertical movement of the temperature sensor is operated as follows. That is, during normal vent extrusion, the screw groove near the vent hole of the vent extruder is not filled with the molten resin. Therefore, the temperature sensor is lowered so that the heat-sensitive part is as close as possible to the molten resin, and the tip of the heat-sensitive part is located near the outer periphery of the screw flight. In such a state, temperature measurement during normal vent extrusion is performed.

【００１２】 一旦ベントアップが始まると、スクリュ−溝内の溶融樹脂は、その温度が上昇 するとともに、ベント孔部分のスクリュ−溝を充満し始める。温度センサーの位 置をそのままにしておけば、その感熱部と溶融樹脂の間隔は狭まり、温度センサ −の温度も上昇する。最後に温度センサ−が溢れた溶融樹脂に接触した時の温度 センサ−の温度が、ベントアップした溶融樹脂の温度となるが、この溶融樹脂の 温度は、押出製品の種類、樹脂の種類、押出量が決まっていれば大略一定と見な すことができ、予め測定しておくことも可能である。そこで、温度センサ−の感 熱部と溶融樹脂は接触させず、温度センサ−の設定温度を上述の樹脂温度よりも 低い適当な値に決めておき、その設定温度になった時、信号を出して温度センサ −を上方へ引き上げるようにする。この設定温度は上述の樹脂温度にできるだけ 近いことが望ましいが、余り近いと感熱部が溶融樹脂に接触する危険があるので 、この点を考慮して経験的、実験的に決定する。Once the vent-up starts, the temperature of the molten resin in the screw groove rises and the molten resin in the vent hole portion starts to fill the screw groove. If the position of the temperature sensor is left as it is, the distance between the heat-sensitive part and the molten resin will be narrowed and the temperature of the temperature sensor will rise. The temperature of the temperature sensor when the temperature sensor comes into contact with the overflowed molten resin is the temperature of the molten resin that has vented up.The temperature of this molten resin depends on the type of extruded product, the type of resin, and the extruded product. If the amount is fixed, it can be regarded as almost constant, and it is possible to measure it in advance. Therefore, the heat-sensitive part of the temperature sensor and the molten resin are not brought into contact with each other, the temperature set for the temperature sensor is set to an appropriate value lower than the resin temperature described above, and a signal is output when the set temperature is reached. So that the temperature sensor can be pulled upward. It is desirable that this set temperature be as close as possible to the above-mentioned resin temperature, but if it is too close, there is a danger that the heat-sensitive part will come into contact with the molten resin.

【００１３】[0013]

【作用】[Action]

温度センサーが排気室内で上下動可能にされているので、上記のとおりに温度 センサーを上下動させることにより、温度センサーの感熱部と溶融樹脂を接触さ せることなくベントアップ時の温度変化を検出でき、ベントアップが始まったこ とを知ることができる。 Since the temperature sensor can be moved up and down in the exhaust chamber, by moving the temperature sensor up and down as described above, the temperature change at vent up can be detected without contacting the thermosensitive part of the temperature sensor with the molten resin. Yes, you can know that the vent up has begun.

【００１４】[0014]

【実施例】【Example】

図１は、本考案のベント押出機の一実施例のベント部を示す断面図である。 図１において、１はスクリュー、２はバレル、３はベント孔、４は排気室、７ は温度センサ−、８は温度センサーの感熱部をそれぞれ示している。 FIG. 1 is a sectional view showing a vent portion of an embodiment of the vent extruder of the present invention. In FIG. 1, 1 is a screw, 2 is a barrel, 3 is a vent hole, 4 is an exhaust chamber, 7 is a temperature sensor, and 8 is a heat-sensitive part of the temperature sensor.

【００１５】 温度センサー７は、排気室４の上部の天板に取着した温度センサー上下動装置 ９に上下動可能に取り付けられている。このセンサ−上下動装置９としては、例 えば、電気信号で働く流体圧シリンダ−が使用される。The temperature sensor 7 is vertically movably attached to a temperature sensor vertical movement device 9 attached to a top plate of the upper portion of the exhaust chamber 4. As this sensor-vertical movement device 9, for example, a fluid pressure cylinder that works with an electric signal is used.

【００１６】 また、排気室４の側壁には排気孔が穿設され、この排気孔に、真空ポンプ６に 連結された排気管５が接続され、排気室４、ベント孔３及びその直下部分を減圧 するようにされている。Further, an exhaust hole is formed in a side wall of the exhaust chamber 4, and an exhaust pipe 5 connected to a vacuum pump 6 is connected to the exhaust hole to connect the exhaust chamber 4, the vent hole 3 and a portion directly below the exhaust chamber 4. It is designed to reduce the pressure.

【００１７】 このベント押出機においては、押出スクリュ−１の回転により、スクリュ−溝 内の樹脂は、バレル２に備えた図示していないヒ−タ−により加熱されつつ図１ の右から左へ移送される。In this vent extruder, the rotation of the extrusion screw-1 causes the resin in the screw groove to be heated by a heater (not shown) provided in the barrel 2 from right to left in FIG. Be transferred.

【００１８】 正常の運転時には、真空ポンプ６により排気管５を通して排気室４とベント孔 ３及びその下のスクリュ−溝を減圧にすることにより、ベント孔下のスクリュ− 溝の溶融樹脂に含まれる揮発分や水分を除去することができる。ベント孔３部分 のスクリュ−溝表面温度もしくは樹脂の温度は、ベント孔３を通してスクリュ− フライトの直上に設置された温度センサ−７の感熱部８により測定される。During normal operation, the vacuum chamber 6 reduces the pressure in the exhaust chamber 4, the vent hole 3, and the screw groove below it through the exhaust pipe 5, so that the resin contained in the molten resin in the screw groove below the vent hole. It can remove volatile components and water. The temperature of the screw groove surface in the vent hole 3 portion or the temperature of the resin is measured by the heat-sensitive section 8 of the temperature sensor 7 installed directly above the screw flight through the vent hole 3.

【００１９】 押出に用いる樹脂としては、硬質塩化ビニル系樹脂配合物を用いた。しかし、 適用可能な樹脂は硬質塩化ビニル系樹脂配合物に止まらず、各種の合成樹脂を使 用することが可能である。As the resin used for extrusion, a hard vinyl chloride resin compound was used. However, applicable resins are not limited to hard vinyl chloride resin blends, and various synthetic resins can be used.

【００２０】 また、押出機の先端には、絞り弁をつけた金型を取りつけ押出機内の圧力を調 整した。この圧力が生産用金型を取りつけた場合に対応する値を取る範囲では正 常なベント押出が行われ、接触式の温度センサ−７で測定された温度は、１５０ 〜１６０℃であった。ところが絞り弁を閉めて行くと次第に溶融長は長くなり、 ついにはベントアップが発生した。ベントアップ発生後温度センサ−７の温度は 急速に上昇した。そこで、温度センサ−の設定温度を１７２℃に設定した。温度 センサ−７の測定温度がこの１７２℃に達した時、電気信号が発せられ、温度セ ンサ−上下動装置９が働いて、温度センサー７は上方へ移動した。この結果、セ ンサ−７の感熱部８が溶融樹脂と接触することはなくなった。また、同時にベン トアップが発生した旨の警報が出され、これと同調して自動的にフィ−ダ−の樹 脂供給量を少なくすることにより、ベントアップの状態から正常運転への復帰が 完全自動で進められた。A mold with a throttle valve was attached to the tip of the extruder to adjust the pressure inside the extruder. Normal vent extrusion was performed in a range where this pressure had a value corresponding to the case where the production mold was attached, and the temperature measured by the contact type temperature sensor-7 was 150 to 160 ° C. However, as the throttle valve was closed, the melting length gradually became longer, and finally vent up occurred. After venting up, the temperature of the temperature sensor-7 rose rapidly. Therefore, the set temperature of the temperature sensor is set to 172 ° C. When the temperature measured by the temperature sensor-7 reached 172 ° C., an electric signal was emitted, the temperature sensor up / down device 9 worked, and the temperature sensor 7 moved upward. As a result, the heat-sensitive portion 8 of the sensor 7 is no longer in contact with the molten resin. At the same time, an alarm indicating that a vent up has occurred is automatically generated, and in synchronization with this, the amount of resin supplied to the feeder is automatically reduced to completely restore the normal operation from the vent up state. It proceeded automatically.

【００２１】 このようにして接触式の温度センサ−を用い、非接触式で温度測定を行ってベ ントアップを検知し、それに基づいた処置をとることができ、ベントアップを防 止することができることが確認された。As described above, the contact-type temperature sensor is used to measure the temperature in a non-contact manner to detect the bent-up, and the treatment based on the detected bent-up can be taken to prevent the vent-up. Was confirmed.

【００２２】[0022]

【考案の効果】 本考案によれば、非接触でベントアップ時の温度変化を検出できるので、従来 のような温度センサーへの樹脂の固着の問題が全くない。従って、温度センサー が溶融樹脂に接触することによる検出能力の低下の問題や、温度センサーへの固 着樹脂の取り除き作業の問題がなくなる。EFFECTS OF THE INVENTION According to the present invention, since the temperature change at the time of venting up can be detected in a non-contact manner, there is no problem of resin sticking to the temperature sensor as in the conventional case. Therefore, there is no problem of a decrease in detection ability due to the temperature sensor coming into contact with the molten resin, and a problem of work for removing the solidified resin from the temperature sensor.

【００２３】 また、本考案では、温度センサーと溶融樹脂との接触の問題がなくなるので、 温度センサーの感熱部を溶融樹脂のすぐ近くに設置することが可能となる。その 結果、ベント部のスクリュ−溝内の溶融樹脂のわずかな温度変化でも捕らえこと ができ、ベントアップの早期発見につながり、ベントアップを回避して正常の運 転に完全自動で戻すアクションを取れることになる。従って、本考案のベント押 出機においては、ベントアップを発見し、警報を発することが可能となったばか りでなく、正常運転への復帰を無人、完全自動で行うことも可能となる。Further, in the present invention, since the problem of contact between the temperature sensor and the molten resin is eliminated, it is possible to install the heat-sensitive part of the temperature sensor in the immediate vicinity of the molten resin. As a result, even a slight temperature change of the molten resin in the screw groove of the vent part can be caught, leading to early detection of vent up, avoiding vent up and taking action to return to normal operation completely automatically. It will be. Therefore, in the vent pusher of the present invention, it is not only possible to detect a vent up and give an alarm, but also to return to normal operation unattended and fully automatically.

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

【図１】本考案のベント押出機の一実施例のベント部周
辺を示す断面図である。FIG. 1 is a cross-sectional view showing the vicinity of a vent portion of an embodiment of a vent extruder of the present invention.

【図２】従来のベント押出機のベント部周辺を示す断面
図である。FIG. 2 is a cross-sectional view showing the periphery of a vent section of a conventional vent extruder.

【符号の説明】[Explanation of symbols]

１ 押出スクリュ− ２ バレル ３ ベント孔 ４ 排気室 ５ 排気管 ６ 真空ポンプ ７ 温度センサ− ９ 温度センサ−上下動装置 DESCRIPTION OF SYMBOLS 1 Extrusion screw 2 Barrel 3 Vent hole 4 Exhaust chamber 5 Exhaust pipe 6 Vacuum pump 7 Temperature sensor-9 Temperature sensor-Vertical movement device

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 【請求項１】 バレルにベント孔が設けられ、該ベント
孔に連通する排気室が備えられ、該排気室内に温度セン
サーが上下可動に設けられていることを特徴とするベン
ト押出機。1. A vent extruder comprising a barrel having a vent hole, an exhaust chamber communicating with the vent hole, and a temperature sensor vertically movable in the exhaust chamber.
JP079692U 1991-10-01 1991-10-01 Vent extruder Pending JPH0529731U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP079692U JPH0529731U (en) 1991-10-01 1991-10-01 Vent extruder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP079692U JPH0529731U (en) 1991-10-01 1991-10-01 Vent extruder

Publications (1)

Publication Number Publication Date
JPH0529731U true JPH0529731U (en) 1993-04-20

Family

ID=13697261

Family Applications (1)

Application Number Title Priority Date Filing Date
JP079692U Pending JPH0529731U (en) 1991-10-01 1991-10-01 Vent extruder

Country Status (1)

Country Link
JP (1) JPH0529731U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101697902B1 (en) * 2016-06-09 2017-01-18 윤주세 Gas discharge device of extruder

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101697902B1 (en) * 2016-06-09 2017-01-18 윤주세 Gas discharge device of extruder

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