JP2007105944A - Rubber extruder and firing risk judging method of rubber - Google Patents

Rubber extruder and firing risk judging method of rubber Download PDF

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JP2007105944A
JP2007105944A JP2005297616A JP2005297616A JP2007105944A JP 2007105944 A JP2007105944 A JP 2007105944A JP 2005297616 A JP2005297616 A JP 2005297616A JP 2005297616 A JP2005297616 A JP 2005297616A JP 2007105944 A JP2007105944 A JP 2007105944A
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rubber
hopper
temperature
extruder
cylinder
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JP4628238B2 (en
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Masatoshi Yoshida
雅俊 吉田
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Bridgestone Corp
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Bridgestone Corp
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    • 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
    • B29C2948/92114—Dimensions
    • B29C2948/92161—Volume or quantity
    • 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
    • B29C2948/92333—Raw material handling or dosing, e.g. active hopper or feeding device
    • 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
    • B29C2948/92828—Raw material handling or dosing, e.g. active hopper or feeding device
    • 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
    • B29C2948/92866—Inlet shaft or slot, e.g. passive hopper; Injector, e.g. injector nozzle on barrel

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

Abstract

<P>PROBLEM TO BE SOLVED: To accurately judge whether there is firing risk of a rubber in a rubber extruder. <P>SOLUTION: The rubber, which is supplied to the hopper 14 of the rubber extruder 1 from a Banbury mixer 5, is supplied into a cylinder 11 and fed forward by a screw 12 to be extruded from an extrusion head 13. The extruded rubber is molded into a rubber sheet 33 having a predetermined thickness and width by the calender roller pair of a roller die device. The temperature of the rubber in the hopper 14 is detected by a non-contact temperature sensor 21. The height (upper end position) of the rubber is detected by level sensors 22-24. When the height of the rubber is not lowered and the temperature of the rubber is a predetermined dangerous level or above, a valve 7 is opened to supply water into the hopper 14 from piping 6, and the rubber in the hopper 14 is cooled. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、ゴム押出機及びその内部のゴムの発火の危険性を判定する方法に関し、詳細には、ゴムの発火の危険性の有無を確実に判定できるゴム押出機及びゴムの発火の危険性判定方法に関する。   The present invention relates to a rubber extruder and a method for determining the risk of rubber ignition inside, and more particularly, a rubber extruder capable of reliably determining the risk of rubber ignition and the risk of rubber ignition. It relates to a determination method.

タイヤ構成部材等の混練ゴムシートを製造する装置として、バンバリーミキサー等により混練されたゴムをスクリュー式のゴム押出機のホッパーを通してシリンダに供給し、シリンダの内に回転自在に支持されたスクリューの回転により前方へ移送し、ゴム押出機前端の押出ヘッドから押出し、押出されたゴムを、一対のカレンダロールを有するローラダイ装置により所定の厚み及び幅に成型するようにしたローラヘッド押出機がある（特許文献１参照）。   As a device for producing kneaded rubber sheets for tire components, etc., the rubber kneaded by a Banbury mixer etc. is supplied to the cylinder through the hopper of a screw type rubber extruder, and the rotation of the screw supported rotatably in the cylinder There is a roller head extruder in which the rubber is transferred forward, extruded from the extrusion head at the front end of the rubber extruder, and the extruded rubber is molded into a predetermined thickness and width by a roller die device having a pair of calendar rolls (patent) Reference 1).

このようなローラヘッド押出機において、ゴム押出機のトラブルなどによりスクリューが停止してしまい、ゴム押出機内（ホッパー及びシリンダ内）にゴムが滞留することがある。この場合、バンバリーミキサー等により混練されたゴムは熱入れされた状態であり、かつゴム自体の分解反応により自己発熱する可能性のあることから、滞留状態が長時間継続すると、滞留しているゴムの温度が上昇し、ホッパー及びその付近のシリンダ内で発火するおそれがある。   In such a roller head extruder, the screw may stop due to a problem with the rubber extruder or the like, and the rubber may stay in the rubber extruder (the hopper and the cylinder). In this case, the rubber kneaded by a Banbury mixer or the like is in a heated state and may self-heat due to the decomposition reaction of the rubber itself. There is a risk of fire in the hopper and the nearby cylinder.

そこで、文献に記載されたものではないが、従来は、ホッパー内に堆積されているゴムの上端の位置をレベルセンサにより検出し、その位置が規定位置より高くなると、ゴム押出機内にゴムが滞留しており、発火の危険性があると判定している。
特開平９−８５８０１号公報 Therefore, although not described in the literature, conventionally, the position of the upper end of the rubber accumulated in the hopper is detected by a level sensor, and when that position becomes higher than the specified position, the rubber stays in the rubber extruder. It has been determined that there is a risk of fire.
JP-A-9-85801

しかしながら、ホッパー内に堆積されているゴムの上端の位置に基づく判定では、環境温度やゴムの材質に相違による発火温度の相違に対応できないため、安全性の観点から規定位置を低く設定することになり、生産効率の向上を妨げている。   However, since the determination based on the position of the upper end of the rubber accumulated in the hopper cannot cope with the difference in ignition temperature due to the difference in environmental temperature or rubber material, the specified position is set low from the viewpoint of safety. This hinders the improvement of production efficiency.

本発明は、このような問題点に鑑みてなされたものであり、その目的は、ゴム押出機内のゴムの発火の危険性の有無を正確に判定することである。   This invention is made | formed in view of such a problem, The objective is to determine correctly the presence or absence of the danger of the ignition of the rubber | gum in a rubber extruder.

請求項１に係る発明は、ホッパーを通してシリンダ内に供給されたゴムを押出すゴム押出機であって、前記ホッパー内のゴムの温度を検出するゴム温度検出手段と、前記ホッパー内のゴムの上端の位置を検出するゴムレベル検出手段と、前記ゴム温度検出手段及びゴムレベル検出手段の出力に基づいて前記ホッパー及びシリンダ内のゴムの発火の危険性の有無を判定する判定手段とを備えたことを特徴とするゴム押出機である。
請求項２に係る発明は、請求項１記載のゴム押出機において、前記ゴム温度検出手段は、非接触温度センサであることを特徴とするゴム押出機である。
請求項３に係る発明は、請求項１記載のゴム押出機において、前記判定手段が発火の危険性ありと判定したとき、前記ホッパー内のゴムを冷却する冷却手段を備えたことを特徴とするゴム押出機である。
請求項４に係る発明は、請求項１記載のゴム押出機において、前記判定手段は、前記ゴムの温度が所定値以上であり、かつ該ゴムの上端の位置が低下しないときに、発火の危険性ありと判定することを特徴とするゴム押出機である。
請求項５に係る発明は、ホッパーを通してシリンダ内に供給されたゴムを押出すゴム押出機の前記ホッパー及びシリンダ内のゴムの発火の危険性を判定する方法であって、前記ホッパー内のゴムの温度を検出するゴム温度検出工程と、前記ホッパー内のゴムの上端の位置を検出するゴムレベル検出工程と、前記検出されたゴム温度及びゴム上端位置に基づいて前記ホッパー及びシリンダ内のゴムの発火の危険性の有無を判定する判定工程とを備えた特徴とするゴムの発火の危険性判定方法である。 The invention according to claim 1 is a rubber extruder for extruding rubber supplied into a cylinder through a hopper, a rubber temperature detecting means for detecting the temperature of the rubber in the hopper, and an upper end of the rubber in the hopper. A rubber level detecting means for detecting the position of the rubber, and a judging means for judging the risk of ignition of rubber in the hopper and the cylinder based on the outputs of the rubber temperature detecting means and the rubber level detecting means. Is a rubber extruder characterized by
The invention according to claim 2 is the rubber extruder according to claim 1, wherein the rubber temperature detecting means is a non-contact temperature sensor.
The invention according to claim 3 is the rubber extruder according to claim 1, further comprising a cooling means for cooling the rubber in the hopper when the determination means determines that there is a risk of ignition. It is a rubber extruder.
According to a fourth aspect of the present invention, there is provided the rubber extruder according to the first aspect, wherein the determination means is a risk of ignition when the temperature of the rubber is equal to or higher than a predetermined value and the position of the upper end of the rubber does not decrease. It is a rubber extruder characterized by having the property.
The invention according to claim 5 is a method for judging the risk of ignition of the hopper of the rubber extruder and the rubber in the cylinder for extruding the rubber supplied into the cylinder through the hopper, and the rubber in the hopper Rubber temperature detecting step for detecting temperature; rubber level detecting step for detecting the position of the upper end of rubber in the hopper; and ignition of rubber in the hopper and cylinder based on the detected rubber temperature and rubber upper end position. A method for determining the risk of rubber ignition, comprising a determination step for determining whether or not there is any danger.

（作用）
請求項１、５に係る発明によれば、ホッパー内のゴムの温度及びゴムの上端の位置を、それぞれゴム温度検出手段及びゴムレベル検出手段により検出し、それらの検出データに基づいて、ホッパー及びシリンダ内のゴムの発火の危険性の有無を判定する。
請求項２に係る発明によれば、ホッパー内のゴムの温度及びゴムの上端の位置を、それぞれ非接触温度センサ及びゴムレベル検出手段により検出し、それらの検出データに基づいて、ホッパー及びシリンダ内のゴムの発火の危険性の有無を判定する
請求項３に係る発明によれば、ホッパー及びシリンダ内のゴムに発火の危険性ありと判定されたとき、ホッパー内のゴムを冷却する。
請求項４に係る発明によれば、ゴム温度検出手段で検出したゴムの温度が所定値以上であり、かつゴムレベル検出手段で検出したゴムの上端の位置が低下しないときに、発火の危険性ありと判定する。 (Function)
According to the first and fifth aspects of the present invention, the temperature of the rubber in the hopper and the position of the upper end of the rubber are detected by the rubber temperature detecting means and the rubber level detecting means, respectively, and based on the detected data, the hopper and Determine if there is a risk of ignition of rubber in the cylinder.
According to the second aspect of the present invention, the temperature of the rubber in the hopper and the position of the upper end of the rubber are detected by the non-contact temperature sensor and the rubber level detecting means, respectively, and based on the detected data, The rubber in the hopper is cooled when it is determined that there is a risk of ignition in the rubber in the hopper and the cylinder.
According to the invention of claim 4, there is a risk of ignition when the temperature of the rubber detected by the rubber temperature detecting means is not less than a predetermined value and the position of the upper end of the rubber detected by the rubber level detecting means does not decrease. Judge that there is.

本発明によれば、ホッパー内のゴムの温度及びゴムの上端の位置を用いることで、ホッパー及びシリンダ内のゴムの発火の危険性の有無を正確に判定できる。   According to the present invention, by using the temperature of the rubber in the hopper and the position of the upper end of the rubber, it is possible to accurately determine whether there is a risk of ignition of the rubber in the hopper and the cylinder.

以下、本発明の実施形態について図面を参照して説明する。
図１は本発明の実施形態に係るゴムシート製造装置の構成を示す図である。このゴムシート製造装置は、ゴム押出機１と、ゴム押出機１の前方に配置されたローラダイ装置２と、制御装置３と、ゴムシート押出機１の上側に配置されたバンバリーミキサー５とを備えている。 Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a diagram showing a configuration of a rubber sheet manufacturing apparatus according to an embodiment of the present invention. The rubber sheet manufacturing apparatus includes a rubber extruder 1, a roller die device 2 disposed in front of the rubber extruder 1, a control device 3, and a Banbury mixer 5 disposed on the upper side of the rubber sheet extruder 1. ing.

ゴム押出機１は、シリンダ１１と、シリンダ１１の内部に回転自在に支持されたスクリュー１２と、シリンダ１１の先端に取り付けられた押出しヘッド１３と、シリンダ１１の後部の上側に設けられたホッパー１４と、スクリュー１２を回転させるモータ等の回転駆動装置１５とを備えている。   The rubber extruder 1 includes a cylinder 11, a screw 12 rotatably supported inside the cylinder 11, an extrusion head 13 attached to the tip of the cylinder 11, and a hopper 14 provided above the rear portion of the cylinder 11. And a rotation drive device 15 such as a motor for rotating the screw 12.

ローラダイ装置２は、互いの外周面が対向するように配置された一対のカレンダロールを備えており、図示しない回転駆動装置により、図示の矢印方向に回転可能に構成されると共に、ロール間のギャップの調整が可能に構成されている。   The roller die device 2 includes a pair of calender rolls arranged so that their outer peripheral surfaces face each other, and is configured to be rotatable in the direction of the arrow shown in the figure by a rotary drive unit (not shown), and a gap between the rolls. It is configured to be adjustable.

ホッパー１４の上端にはバンバリーミキサー５が接続されており、ホッパー１４の側面には、ホッパー１４内にゴム冷却用の水を供給するための配管６が接続されており、配管６には配管６内の水の流れを調整するための弁７が設けられている。弁７の開閉状態は制御装置３により設定される。   A banbury mixer 5 is connected to the upper end of the hopper 14, and a pipe 6 for supplying rubber cooling water into the hopper 14 is connected to the side surface of the hopper 14. A valve 7 is provided for adjusting the flow of water inside. The open / close state of the valve 7 is set by the control device 3.

ホッパー１４の上部には、バンバリーミキサー５からホッパー１４内に供給され、ホッパー１４内に堆積しているゴムの温度を検出するための例えば赤外線センサからなる非接触温度センサ２１が設けられている。また、ホッパー１４の内面の上下方向の異なる３箇所には、ホッパー１４内に存在するゴムの上端の位置（以下、高さと言う）を３段階（高、中、低）で検出するためのレベルセンサ２２乃至２４が設けられている。ここで、レベルセンサ２２乃至２４の各々は、例えば互いに対向する発光素子と受光素子とからなり、発光素子から受光素子への光線がゴムにより遮られる否かにより、ホッパー１４内に堆積しているゴムの高さを３段階（高、中、低）で判別できる。非接触温度センサ２１及びレベルセンサ２２乃至２４は、監視装置９の制御により動作し、監視装置９は制御装置３の制御により動作して、各センサの出力信号を所定のタイミングで制御装置３へ供給する。   A non-contact temperature sensor 21 including an infrared sensor for detecting the temperature of the rubber supplied from the Banbury mixer 5 into the hopper 14 and accumulated in the hopper 14 is provided on the hopper 14. Further, there are three levels on the inner surface of the hopper 14 which are different in the vertical direction and are used to detect the position of the upper end of rubber existing in the hopper 14 (hereinafter referred to as height) in three stages (high, medium and low). Sensors 22 to 24 are provided. Here, each of the level sensors 22 to 24 includes, for example, a light emitting element and a light receiving element that face each other, and is deposited in the hopper 14 depending on whether or not light rays from the light emitting element to the light receiving element are blocked by rubber. The height of the rubber can be determined in three levels (high, medium and low). The non-contact temperature sensor 21 and the level sensors 22 to 24 are operated by the control of the monitoring device 9, and the monitoring device 9 is operated by the control of the control device 3, and the output signal of each sensor is sent to the control device 3 at a predetermined timing. Supply.

制御装置３は、コンピュータにより構成されており、回転駆動装置１５を所定の回転速度で回転させることにより、スクリュー１２を回転させる。また、ローラダイ装置２のカレンダロール対を回転させる回転駆動装置を所定の回転速度で回転させる。さらに、監視装置９から出力される各センサの出力信号に基づいて、ホッパー１４及びシリンダ１１内のゴムに発火の危険性があると判定したとき、弁７を開いて、水が配管９を通ってホッパー１４内に供給されるように制御することで、ホッパー１４内に堆積しているゴムを冷却し、発火を未然に防止する。   The control device 3 is configured by a computer, and rotates the screw 12 by rotating the rotation drive device 15 at a predetermined rotation speed. Further, the rotary drive device that rotates the calendar roll pair of the roller die device 2 is rotated at a predetermined rotational speed. Further, when it is determined that there is a risk of ignition in the rubber in the hopper 14 and the cylinder 11 based on the output signal of each sensor output from the monitoring device 9, the valve 7 is opened and water passes through the pipe 9. By controlling to be supplied into the hopper 14, the rubber accumulated in the hopper 14 is cooled to prevent ignition.

以上のように構成されたゴムシート製造装置の動作を説明する。バンバリーミキサー５からホッパー１４内に供給されたゴムは、シリンダ１１内の後部に到達し、回転駆動装置１５の駆動により回転しているスクリュー１２により前方に搬送され、押出しヘッド１３の前端から押出される。押出されたゴムは、押出しヘッド１３の前方に配置されたローラダイ装置２のカレンダロール対の後方側（押出しヘッド１３と対向する側）にて加圧状態のバンク３２を形成し、このバンク３２を、ローラダイ装置２のカレンダロール対により所定の厚み及び幅のゴムシート３３に成型する。   The operation of the rubber sheet manufacturing apparatus configured as described above will be described. The rubber supplied from the Banbury mixer 5 into the hopper 14 reaches the rear part in the cylinder 11, is conveyed forward by the screw 12 rotating by the drive of the rotation driving device 15, and is extruded from the front end of the extrusion head 13. The The extruded rubber forms a pressurized bank 32 on the rear side (the side facing the extrusion head 13) of the calender roll pair of the roller die device 2 disposed in front of the extrusion head 13, and this bank 32 is Then, it is molded into a rubber sheet 33 having a predetermined thickness and width by the calender roll pair of the roller die device 2.

さらに、本実施形態に係るゴム押出機では、図２に示す手順により、ホッパー１４からシリンダ１１内に供給されたゴムの滞留に起因する温度上昇からゴムが発火することを未然に防止している。なお、この図に示す手順は、正常に終了している間は周期的に実行される。   Furthermore, in the rubber extruder according to this embodiment, the procedure shown in FIG. 2 prevents the rubber from being ignited from the temperature rise caused by the retention of the rubber supplied from the hopper 14 into the cylinder 11. . It should be noted that the procedure shown in this figure is periodically executed while it is normally completed.

制御装置５は、ホッパー１４に設けられた非接触温度センサ２１及びレベルセンサ２２乃至２４の出力データを読込む（ステップＳ１）。次いで、読込んだレベルセンサ２２乃至２４の出力データに基づいて、ホッパー１４内に堆積しているゴムの高さが低下しているか否かを判定する（ステップＳ２）。ここで、低下しているか否かの判定は、例えば前回の読込み時に検知ありのデータを出力していたレベルセンサが検知なしのデータを出力するようになった場合に低下しているものと判定する。そして、高さが低下していると判定した場合は（ステップＳ２でYES ）、ホッパー１４に供給されたゴムが滞留することなく、シリンダ１１から押出されているので、正常に終了する。   The control device 5 reads the output data of the non-contact temperature sensor 21 and the level sensors 22 to 24 provided in the hopper 14 (step S1). Next, based on the read output data of the level sensors 22 to 24, it is determined whether or not the height of the rubber accumulated in the hopper 14 is reduced (step S2). Here, the determination of whether or not there is a decrease is, for example, determined that the level sensor that output data with detection at the previous reading starts to output data without detection To do. If it is determined that the height has decreased (YES in step S2), the rubber supplied to the hopper 14 is pushed out from the cylinder 11 without staying, and thus the processing ends normally.

一方、ホッパー１４内に堆積しているゴムの高さが低下していない場合（ステップＳ２でNO）は、ステップＳ１で読込んだ非接触温度センサ２１のデータから、ホッパー１４内に堆積しているゴムの温度が所定の危険温度以上であるか否かを判定する（ステップＳ３）。そして、危険温度以上の場合は（ステップＳ３でYES ）、弁７を開き、配管６を通してホッパー１４内に水を供給する（ステップＳ４）。これにより、水がホッパー１４内に供給されるので、ホッパー１４内に堆積しているゴム及びシリンダ１１内のホッパー１４付近に滞留しているゴムが冷却されることで、それらの温度が低下し、発火が防止される。その後、回転駆動装置１５を制御し、スクリュー１２を強制的に回転させることで、ゴムを押出しヘッド１２から強制的に押出し、ローラダイ装置２により成型せずに、再びバンバリーミキサー５に投入する。   On the other hand, when the height of the rubber accumulated in the hopper 14 is not lowered (NO in step S2), the rubber accumulated in the hopper 14 is obtained from the data of the non-contact temperature sensor 21 read in step S1. It is determined whether or not the temperature of the rubber being used is equal to or higher than a predetermined dangerous temperature (step S3). If the temperature is higher than the critical temperature (YES in step S3), the valve 7 is opened and water is supplied into the hopper 14 through the pipe 6 (step S4). Thereby, since water is supplied into the hopper 14, the rubber accumulated in the hopper 14 and the rubber staying in the vicinity of the hopper 14 in the cylinder 11 are cooled, so that their temperatures are lowered. Fire is prevented. Thereafter, the rotation drive device 15 is controlled to forcibly rotate the screw 12, so that the rubber is forcibly extruded from the extrusion head 12, and the rubber die device 2 does not mold the rubber, but again puts it into the Banbury mixer 5.

ホッパー１４内に堆積しているゴムの温度が所定の危険温度未満の場合は（ステップＳ３でNO）、タイマをスタートさせ（ステップＳ５）、一定時間経過してタイムアップした時に（ステップＳ６でYES ）、非接触温度センサ２１及びレベルセンサ２２乃至２４の出力データを読込み（ステップＳ７）、ホッパー１４内に堆積しているゴムの高さが低下しているか否かを判定する（ステップＳ８）。そして、高さが低下していると判定した場合は（ステップＳ８でYES ）、ホッパー１４に供給されたゴムが滞留することなく、シリンダ１１から押出されているので、正常に終了する。   If the temperature of the rubber accumulated in the hopper 14 is lower than the predetermined dangerous temperature (NO in step S3), the timer is started (step S5), and when the time is up after a certain time (YES in step S6) ), The output data of the non-contact temperature sensor 21 and the level sensors 22 to 24 are read (step S7), and it is determined whether or not the height of the rubber accumulated in the hopper 14 is lowered (step S8). If it is determined that the height has decreased (YES in step S8), the rubber supplied to the hopper 14 is pushed out from the cylinder 11 without staying, and thus the processing ends normally.

一方、ホッパー１４内に堆積しているゴムの高さが低下していない場合（ステップＳ８でNO）は、ステップＳ７で読込んだ非接触温度センサ２１のデータから、ホッパー１４内に堆積しているゴムの温度が所定の危険温度以上であるか否かを判定する（ステップＳ９）。そして、危険温度以上の場合は（ステップＳ９でYES ）、弁７を開き、配管６を通してホッパー１４内に水を供給する（ステップＳ４）。   On the other hand, when the height of the rubber accumulated in the hopper 14 is not lowered (NO in step S8), the rubber accumulated in the hopper 14 is obtained from the data of the non-contact temperature sensor 21 read in step S7. It is determined whether or not the temperature of the rubber is higher than a predetermined dangerous temperature (step S9). If the temperature is higher than the dangerous temperature (YES in step S9), the valve 7 is opened and water is supplied into the hopper 14 through the pipe 6 (step S4).

また、ホッパー１４内に堆積しているゴムの温度が所定の危険温度未満の場合は（ステップＳ９でNO）、回転駆動装置１５によりスクリュー１２を強制的に回転させることで、シリンダ１１内のゴムを押出ヘッド１３から押出す（ステップＳ１０）。押出されたゴムはローラダイ装置２により成型せず、再びバンバリーミキサー５に投入する。   Further, when the temperature of the rubber accumulated in the hopper 14 is lower than the predetermined dangerous temperature (NO in step S9), the rubber in the cylinder 11 is forcibly rotated by the rotation drive device 15 to rotate the screw 12. Is extruded from the extrusion head 13 (step S10). The extruded rubber is not molded by the roller die device 2 and is put into the Banbury mixer 5 again.

このように、本発明の実施形態によれば、ホッパー１４内のゴムの高さが低下せず、かつゴムの温度が危険温度以上に達しているときに、ゴム押出機１内にゴムが滞留しており、発火の危険性があると判定するので、正確な判定が可能である。また、発火の危険性ありと判定したときに、ホッパー１４内に水を供給し、ゴムを冷却することにより、発火を未然に防止できる。   As described above, according to the embodiment of the present invention, the rubber stays in the rubber extruder 1 when the height of the rubber in the hopper 14 is not lowered and the temperature of the rubber reaches the dangerous temperature or more. Since it is determined that there is a risk of fire, accurate determination is possible. Further, when it is determined that there is a risk of ignition, it is possible to prevent ignition by supplying water into the hopper 14 and cooling the rubber.

本発明の実施形態に係るゴムシート製造装置の構成を示す図である。It is a figure which shows the structure of the rubber sheet manufacturing apparatus which concerns on embodiment of this invention. 本発明の実施形態に係るゴム押出機がゴムの発火を防止する手順を示すフローチャートである。It is a flowchart which shows the procedure in which the rubber extruder which concerns on embodiment of this invention prevents ignition of rubber.

符号の説明Explanation of symbols

１・・・ゴム押出機、３・・・制御装置、６・・・配管、７・・・弁、１１・・・シリンダ、１４・・・ホッパー、２１・・・非接触温度センサ、２２，２３，２４・・・レベルセンサ。   DESCRIPTION OF SYMBOLS 1 ... Rubber extruder, 3 ... Control apparatus, 6 ... Piping, 7 ... Valve, 11 ... Cylinder, 14 ... Hopper, 21 ... Non-contact temperature sensor, 22, 23, 24 ... Level sensors.

Claims (5)

ホッパーを通してシリンダ内に供給されたゴムを押出すゴム押出機であって、
前記ホッパー内のゴムの温度を検出するゴム温度検出手段と、前記ホッパー内のゴムの上端の位置を検出するゴムレベル検出手段と、前記ゴム温度検出手段及びゴムレベル検出手段の出力に基づいて前記ホッパー及びシリンダ内のゴムの発火の危険性の有無を判定する判定手段とを備えたことを特徴とするゴム押出機。 A rubber extruder for extruding rubber supplied into a cylinder through a hopper,
Based on the output of the rubber temperature detecting means for detecting the temperature of the rubber in the hopper, the rubber level detecting means for detecting the position of the upper end of the rubber in the hopper, and the output of the rubber temperature detecting means and the rubber level detecting means A rubber extruder comprising: a hopper and a judging means for judging whether or not there is a risk of ignition of rubber in the cylinder. 請求項１記載のゴム押出機において、
前記ゴム温度検出手段は、非接触温度センサであることを特徴とするゴム押出機。 The rubber extruder according to claim 1, wherein
The rubber extruder is characterized in that the rubber temperature detecting means is a non-contact temperature sensor. 請求項１記載のゴム押出機において、
前記判定手段が発火の危険性ありと判定したとき、前記ホッパー内のゴムを冷却する冷却手段を備えたことを特徴とするゴム押出機。 The rubber extruder according to claim 1, wherein
A rubber extruder comprising cooling means for cooling the rubber in the hopper when the judging means judges that there is a risk of ignition. 請求項１記載のゴム押出機において、
前記判定手段は、前記ゴムの温度が所定値以上であり、かつ該ゴムの上端の位置が低下しないときに、発火の危険性ありと判定することを特徴とするゴム押出機。 The rubber extruder according to claim 1, wherein
The rubber extruder according to claim 1, wherein the determining means determines that there is a risk of ignition when the temperature of the rubber is equal to or higher than a predetermined value and the position of the upper end of the rubber does not decrease. ホッパーを通してシリンダ内に供給されたゴムを押出すゴム押出機の前記ホッパー及びシリンダ内のゴムの発火の危険性を判定する方法であって、
前記ホッパー内のゴムの温度を検出するゴム温度検出工程と、前記ホッパー内のゴムの上端の位置を検出するゴムレベル検出工程と、前記検出されたゴム温度及び上端の位置に基づいて前記ホッパー及びシリンダ内のゴムの発火の危険性の有無を判定する判定工程とを備えた特徴とするゴムの発火の危険性判定方法。
A method of determining the risk of ignition of the rubber in the hopper and cylinder of a rubber extruder for extruding rubber supplied into the cylinder through a hopper,
A rubber temperature detecting step for detecting the temperature of the rubber in the hopper, a rubber level detecting step for detecting the position of the upper end of the rubber in the hopper, and the hopper and the hopper based on the detected rubber temperature and the position of the upper end. And a determination step for determining whether there is a risk of ignition of the rubber in the cylinder.
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CN104354288A (en) * 2014-10-16 2015-02-18 马弗橡胶（镇江）有限公司 Rubber screw extruder

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CN105438849A (en) * 2015-10-29 2016-03-30 成都易态科技有限公司 Dust discharging process and dust discharging structure used for yellow phosphorus gas purifying

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JPS4894777A (en) * 1972-03-21 1973-12-06
JPH06320532A (en) * 1993-05-12 1994-11-22 Idemitsu Petrochem Co Ltd Kneading and granulating method of resin

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Publication number Priority date Publication date Assignee Title
JPS4894777A (en) * 1972-03-21 1973-12-06
JPH06320532A (en) * 1993-05-12 1994-11-22 Idemitsu Petrochem Co Ltd Kneading and granulating method of resin

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104354288A (en) * 2014-10-16 2015-02-18 马弗橡胶（镇江）有限公司 Rubber screw extruder

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