JP4424543B2 - Temperature control device for rubber-coated head - Google Patents

Temperature control device for rubber-coated head Download PDF

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JP4424543B2
JP4424543B2 JP2004209123A JP2004209123A JP4424543B2 JP 4424543 B2 JP4424543 B2 JP 4424543B2 JP 2004209123 A JP2004209123 A JP 2004209123A JP 2004209123 A JP2004209123 A JP 2004209123A JP 4424543 B2 JP4424543 B2 JP 4424543B2
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rubber
temperature
coated head
control device
heat
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JP2006027068A (en
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祐三 黒木
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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
    • B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
    • B29C48/86—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the nozzle zone
    • B29C48/872—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the nozzle zone characterised by differential heating or cooling
    • 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
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/07—Flat, e.g. panels
    • 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
    • B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
    • B29C48/154—Coating solid articles, i.e. non-hollow articles
    • 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
    • B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
    • B29C48/156—Coating two or more articles simultaneously
    • 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
    • B29C48/285—Feeding the extrusion material to the extruder
    • B29C48/288—Feeding the extrusion material to the extruder in solid form, e.g. powder or granules
    • B29C48/2883—Feeding the extrusion material to the extruder in solid form, e.g. powder or granules of preformed parts, e.g. inserts fed and transported generally uninfluenced through the extruder or inserts fed directly to the die
    • 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
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
    • B29C48/34—Cross-head annular extrusion nozzles, i.e. for simultaneously receiving moulding material and the preform to be coated
    • 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
    • B29C2948/92409—Die; Nozzle zone
    • 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
    • B29C2948/92904—Die; Nozzle zone
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2021/00—Use of unspecified rubbers as moulding material
    • B29K2021/006—Thermosetting elastomers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2705/00—Use of metals, their alloys or their compounds, for preformed parts, e.g. for inserts

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Description

本発明は、引き揃えられた複数本のコードの両面にゴムを被覆して押し出すことでタイヤのベルト、カーカス、補強層等のようなプライを形成する押出機に関し、特にインシュレーション方式のゴム被覆ヘッドから送出されるゴムの温度上昇を抑制するための温度制御装置に関する。   The present invention relates to an extruder for forming a ply such as a tire belt, a carcass, a reinforcing layer, etc. by covering and extruding rubber on both surfaces of a plurality of aligned cords, and particularly an insulation type rubber coating. The present invention relates to a temperature control device for suppressing temperature rise of rubber delivered from a head.

例えばタイヤのベルトは、引き揃えられた複数本のベルト層コードの両面に薄いゴム層を被覆してサンドイッチ状にすることで形成される。従来、このような引き揃えられた複数本のコードに対してゴムを被覆する装置として、それらのコードを押出機のゴム被覆ヘッド（インシュレーションヘッド）内のコード通路を通過させているときに、コード通路の両側、例えば上下から合流するゴム流路にゴムを供給してコードの両面にゴムを被覆し、その後、ゴム被覆ヘッド前端の上下に配置された一対のダイの間に形成される通路の寸法によってコードの両面に被覆されたゴムの厚みを決定するように構成した、インシュレーション方式の押出機がある（特許文献１参照）。   For example, a tire belt is formed by sandwiching a thin rubber layer on both sides of a plurality of belt layer cords that are aligned. Conventionally, as a device for coating rubber on a plurality of such arranged cords, when these cords are passed through a cord passage in a rubber coating head (insulation head) of an extruder, A path formed between a pair of dies disposed on the upper and lower sides of the front end of the rubber-coated head by supplying rubber to both sides of the code path, for example, rubber paths that merge from above and below to coat the rubber on both sides of the cord. There is an insulation type extruder configured to determine the thickness of the rubber coated on both sides of the cord according to the dimensions (see Patent Document 1).

図６はインシュレーション方式による従来の押出機の斜視図であり、図７は図６におけるゴム被覆ヘッド４のＡ−Ａ断面図である。なお、図６及び７において、複数本のコード５が移送される方向を前方とする。   FIG. 6 is a perspective view of a conventional extruder using an insulation system, and FIG. 7 is a cross-sectional view taken along line AA of the rubber-coated head 4 in FIG. 6 and 7, the direction in which the plurality of cords 5 are transferred is defined as the front.

図６に示すように、押出機は、上面に設けられたホッパ２から投入されたゴム材料を攪拌してゴムを生成するゴム生成部１と、ゴム生成部１の側面に連結され、かつスクリューを内蔵し、ゴム生成部１から送出されたゴムを混練・加熱しながら前方へ移送するシリンダ３と、シリンダ３の先端に連結され、かつ図示されていない移送手段により張力を付与されて移送される複数本のコード５を所定の相対配列、例えば平行に保持して導入するとともに、その上下両面にシリンダ３から移送されてきたゴムを被覆して形成したプライ６を外部へ送出するゴム被覆ヘッド４とを備えている。   As shown in FIG. 6, the extruder is connected to the rubber generating unit 1 that generates rubber by stirring the rubber material introduced from the hopper 2 provided on the upper surface, the side of the rubber generating unit 1, and the screw And a cylinder 3 for transferring the rubber delivered from the rubber generator 1 forward while being kneaded and heated, and connected to the tip of the cylinder 3 and transferred with tension applied by a transfer means (not shown). A plurality of cords 5 are introduced in a predetermined relative arrangement, for example, held in parallel, and the ply 6 formed by covering the rubber transferred from the cylinder 3 on both upper and lower surfaces thereof is sent to the outside. 4 is provided.

図７に示すように、ゴム被覆ヘッド４は、Ａ−Ａ断面が上下対称に構成されており、インサータ１１と、インサータ１１を上下から保持するインサータホルダ１２とを備えている。インサータ１１は、それらの上下方向の間を前後に貫通する孔からなるコード通路１３を備えており、後方から供給される複数本のコード５を所定の相対配列に保持して通過させることができる。インサータホルダ１２の前方には、上下対称なダイ１４ａ，１４ｂが、インサータホルダ１２の前面に対して間隔を空けて配置されている。   As shown in FIG. 7, the rubber-coated head 4 is configured so that the AA cross section is vertically symmetrical, and includes an inserter 11 and an inserter holder 12 that holds the inserter 11 from above and below. The inserter 11 is provided with a cord passage 13 formed of a hole penetrating back and forth between the vertical directions thereof, and can pass a plurality of cords 5 supplied from the rear while maintaining a predetermined relative arrangement. . In front of the inserter holder 12, vertically symmetrical dies 14 a and 14 b are arranged with a space from the front surface of the inserter holder 12.

インサータホルダ１２の前面には、上下の端からそれぞれ前下方及び前上方にテーパ状の傾斜面が延設されており、上側ダイ１４ａの後部上端から前下方に延設された傾斜面及び下側ダイ１４ｂの後部下端から前上方に延設された傾斜面との間で、先端先細りの上下対称なゴム流路１５ａ，１５ｂを形成している。また、上側ダイ１４ａの傾斜面の下端の前方に延設された下向きの水平面と、下側ダイ１４ｂの傾斜面の上端の前方に延設された上向きの水平面との間に形成される偏平な通路１７の高さにより、プライ６の上下の厚みを決定するように構成されている。   On the front surface of the inserter holder 12, tapered inclined surfaces are extended from the upper and lower ends to the front lower side and the front upper side, respectively, and the inclined surface and the lower side extended from the upper end of the upper die 14a to the front lower side. Between the lower end of the rear portion of the die 14b and an inclined surface extending forward and upward, rubber channels 15a and 15b that are vertically symmetrical with a tapered tip are formed. Further, a flat surface formed between a downward horizontal plane extending in front of the lower end of the inclined surface of the upper die 14a and an upward horizontal plane extending in front of the upper end of the inclined surface of the lower die 14b. The upper and lower thicknesses of the ply 6 are determined by the height of the passage 17.

以上のように構成された押出機において、ゴム生成部１からシリンダ３へ供給されたゴムは、シリンダ３のスクリューの作用下で混練・溶融されながらシリンダ３の先端へ移送され、ゴム被覆ヘッド４に供給されて、紙面の裏面側からゴム流路１５ａ，１５ｂに注入される。一方、図示されていないコード移送手段により張力を付与されて移送されている複数本のコード５は、ゴム被覆ヘッド４の後端からインサータ１１のコード通路１３に導入され、所定の相対配列に保持されて、インサータ１１の前端からコード通路１３の延長線とゴム流路１５ａ，１５ｂとの交差部１６に移送され、上下両面にゴムが被覆される。ゴムで被覆された複数本のコード（プライ）６は、上下のダイ１４ａ，１４ｂの間の通路１７を通過するときに上下の厚みが決定され、上下のダイ１４ａ，１４ｂの前端から前方へ送出される。   In the extruder configured as described above, the rubber supplied from the rubber generating unit 1 to the cylinder 3 is transferred to the tip of the cylinder 3 while being kneaded and melted under the action of the screw of the cylinder 3, and the rubber-coated head 4. And injected into the rubber flow paths 15a and 15b from the back side of the paper surface. On the other hand, a plurality of cords 5 which are transferred with tension applied by a cord transfer means (not shown) are introduced from the rear end of the rubber-coated head 4 into the cord passage 13 of the inserter 11 and held in a predetermined relative arrangement. Then, it is transferred from the front end of the inserter 11 to the intersection 16 between the extension line of the cord passage 13 and the rubber flow paths 15a and 15b, and the upper and lower surfaces are covered with rubber. The plurality of cords (plies) 6 covered with rubber have their upper and lower thicknesses determined when passing through the passage 17 between the upper and lower dies 14a and 14b, and are sent forward from the front ends of the upper and lower dies 14a and 14b. Is done.

ところで、このゴム被覆ヘッド４により形成されるプライ６の品質を均一にするためには、ゴム流路１５ａ，１５ｂにおけるゴムの温度及び通路１７におけるプライ６の表面のゴムの温度を安定にすることが重要である。そこで、従来は、ポンプと、そのポンプとゴム被覆ヘッドの周囲との間を水が循環するように形成した配管系と、その配管系に設けた温度センサ及びヒータと、その温度センサの温度検知値が一定になるように前記ヒータを制御する制御手段とにより、ゴム被覆ヘッドの周囲に温度が一定に制御された温水を供給している（特許文献２）。   By the way, in order to make the quality of the ply 6 formed by the rubber-coated head 4 uniform, the temperature of the rubber in the rubber flow paths 15a and 15b and the temperature of the rubber on the surface of the ply 6 in the passage 17 are stabilized. is important. Therefore, conventionally, a pump, a piping system formed such that water circulates between the pump and the periphery of the rubber-coated head, a temperature sensor and a heater provided in the piping system, and temperature detection of the temperature sensor Hot water whose temperature is controlled to be constant is supplied around the rubber-coated head by the control means for controlling the heater so that the value becomes constant (Patent Document 2).

特開２００２−１１３７９３号公報JP 2002-113793 A 特開平９−１５５９５４号公報Japanese Patent Laid-Open No. 9-155554

前述したゴム被覆ヘッドにおいて、単位時間あたりのゴム被覆・押出量を多くするために、コード５の移送速度及びシリンダ３から送出するゴムの送出速度を加速すると、ゴム流路１５ａ，１５ｂを流れるゴムと、そのゴム流路１５ａ，１５ｂを形成しているインサータホルダ１２の前面及びダイ１４ａ，１４ｂの後面との間の摩擦熱、及び上下のダイ１４ａ，１４ｂ間の通路１７を通るプライ６の上下両面のゴムと、通路１７を形成しているダイ１４ａの下面及びダイ１４の上面との間の摩擦熱が大きくなるため、ゴム流路１５ａ，１５ｂを流れるゴムの温度及び通路１７を通るプライ６の表面のゴムの温度が急激に上昇する。このようにゴムの温度が上昇すると、その温度上昇はインサータホルダ１２及びダイ１４ａ，１４ｂを介して温水に伝わり、温水の温度が上昇するので、ヒータの発熱量を下げて温水の温度が一定値に低下するように制御される。   In the rubber-coated head described above, when the transfer speed of the cord 5 and the delivery speed of the rubber sent from the cylinder 3 are accelerated in order to increase the rubber coating / extrusion amount per unit time, the rubber flowing through the rubber flow paths 15a and 15b Friction heat between the front surface of the inserter holder 12 forming the rubber flow paths 15a and 15b and the rear surfaces of the dies 14a and 14b, and the upper and lower sides of the ply 6 passing through the passage 17 between the upper and lower dies 14a and 14b. Since the frictional heat between the rubber on both sides and the lower surface of the die 14 a forming the passage 17 and the upper surface of the die 14 increases, the temperature of the rubber flowing through the rubber flow paths 15 a and 15 b and the ply 6 passing through the passage 17. The temperature of the rubber on the surface rises rapidly. When the temperature of the rubber rises in this way, the temperature rise is transmitted to the hot water via the inserter holder 12 and the dies 14a and 14b, and the temperature of the hot water rises. It is controlled so as to decrease.

しかしながら、ゴムの温度上昇が温水迄伝達され、温水の温度が一定値に低下するように制御され、その一定温度の温水によりゴムの温度が安定するまでには時間がかかるため、その前にプライ６の表面のゴムからブルーム（ゴム表面への薬品類の滲み出し）が発生してしまう。また、シリンダ３が送出するゴムの特性又はゴム被覆ヘッド４が設置されている環境の温度が高い場合には、ゴム流路１５ａ，１５ｂを流れるゴム及び通路１７を通るプライ６の表面の温度が更に上昇し、ゴムに焦げが発生してしまう。   However, it is controlled so that the temperature rise of the rubber is transmitted to the hot water and the temperature of the hot water is lowered to a constant value. Bloom on the surface of the rubber 6 (exudation of chemicals on the rubber surface) occurs. Further, when the temperature of the rubber sent out by the cylinder 3 or the temperature of the environment in which the rubber-coated head 4 is installed is high, the temperature of the rubber flowing through the rubber flow paths 15a and 15b and the surface temperature of the ply 6 passing through the path 17 are high. Furthermore, it rises and the rubber is burnt.

本発明は、このような問題を解決するためになされたものであり、その目的は、引き揃えられて移送されている複数本のコードにゴムを被覆して押し出すインシュレーション方式のゴム被覆ヘッドにおいて、移送速度を上昇させたときのゴムの温度上昇を速やかに抑えることである。   The present invention has been made to solve such a problem, and an object of the present invention is to provide an insulation-type rubber-coated head that coats and extrudes a plurality of cords that are arranged and transported. It is to quickly suppress the temperature rise of the rubber when the transfer speed is increased.

請求項１に係る発明は、移送速度が切替え可能に移送されているコードにゴムを被覆してプライを形成するインシュレーション方式のゴム被覆ヘッドに対する加熱量を制御することでその温度を制御する温度制御装置であって、前記ゴム被覆ヘッドに取り付けられた熱交換手段と、前記熱交換手段と熱的に接続される発熱手段と、前記移送速度に応じて前記移送速度が高い程前記ゴム被覆ヘッドの温度を低く設定する温度設定手段と、前記温度設定手段の設定温度に応じて前記発熱手段の発熱量を制御する発熱制御手段とを備えたことを特徴とするゴム被覆ヘッドである。ここで、プライとはベルト、カーカス、補強層等を意味する。
請求項２に係る発明は、請求項１記載のゴム被覆ヘッドの温度制御装置において、前記プライの表面の温度を検知する温度検知手段を備え、前記発熱制御手段は、前記温度検知手段で検知された温度が前記設定温度となるように前記発熱量を制御することを特徴とするゴム被覆ヘッドの温度制御装置である。
請求項３に係る発明は、請求項２記載のゴム被覆ヘッドの温度制御装置において、前記温度検知手段を前記ゴム被覆ヘッドにおけるプライの出口付近に設けたことを特徴とするゴム被覆ヘッドの温度制御装置である。
請求項４に係る発明は、請求項１記載のゴム被覆ヘッドの温度制御装置において、前記熱交換手段と前記発熱手段とは、それらの間に配置された配管及び該配管内を流れる液体により熱的に接続されることを特徴とする温度制御装置である。 According to the first aspect of the present invention, the temperature is controlled by controlling the amount of heat applied to the insulation-type rubber-coated head in which the ply is formed by covering the cord which is transferred so that the transfer speed can be switched. A heat exchange means attached to the rubber covered head; a heat generating means thermally connected to the heat exchange means; and the higher the transfer speed according to the transfer speed, the higher the rubber covered head. And a heat generation control means for controlling a heat generation amount of the heat generation means in accordance with a set temperature of the temperature setting means. Here, the ply means a belt, a carcass, a reinforcing layer, or the like.
According to a second aspect of the present invention, in the temperature control device for the rubber-coated head according to the first aspect, the temperature detection device includes a temperature detection unit that detects the temperature of the surface of the ply, and the heat generation control unit is detected by the temperature detection unit. A temperature control device for a rubber-coated head, wherein the heat generation amount is controlled so that the set temperature becomes the set temperature.
According to a third aspect of the present invention, in the temperature control device for a rubber-coated head according to the second aspect, the temperature detecting means is provided in the vicinity of the outlet of the ply in the rubber-coated head. Device.
According to a fourth aspect of the present invention, in the temperature control device for a rubber-coated head according to the first aspect, the heat exchanging means and the heat generating means are heated by a pipe disposed therebetween and a liquid flowing in the pipe. It is the temperature control device characterized by being connected.

請求項１に係る発明によれば、コードに移送速度が高い程ゴム被覆ヘッドの設定温度を低くし、ゴム被覆ヘッドの加熱量を低下させる。
請求項２に係る発明によれば、プライの表面の温度を検知し、その検知温度がゴム被覆ヘッドの設定温度となるように発熱手段の発熱量を制御する。
請求項３に係る発明によれば、ゴム被覆ヘッドにおけるプライの出口付近のプライの表面の温度を検知し、その検知温度がゴム被覆ヘッドの設定温度となるように発熱手段の発熱量を制御する。
請求項４に係る発明によれば、発熱手段と熱交換手段との間の熱伝導は、それらの間に配置された配管内を流れる液体により行われる。 According to the first aspect of the present invention, the higher the transfer speed of the cord, the lower the set temperature of the rubber-coated head and the lower the heating amount of the rubber-coated head.
According to the second aspect of the present invention, the surface temperature of the ply is detected, and the heat generation amount of the heat generating means is controlled so that the detected temperature becomes the set temperature of the rubber-coated head.
According to the invention of claim 3, the temperature of the surface of the ply near the outlet of the ply in the rubber-coated head is detected, and the heat generation amount of the heat generating means is controlled so that the detected temperature becomes the set temperature of the rubber-coated head. .
According to the fourth aspect of the present invention, the heat conduction between the heat generating means and the heat exchanging means is performed by the liquid flowing in the pipe disposed therebetween.

本発明によれば、コードの移送速度が上昇すると、発熱手段の発熱量が低下するように設定することで、ゴム被覆ヘッドの加熱量が低下するため、移送速度上昇後のゴムの温度上昇を速やかに抑えることができ、ブルーム及びゴムの焦げの発生を防止することができる。   According to the present invention, the heating amount of the rubber-coated head is reduced by setting the heating amount of the heating means to be reduced when the cord transfer speed is increased. It is possible to quickly suppress the occurrence of bloom and rubber scorching.

以下、本発明の実施形態について面を参照して説明する。
図１は本発明の実施形態に係る押出機の斜視図であり、図２はそのゴム被覆ヘッドのＢ−Ｂ断面図である。また、図３は図１のゴム被覆ヘッドの温度制御装置の構成を模式的に示した図、図４はその温度制御装置が備える温度設定テーブルの構成を示す図、図５はその温度制御装置の動作のフロー図である。図１、２において、図６、７と同一の部分には図６、７で使用した符号を付した。また、図３におけるゴム被覆ヘッド４’はコード５の入口側から見た概略断面図である。さらに、図３の温度制御装置における配管系は図１のゴム被覆ヘッド４’に接続されているものであるが、便宜上、図１では省略した。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view of an extruder according to an embodiment of the present invention, and FIG. 2 is a BB cross-sectional view of the rubber-coated head. 3 is a diagram schematically showing the configuration of the temperature control device for the rubber-coated head of FIG. 1, FIG. 4 is a diagram showing the configuration of a temperature setting table provided in the temperature control device, and FIG. 5 is the temperature control device. FIG. 1 and 2, the same parts as those in FIGS. 6 and 7 are denoted by the same reference numerals used in FIGS. Further, the rubber-coated head 4 ′ in FIG. 3 is a schematic sectional view as seen from the inlet side of the cord 5. Further, the piping system in the temperature control apparatus of FIG. 3 is connected to the rubber-coated head 4 ′ of FIG. 1, but is omitted in FIG. 1 for convenience.

本実施形態に係る押出機においては、図２に示されているように、ダイ１４ａ，１４ｂの前方におけるプライ６の出口付近に温度センサ２１を設けた。この温度センサ２１は熱電対からなり、ダイ１４ａ，１４ｂの隙間の通路１７から送出されるプライ６の表面のゴムの温度を検知し、その温度検知信号を後述する温度制御装置の温度制御部へ出力する。   In the extruder according to the present embodiment, as shown in FIG. 2, a temperature sensor 21 is provided in the vicinity of the outlet of the ply 6 in front of the dies 14a and 14b. This temperature sensor 21 comprises a thermocouple, detects the temperature of the rubber on the surface of the ply 6 delivered from the passage 17 in the gap between the dies 14a and 14b, and sends the temperature detection signal to the temperature control unit of the temperature control device described later. Output.

温度制御装置は、図３に示されているように、温度センサ２１と、ポンプ２３と、ポンプ２３とゴム被覆ヘッド４’の周囲との間を温水が循環するように配置した配管系２２と、配管系２２内に設けられたヒータ２４と、ヒータ２４の発熱量を制御する温度制御部２５とからなる。なお、この図では、配管系２２の内、ゴム被覆ヘッド４’内の部分は、インサータホルダ１２及び図示されていないダイ１４ａ，１４ｂの周囲を上側から反時計回りにほぼ周回しているが、この形態に限定されるものではなく、例えば上側から左右に分岐し、下側で合流する形態にしてもよい。また、図示されていないが、配管系２２の内、ゴム被覆ヘッド４’内の部分には熱交換部材であるヒートシンクが設けられていることは言うまでもない。   As shown in FIG. 3, the temperature control device includes a temperature sensor 21, a pump 23, and a piping system 22 arranged so that hot water circulates between the pump 23 and the periphery of the rubber-coated head 4 ′. The heater 24 is provided in the piping system 22 and a temperature control unit 25 that controls the amount of heat generated by the heater 24. In this figure, the portion of the piping system 22 in the rubber-coated head 4 'circulates around the inserter holder 12 and the dies 14a and 14b (not shown) almost counterclockwise from above. It is not limited to this form, For example, you may make it the form branched from the upper side to right and left, and merged in the lower side. Although not shown, it goes without saying that a heat sink as a heat exchange member is provided in a portion of the piping system 22 in the rubber-coated head 4 '.

温度制御部２５はＰＬＣ（プログラマブル・ロジック・コントローラ）等で構成されており、温度センサ２１で検出された温度検知信号、及び押出機の制御装置（図示せず）で生成されたコード５の移送速度信号が入力される。本実施形態において、コード５の移送速度はＶ１，Ｖ２，Ｖ３，Ｖ４（Ｖ１＜Ｖ２＜Ｖ３＜Ｖ４）の４つの速度の何れかを任意に選択可能であり、温度制御部２５には、図４に示されているような、コードの移送速度Ｖ１，Ｖ２，Ｖ３，Ｖ４の各々に対してゴム被覆ヘッド４’の設定温度Ｔ１，Ｔ２，Ｔ３，Ｔ４（Ｔ１＞Ｔ２＞Ｔ３＞Ｔ４）の対応関係を記述した温度設定テーブル２５ａが格納されており、温度制御部２５は、コード５の移送速度信号及び温度検知信号が入力されたときに、このテーブルを参照して、温度検知信号の値が設定温度になるようにヒータ２４へその発熱量を制御するための発熱制御信号を出力する。   The temperature control unit 25 is composed of a PLC (programmable logic controller) or the like, and transfers the temperature detection signal detected by the temperature sensor 21 and the code 5 generated by the control device (not shown) of the extruder. A speed signal is input. In the present embodiment, the transfer speed of the cord 5 can be arbitrarily selected from any of the four speeds V1, V2, V3, and V4 (V1 <V2 <V3 <V4). As shown in FIG. 4, the set temperature T1, T2, T3, T4 (T1> T2> T3> T4) of the rubber-coated head 4 ′ for each of the cord transfer speeds V1, V2, V3, V4. The temperature setting table 25a describing the correspondence is stored, and the temperature control unit 25 refers to this table when the transfer speed signal and the temperature detection signal of the code 5 are input, and the value of the temperature detection signal is referred to. Outputs a heat generation control signal for controlling the amount of heat generation to the heater 24 so that becomes a set temperature.

以上のように構成された押出機において、図１に示されているゴム生成部１からシリンダ３へ供給されたゴムは、シリンダ３のスクリューの作用下で混練・溶融されながらシリンダ３の先端へ移送され、ゴム被覆ヘッド４’に供給されて、紙面の裏面側からゴム流路１４ａ，１４ｂに注入される。一方、図示されていないコード移送手段により張力を付与されて所定の速度で移送されている複数本のコード５は、ゴム被覆ヘッド４’の後端からインサータ１１に導入され、所定の相対配列に保持されて、その前端からコード通路１３とゴム流路１５ａ，１５ｂとの交差部１６に移送され、上下両面にゴムが被覆される。ゴムで被覆された引き揃えコード（プライ）６は、上下のダイ１４ａ，１４ｂの間の通路１７を通過するときに上下の厚みが決定され、上下のダイ１４ａ，１４ｂの前端から前方へ送出される。このとき、図３に示されている配管系２２内の水は、コード５の移送速度に応じて予め定められた温度になるように、温度制御部２５によりヒータ２４の発熱量が制御されている。   In the extruder configured as described above, the rubber supplied from the rubber generating unit 1 shown in FIG. 1 to the cylinder 3 is kneaded and melted under the action of the screw of the cylinder 3 to the tip of the cylinder 3. It is transferred, supplied to the rubber coating head 4 ', and injected into the rubber flow paths 14a and 14b from the back side of the paper. On the other hand, a plurality of cords 5 which are tensioned by a cord transport means (not shown) and are transported at a predetermined speed are introduced into the inserter 11 from the rear end of the rubber-coated head 4 ′, and are arranged in a predetermined relative arrangement. It is held and transferred from its front end to the intersection 16 between the cord passage 13 and the rubber passages 15a and 15b, and the upper and lower surfaces are covered with rubber. When the alignment cord (ply) 6 covered with rubber passes through the passage 17 between the upper and lower dies 14a and 14b, the upper and lower thicknesses are determined, and are sent forward from the front ends of the upper and lower dies 14a and 14b. The At this time, the amount of heat generated by the heater 24 is controlled by the temperature controller 25 so that the water in the piping system 22 shown in FIG. 3 has a predetermined temperature according to the transfer speed of the cord 5. Yes.

次に、温度制御装置の動作について、図５のフロー図を参照しながら説明する。なお、この図に示されている処理は一定時間毎に繰り返し実行される。   Next, the operation of the temperature control device will be described with reference to the flowchart of FIG. The process shown in this figure is repeatedly executed at regular intervals.

まず温度制御部２５は、コード移送速度信号を取り込み（ステップＳ１）、次に温度設定テーブル２５ａを参照する（ステップＳ２）。そして、温度設定テーブル２５ａの内容を基に、ゴム被覆ヘッド４’の温度が移送速度信号の速度値に対応する設定温度になるように、ヒータ２４の発熱量を制御するための発熱制御信号をヒータ２４へ供給する（ステップＳ３）。従って、例えばコード５の移送速度がＶ１からＶ２へ加速された場合には、設定温度がＴ１からＴ２へ低下するので、ヒータ２４に供給する発熱制御信号によるヒータ２４の発熱量が急激に低下する。   First, the temperature control unit 25 takes in the code transfer speed signal (step S1), and then refers to the temperature setting table 25a (step S2). Then, based on the contents of the temperature setting table 25a, a heat generation control signal for controlling the heat generation amount of the heater 24 so that the temperature of the rubber-coated head 4 ′ becomes a set temperature corresponding to the speed value of the transfer speed signal. Supply to the heater 24 (step S3). Therefore, for example, when the transfer speed of the cord 5 is accelerated from V1 to V2, the set temperature decreases from T1 to T2, and therefore the amount of heat generated by the heater 24 by the heat generation control signal supplied to the heater 24 rapidly decreases. .

次に、温度検知信号を取り込み（ステップＳ４）、その検知温度と設定温度との高低の関係を判断する（ステップＳ５）。そして、検知温度が設定温度より高い場合にはヒータ２４の発熱量を低下させるように制御する（ステップＳ６）。コード５の移送速度の加速直後はこの処理を実行することになる。逆に、検知温度が設定温度より低い場合にはヒータ２４の発熱量を増加させるように制御する（ステップＳ７）。検知温度と設定温度とが等しい場合には、そのまま処理を終える。   Next, a temperature detection signal is fetched (step S4), and the relationship between the detected temperature and the set temperature is determined (step S5). When the detected temperature is higher than the set temperature, control is performed so as to reduce the amount of heat generated by the heater 24 (step S6). This process is executed immediately after the acceleration of the code 5 transfer speed. Conversely, when the detected temperature is lower than the set temperature, control is performed to increase the amount of heat generated by the heater 24 (step S7). If the detected temperature is equal to the set temperature, the process is finished as it is.

このように、本実施形態によれば、コード５の移送速度が加速されると、加速後の移送速度に対して予め定めておいた設定温度にプライ６の温度が低下するように制御するので、一定温度に制御していた従来装置と比較すると、プライ６の温度上昇を速やかに抑えることができる。このため、ブルーム及びゴムの焦げの発生を防止しつつ、コード５の移送速度の高速化ができる。実験の結果、ゴム被覆ヘッド４’の出口付近のプライ６の温度を１１０℃以下に保つという条件の下に、従来は５mm/分が移送速度の上限であったが、本実施形態によれば１２.0mm/分まで速度を上げることが可能なことを確認している。   As described above, according to the present embodiment, when the transfer speed of the cord 5 is accelerated, the temperature of the ply 6 is controlled to be lowered to a preset temperature that is set in advance with respect to the transfer speed after the acceleration. Compared with the conventional device that has been controlled to a constant temperature, the temperature rise of the ply 6 can be quickly suppressed. For this reason, the transfer speed of the cord 5 can be increased while preventing the occurrence of bloom and rubber scorching. As a result of the experiment, under the condition that the temperature of the ply 6 near the outlet of the rubber-coated head 4 ′ is kept at 110 ° C. or lower, the upper limit of the transfer speed is 5 mm / min. It has been confirmed that the speed can be increased up to 12.0 mm / min.

本発明の実施形態に係る押出機の斜視図である。It is a perspective view of an extruder concerning an embodiment of the present invention. 図１におけるゴム被覆ヘッドのＢ−Ｂ断面図である。It is BB sectional drawing of the rubber coating head in FIG. 本発明の実施形態における温度制御装置の構成を模式的に示した図である。It is the figure which showed typically the structure of the temperature control apparatus in embodiment of this invention. 図３の温度制御装置が備える水温設定テーブルの構成を示す図、The figure which shows the structure of the water temperature setting table with which the temperature control apparatus of FIG. 本発明の実施形態における温度制御装置の動作のフロー図である。It is a flowchart of operation | movement of the temperature control apparatus in embodiment of this invention. インシュレーション方式による従来の押出機の斜視図である。It is a perspective view of the conventional extruder by an insulation system. 図６におけるゴム被覆ヘッドのＡ−Ａ断面図である。It is AA sectional drawing of the rubber coating head in FIG.

符号の説明Explanation of symbols

４′・・・ゴム被覆ヘッド、５・・・コード、６・・・プライ、２１・・・温度センサ、２２・・・配管系、２４・・・ヒータ、２５・・・温度制御部。   4 '... rubber-coated head, 5 ... cord, 6 ... ply, 21 ... temperature sensor, 22 ... piping system, 24 ... heater, 25 ... temperature control unit.

Claims (4)

移送速度が切替え可能に移送されているコードにゴムを被覆してプライを形成するインシュレーション方式のゴム被覆ヘッドに対する加熱量を制御することでその温度を制御する温度制御装置であって、前記ゴム被覆ヘッドに取り付けられた熱交換手段と、前記熱交換手段と熱的に接続される発熱手段と、前記移送速度に応じて前記移送速度が高い程前記ゴム被覆ヘッドの温度を低く設定する温度設定手段と、前記温度設定手段の設定温度に応じて前記発熱手段の発熱量を制御する発熱制御手段とを備えたことを特徴とするゴム被覆ヘッドの温度制御装置。   A temperature control device that controls the temperature by controlling the amount of heat applied to an insulation-type rubber-coated head in which a ply is formed by coating rubber on a cord that is transferred so that the transfer speed can be switched. Heat exchange means attached to the coating head, heat generation means thermally connected to the heat exchange means, and temperature setting for setting the temperature of the rubber coating head lower as the transfer speed is higher in accordance with the transfer speed And a heat generation control means for controlling a heat generation amount of the heat generation means in accordance with a set temperature of the temperature setting means. 請求項１記載のゴム被覆ヘッドの温度制御装置において、前記プライの表面の温度を検知する温度検知手段を備え、前記発熱制御手段は、前記温度検知手段で検知された温度が前記設定温度となるように前記発熱量を制御することを特徴とするゴム被覆ヘッドの温度制御装置。   2. The temperature control device for a rubber-coated head according to claim 1, further comprising temperature detection means for detecting a temperature of the surface of the ply, wherein the heat generation control means has a temperature detected by the temperature detection means as the set temperature. As described above, a temperature control device for a rubber-coated head, which controls the amount of generated heat. 請求項２記載のゴム被覆ヘッドの温度制御装置において、前記温度検知手段を前記ゴム被覆ヘッドにおけるプライの出口付近に設けたことを特徴とするゴム被覆ヘッドの温度制御装置。   3. The temperature control device for a rubber-coated head according to claim 2, wherein the temperature detecting means is provided in the vicinity of the ply outlet of the rubber-coated head. 請求項１記載のゴム被覆ヘッドの温度制御装置において、前記熱交換手段と前記発熱手段とは、それらの間に配置された配管及び該配管内を流れる液体により熱的に接続されることを特徴とするゴム被覆ヘッドの温度制御装置。   2. The temperature control apparatus for a rubber-coated head according to claim 1, wherein the heat exchanging means and the heat generating means are thermally connected by a pipe disposed therebetween and a liquid flowing in the pipe. A temperature control device for a rubber-coated head.
JP2004209123A 2004-07-15 2004-07-15 Temperature control device for rubber-coated head Expired - Fee Related JP4424543B2 (en)

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FR3022822B1 (en) * 2014-06-30 2016-10-28 Michelin & Cie METHOD AND DEVICE FOR MANUFACTURING RUBBER-COATED METAL WIRE
NL2014454B1 (en) 2015-03-13 2016-10-14 Vmi Holland Bv Extruder and method for extruding cord reinforced tire components.
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