JP3983064B2 - Rubber sheet molding equipment - Google Patents

Rubber sheet molding equipment Download PDF

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Publication number
JP3983064B2
JP3983064B2 JP2002046811A JP2002046811A JP3983064B2 JP 3983064 B2 JP3983064 B2 JP 3983064B2 JP 2002046811 A JP2002046811 A JP 2002046811A JP 2002046811 A JP2002046811 A JP 2002046811A JP 3983064 B2 JP3983064 B2 JP 3983064B2
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Japan
Prior art keywords
rubber
rubber material
width
sheet
rubber sheet
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Expired - Fee Related
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JP2002046811A
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Japanese (ja)
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JP2003245935A (en
Inventor
健二 小川
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Bridgestone Corp
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Bridgestone Corp
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Priority to JP2002046811A priority Critical patent/JP3983064B2/en
Application filed by Bridgestone Corp filed Critical Bridgestone Corp
Priority to EP08020380.5A priority patent/EP2033763B1/en
Priority to US10/505,118 priority patent/US20050116374A1/en
Priority to ES03707011T priority patent/ES2316730T3/en
Priority to DE60325562T priority patent/DE60325562D1/en
Priority to PCT/JP2003/001981 priority patent/WO2003070453A1/en
Priority to ES08020380.5T priority patent/ES2473616T3/en
Priority to EP03707011A priority patent/EP1486320B1/en
Publication of JP2003245935A publication Critical patent/JP2003245935A/en
Application granted granted Critical
Publication of JP3983064B2 publication Critical patent/JP3983064B2/en
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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
    • B29C48/03—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
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • B29C48/10—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels flexible, e.g. blown foils
    • 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
    • B29C2948/92133—Width or height
    • 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
    • B29C2948/92428—Calibration, after-treatment, or cooling 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
    • B29C2948/9258—Velocity
    • B29C2948/9259—Angular velocity
    • 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
    • B29C2948/92609—Dimensions
    • B29C2948/92628—Width or height
    • 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
    • B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
    • B29C2948/92885—Screw or gear

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

Description

【０００１】
【発明の属する技術分野】
本発明は、タイヤの構成部材の薄ゲージシートなどを形成するためのゴムシートの成形装置に関する。
【０００２】
【従来の技術】
所定幅のゴムシートを高い精度で連続して形成する場合、従来は図５に示すように最終的にカレンダロール01から送り出されたゴムシートから必要形状部02のみを切り出して残りの部分03は練り返しゴムとして押出機等に返し練り返しに供するようにしていた。
【０００３】
カレンダロールへのゴム材料の吐出量変化が成形されるゴムシートの幅に影響して幅バラツキとして現れ、特に成形するゴムシートの両側縁部が先細に傾斜したテーパ部を有するものであると、高い幅精度を得るのは困難で、そのためカレンダロール01により送り出されるゴムシートを所要形状に切り出すことが行われ、残りの返しゴム03は練り返しに供されることになる。
【０００４】
品質向上のためゴムシートのテーパ部の傾斜角度を小さく(鋭角に)すればする程、幅精度を上げることは難しく、所要形状に切り出すことが益々必要になってくる。
【０００５】
【発明が解決しようとする課題】
しかしカレンダロール01によりゴムシートを所要形状に切り出すことは、残りの部分03を練り返しに供するための練り返し機能を必要とし、スペース上不利になるとともに、トラブルも生じ易くなり生産性を阻害するおそれがある。
【０００６】
また練り返しを繰り返すことは、ゴム特性を変化させることにもなり、品質を安定させるためには、極力行いたくない作業である。
【０００７】
なお図６に示すような１ローラダイ05によりゴムシートを高い幅精度で成形する方法もあるが、１ローラダイ05は重厚でありコスト高であるとともに、微量のゴム漏れが生じ、定期的な処理を必要とする。
【０００８】
本発明は、斯かる点に鑑みなされたもので、その目的とする処は、練り返しゴムを生じさせずに高い形状精度および品質のゴムシートを成形する簡素な設備のゴムシート成形装置を安価に供する点にある。
【０００９】
【課題を解決するための手段および作用効果】
上記目的を達成するために、本請求項１記載の発明は、投入されたゴム材料を押出す押出機と、押出されたゴム材料を定量吐出させる定量吐出ポンプと、定量吐出されたゴム材料を偏平帯状に形成する口金と、前記口金より吐出する偏平帯状のゴム材料をさらに所定の偏平帯状のゴムシートに形成して送り出すカレンダロールと、前記カレンダロールから送り出されたゴムシートの幅を検出する幅センサと、前記幅センサが検出したゴムシートの幅に基づき前記定量吐出ポンプの駆動をフィードバック制御して所定幅のゴムシートを送り出すシート幅制御手段と、前記定量吐出ポンプの入口におけるゴム材料の圧力を検出する圧力センサと、前記圧力センサが検出したゴム材料の圧力に基づき前記押出機の駆動をフィードバック制御してゴム材料の圧力を適正に維持させる圧力制御手段とを備えたゴムシート成形装置とした。
【００１０】
カレンダロールから送り出されるゴムシートの幅は、定量吐出ポンプからのゴム材料の吐出量に影響されるので、幅センサが検出したゴムシートの幅に基づきシート幅制御手段が、定量吐出ポンプの駆動をフィードバック制御することで、練り返しゴムを生じさせることなく、所定幅のゴムシートを精度良く安定して成形し送り出すことができる。
【００１１】
シート幅制御手段および幅センサの制御系を設けるだけでよいので、スペース的に殆ど拡大することはなく、従来の練り返し機能が不要で簡素で安価な設備としてスペース上有利であり、トラブルも少なく生産性を阻害することは極めて少ない。
練り返しを行わないので、ゴム特性も変化せず高品質を維持することができる。
【００１３】
圧力制御手段が押出機をフィードバック制御して、押出機から押出され定量吐出ポンプの入口に至ったゴム材料の圧力を一定範囲内に維持することで、定量吐出ポンプからの吐出量も適正に保ってカレンダロールから送り出されるゴムシートの形状を適正に維持することを容易にすることができる。
【００１４】
請求項２記載の発明は、請求項１記載のゴムシート成形装置において、前記定量吐出ポンプと前記口金との間に整流管を介装し、前記ゴム材料を偏平帯状に形成する口金に偏りなくゴム材料を供給することを特徴とする。
【００１５】
定量吐出ポンプからヘッドまでの距離が短いとヘッド内へのゴムの充填具合にバラツキがでるので、定量吐出ポンプと口金との間に整流管を介装してヘッドへのゴム材料の充填の偏りをなくして適正に保ち安定化することができる。
【００１６】
【発明の実施の形態】
以下本発明に係る一実施の形態について図１ないし図４に基づき説明する。
本実施の形態に係るゴムシート成形装置10の外観斜視図を図１に、側面図を図２に示す。
該ゴムシート成形装置10は、タイヤ構成部材の薄ゲージシートを形成するためのスムースシート１を連続して成形するものである。
【００１７】
スムースシート１は、偏平帯状に成形され、両端縁部が先細に傾斜したテーパ部１ａ，１ａを有していて、斯かるスムースシート１を互いにテーパ部１ａを順次重ねながら１枚の薄ゲージシートを形成する。
【００１８】
ゴムシート成形装置10は、図１および図２に示すように押出機11，ギヤポンプ12，整流管13，ヘッド14の口金15，カレンダロール16の順に構成されており、押出機11に投入されたゴム材料が成形されてカレンダロール16からスムースシート１として連続して排出される。
【００１９】
押出機11は、投入されたゴム材料等をスクリューの回転により混練しながらギヤポンプ12に押出していく。
ギヤポンプ12は、押出機11により押出されてきたゴム材料をギヤの回転速度に基づく定量の吐出量に制御して整流管13に吐出する定量吐出ポンプである。
【００２０】
整流管13は、ギヤポンプ12とヘッド14の口金15とを連結して両者間に適当な距離を持たせる距離延長管であり、必要に応じて介装する。
【００２１】
ギヤポンプ12からのゴム材料の吐出は集中することが多く、そのためギヤポンプ12からヘッド14までの距離が短いとヘッド14内へのゴムの充填具合にバラツキがでるので、ギヤポンプ12と口金15との間に整流管13を介装してヘッド14へのゴム材料の充填の偏りをなくして適正に保ち安定化することができる。
【００２２】
ヘッド14の口金15は、成形しようとするスムースシート１の目標断面形状に略近い口金形状を有している。
【００２３】
スムースシート１の目標断面形状は、図３の▲１▼に示すように偏平板状をして両端縁部が先細に傾斜したテーパ部１ａ，１ａを有しており、これに対して口金15の口金形状は、図３の▲２▼に示すように同じく両端縁にテーパ部を有して目標断面形状に略外観を近づけた形状をしている。
ただし口金形状は、テーパ部の先端が欠損している。
【００２４】
口金15の口金形状を目標断面形状に倣うようにすることで、ゴムの横流れを防止し安定したスムースシート１が得られる。
さらに両端縁にテーパ部を有したスムースシートを成形する場合は、口金15の口金形状にも両端にテーパ部を有することでゴムボリュームを合わせてより安定したスムースシート１を成形することができる。
【００２５】
斯かる口金15の口金形状に形成されたゴム材料がカレンダロール16の上下２つのロール間に吐出される。
カレンダロール16は、所定の外周面形状をなす上下のロールにより口金15から吐出されたゴム材料を挟み込んで目標断面形状に型付けして最終的なスムースシート１を成形して連続して送り出す。
【００２６】
練り返しゴムを生じさせずにスムースシート１が目標断面形状を形成するためには、ギアポンプ12によりスムースシート１の目標断面形状を形成するに必要十分な適正な量が安定して吐出供給される必要がある。
【００２７】
しかし温度変化やゴム性状の微小バラツキによりギヤポンプ12の吐出量が微量に変化し、この変化はスムースシート１の幅に大きく影響する。
そこで本ゴムシート成形装置10は、カレンダロール16から排出されたスムースシート１の幅をフィードバック制御するシート幅制御手段20を備えている。
【００２８】
すなわちスムースシート１の幅を光学的に検出する光センサである幅センサ17をカレンダロール16の下流に設け（図１参照）、図４に示すようにシート幅制御手段20が同幅センサ17の検出幅に基づきギヤポンプ12をフィードバック制御するものである。
【００２９】
同時に本ゴムシート成形装置10は、図４に示すようにギヤポンプ12にゴム材料を供給する押出機11についてゴム材料の供給圧力を制御する圧力制御手段25を備えている。
【００３０】
そのためギヤポンプ12の入口に圧力センサ26が設けられ、同圧力センサ26の検出圧力に基づき圧力制御手段25が押出機11をフィードバック制御し、常に一定範囲の圧力でゴム材料が安定して供給されるよう制御している。
【００３１】
こうして一定範囲の圧力でゴム材料が供給されるギヤポンプ12は、シート幅制御手段20によりフィードバック制御され、スムースシート１の幅を監視して微小変化に対応してゴム吐出量が適正制御されることで、スムースシート１の幅精度を高く維持することができる。
【００３２】
以上のように本ゴムシート成形装置10は、練り返しゴムを生じさせることなく精度の高い断面形状のスムースシート１を成形することができるので、練り返しの繰り返しによるゴム品質の低下がなく、練り返し機能が不要であるため、簡素で安価な設備としてスペース上有利であり、トラブルも少なく生産性を阻害することは少ない。
【図面の簡単な説明】
【図１】本発明の一実施の形態に係るゴムシート成形装置の外観斜視図である。
【図２】該ゴムシート成形装置の側面図である。
【図３】スムースシートの目標断面形状および口金形状を示す図である。
【図４】該ゴムシート成形装置の制御系のブロック図である。
【図５】従来の練り返しを伴うカレンダロールを示す図である。
【図６】従来の１ローラダイを示す図である。
【符号の説明】
１…スムースシート、
10…ゴムシート成形装置、11…押出機、12…ギヤポンプ、13…整流管、14…ヘッド、15…口金、16…カレンダロール、
20…シート幅制御手段、21…幅センサ、25…圧力制御手段、26…圧力センサ。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a rubber sheet molding apparatus for forming a thin gauge sheet or the like of a constituent member of a tire.
[0002]
[Prior art]
When a rubber sheet having a predetermined width is continuously formed with high accuracy, conventionally, only the necessary shape portion 02 is cut out from the rubber sheet finally sent from the calendar roll 01 as shown in FIG. It was made to return to an extruder etc. as a reconstituted rubber and to be used for reconstitution.
[0003]
The change in the discharge amount of the rubber material to the calendar roll appears as a width variation by affecting the width of the rubber sheet to be molded, and particularly when both side edges of the rubber sheet to be molded have tapered portions that are tapered, It is difficult to obtain a high width accuracy. Therefore, the rubber sheet sent out by the calendar roll 01 is cut into a required shape, and the remaining return rubber 03 is used for refining.
[0004]
As the inclination angle of the taper portion of the rubber sheet is made smaller (a sharp angle) for quality improvement, it becomes more difficult to increase the width accuracy, and it becomes increasingly necessary to cut out to the required shape.
[0005]
[Problems to be solved by the invention]
However, cutting out the rubber sheet into the required shape with the calendar roll 01 requires a re-rolling function to recycle the remaining portion 03, which is disadvantageous in terms of space and is liable to cause troubles and hinders productivity. There is a fear.
[0006]
Repeating reworking also changes the rubber properties, and is an operation that is not desired to be performed as much as possible in order to stabilize the quality.
[0007]
Although there is a method of molding a rubber sheet with a high width accuracy by using a one-roller die 05 as shown in FIG. 6, the one-roller die 05 is heavy and expensive, and a minute amount of rubber leakage occurs, so that periodic processing is performed. I need.
[0008]
The present invention has been made in view of the above points, and the object of the present invention is to inexpensively manufacture a rubber sheet molding apparatus having a simple facility for molding a rubber sheet with high shape accuracy and quality without producing a rubber mixture. It is in the point to be used for.
[0009]
[Means for solving the problems and effects]
In order to achieve the above object, the invention described in claim 1 includes an extruder for extruding a charged rubber material, a metering discharge pump for metering and discharging the extruded rubber material, and a metering and discharging rubber material. A base formed in a flat strip shape, a calender roll that is formed by feeding a flat strip-shaped rubber material discharged from the base into a predetermined flat strip-shaped rubber sheet, and the width of the rubber sheet fed from the calender roll is detected. A width sensor; a sheet width control unit that feeds back a rubber sheet having a predetermined width by feedback-controlling driving of the metering discharge pump based on a width of the rubber sheet detected by the width sensor ; and a rubber material at an inlet of the metering discharge pump. A pressure sensor that detects pressure, and feedback control of the drive of the extruder based on the pressure of the rubber material detected by the pressure sensor to Was fee rubber sheet forming apparatus that includes a pressure control means to properly maintain pressure.
[0010]
Since the width of the rubber sheet delivered from the calendar roll is affected by the amount of rubber material discharged from the metering discharge pump, the sheet width control means drives the metering discharge pump based on the width of the rubber sheet detected by the width sensor. By performing feedback control, a rubber sheet having a predetermined width can be molded and sent out with high accuracy and stability without generating re-rolled rubber.
[0011]
Since it is only necessary to provide a control system for the sheet width control means and the width sensor, there is almost no increase in space, and there is no need for a conventional re-rolling function, which is advantageous in terms of space as a simple and inexpensive facility, and there are few troubles. There is very little inhibition of productivity.
Since re-mixing is not performed, the rubber properties are not changed and high quality can be maintained.
[0013]
The pressure control means feedback-controls the extruder and maintains the pressure of the rubber material extruded from the extruder and reaching the inlet of the metering discharge pump within a certain range. Thus, it is possible to easily maintain the shape of the rubber sheet fed from the calendar roll appropriately.
[0014]
According to a second aspect of the invention, the rubber sheet forming apparatus according to claim 1, wherein the interposed a rectifying tube between the dispensing pump and the mouthpiece, without bias to the base to form the rubber material into a flat strip A rubber material is supplied.
[0015]
If the distance from the metering pump to the head is short, there will be variations in the filling of the rubber into the head, so there is a bias in filling the rubber material into the head by inserting a rectifier pipe between the metering pump and the base. Can be maintained properly and stabilized.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment according to the present invention will be described with reference to FIGS.
FIG. 1 is an external perspective view of a rubber sheet forming apparatus 10 according to the present embodiment, and FIG. 2 is a side view thereof.
The rubber sheet forming apparatus 10 continuously forms a smooth sheet 1 for forming a thin gauge sheet of a tire constituent member.
[0017]
The smooth sheet 1 is formed into a flat band shape, and has tapered portions 1a and 1a whose both end edges are tapered, and the smooth sheet 1 is formed as one thin gauge sheet while the taper portions 1a are sequentially stacked on each other. Form.
[0018]
As shown in FIGS. 1 and 2, the rubber sheet forming apparatus 10 is composed of an extruder 11, a gear pump 12, a rectifying pipe 13, a cap 15 of a head 14, and a calendar roll 16. A rubber material is molded and continuously discharged from the calendar roll 16 as a smooth sheet 1.
[0019]
The extruder 11 extrudes the charged rubber material or the like into the gear pump 12 while kneading by rotating the screw.
The gear pump 12 is a fixed discharge pump that controls the rubber material extruded by the extruder 11 to a fixed discharge amount based on the rotation speed of the gear and discharges it to the rectifying pipe 13.
[0020]
The rectifying pipe 13 is a distance extension pipe that connects the gear pump 12 and the base 15 of the head 14 to provide an appropriate distance therebetween, and is interposed as necessary.
[0021]
Since the discharge of rubber material from the gear pump 12 is often concentrated, if the distance from the gear pump 12 to the head 14 is short, there will be variations in the rubber filling condition in the head 14, so the gap between the gear pump 12 and the base 15 Further, the rectifying pipe 13 is interposed to eliminate uneven biasing of the rubber material into the head 14 and can be maintained appropriately and stabilized.
[0022]
The base 15 of the head 14 has a base shape that is substantially close to the target cross-sectional shape of the smooth sheet 1 to be molded.
[0023]
The target cross-sectional shape of the smooth sheet 1 has taper portions 1a and 1a that are flat and have tapered edges at both ends as shown in (1) of FIG. As shown in (2) of FIG. 3, the cap shape has a tapered portion at both end edges, and has a shape close to the target cross-sectional shape.
However, the tip of the tapered portion is missing in the base shape.
[0024]
By making the base shape of the base 15 follow the target cross-sectional shape, it is possible to prevent the lateral flow of rubber and obtain a stable smooth sheet 1.
Further, when a smooth sheet having tapered portions at both ends is formed, the stable shape of the smooth sheet 1 can be formed by matching the rubber volume by having the tapered portions at both ends of the base shape of the base 15 as well.
[0025]
The rubber material formed in the base shape of the base 15 is discharged between the upper and lower two rolls of the calendar roll 16.
The calender roll 16 sandwiches the rubber material discharged from the base 15 with upper and lower rolls having a predetermined outer peripheral surface shape, molds the rubber material into a target cross-sectional shape, forms the final smooth sheet 1 and continuously sends it out.
[0026]
In order for the smooth sheet 1 to form the target cross-sectional shape without generating the kneaded rubber, the gear pump 12 stably discharges and supplies an appropriate amount sufficient to form the target cross-sectional shape of the smooth sheet 1. There is a need.
[0027]
However, the discharge amount of the gear pump 12 changes to a very small amount due to temperature changes and minute variations in rubber properties, and this change greatly affects the width of the smooth sheet 1.
Therefore, the rubber sheet forming apparatus 10 includes a sheet width control unit 20 that performs feedback control of the width of the smooth sheet 1 discharged from the calendar roll 16.
[0028]
That is, a width sensor 17 which is an optical sensor for optically detecting the width of the smooth sheet 1 is provided downstream of the calendar roll 16 (see FIG. 1). As shown in FIG. The gear pump 12 is feedback-controlled based on the detection width.
[0029]
At the same time, the rubber sheet forming apparatus 10 includes pressure control means 25 for controlling the supply pressure of the rubber material for the extruder 11 that supplies the rubber material to the gear pump 12, as shown in FIG.
[0030]
For this reason, a pressure sensor 26 is provided at the inlet of the gear pump 12, and the pressure control means 25 feedback-controls the extruder 11 based on the pressure detected by the pressure sensor 26, so that the rubber material is always stably supplied within a certain range of pressure. It is controlled as follows.
[0031]
In this way, the gear pump 12 to which the rubber material is supplied in a certain range of pressure is feedback-controlled by the sheet width control means 20, and the width of the smooth sheet 1 is monitored and the rubber discharge amount is appropriately controlled in response to a minute change. Thus, the width accuracy of the smooth sheet 1 can be maintained high.
[0032]
As described above, the rubber sheet forming apparatus 10 can form the smooth sheet 1 having a highly accurate cross-sectional shape without causing re-rolling rubber, so that the rubber quality does not deteriorate due to repeated re-rolling, and kneading is performed. Since the return function is not required, it is advantageous in terms of space as a simple and inexpensive facility, and there are few troubles and productivity is hardly hindered.
[Brief description of the drawings]
FIG. 1 is an external perspective view of a rubber sheet forming apparatus according to an embodiment of the present invention.
FIG. 2 is a side view of the rubber sheet forming apparatus.
FIG. 3 is a diagram showing a target cross-sectional shape and a base shape of a smooth sheet.
FIG. 4 is a block diagram of a control system of the rubber sheet forming apparatus.
FIG. 5 is a view showing a conventional calender roll with kneading.
FIG. 6 is a view showing a conventional one-roller die.
[Explanation of symbols]
1 ... Smooth seat,
10 ... Rubber sheet molding device, 11 ... Extruder, 12 ... Gear pump, 13 ... Rectifier tube, 14 ... Head, 15 ... Base, 16 ... Calendar roll,
20 ... sheet width control means, 21 ... width sensor, 25 ... pressure control means, 26 ... pressure sensor.

Claims (2)

投入されたゴム材料を押出す押出機と、
押出されたゴム材料を定量吐出させる定量吐出ポンプと、
定量吐出されたゴム材料を偏平帯状に形成する口金と、
前記口金より吐出する偏平帯状のゴム材料をさらに所定の偏平帯状のゴムシートに形成して送り出すカレンダロールと、
前記カレンダロールから送り出されたゴムシートの幅を検出する幅センサと、
前記幅センサが検出したゴムシートの幅に基づき前記定量吐出ポンプの駆動をフィードバック制御して所定幅のゴムシートを送り出すシート幅制御手段と、
前記定量吐出ポンプの入口におけるゴム材料の圧力を検出する圧力センサと、
前記圧力センサが検出したゴム材料の圧力に基づき前記押出機の駆動をフィードバック制御してゴム材料の圧力を適正に維持させる圧力制御手段と、
を備えたことを特徴とするゴムシート成形装置。An extruder for extruding the charged rubber material;
A metering discharge pump for metering the extruded rubber material;
A base for forming a flat-banded rubber material,
A calender roll that is formed by feeding a flat strip-shaped rubber material discharged from the base into a predetermined flat strip-shaped rubber sheet;
A width sensor for detecting the width of the rubber sheet fed from the calendar roll;
A sheet width control unit that feeds back a rubber sheet having a predetermined width by feedback-controlling the driving of the fixed discharge pump based on the width of the rubber sheet detected by the width sensor;
A pressure sensor for detecting the pressure of the rubber material at the inlet of the metering discharge pump;
Pressure control means for feedback-controlling the driving of the extruder based on the pressure of the rubber material detected by the pressure sensor and maintaining the pressure of the rubber material appropriately;
A rubber sheet forming apparatus comprising: 前記定量吐出ポンプと前記口金との間に整流管を介装し、前記ゴム材料を偏平帯状に形成する口金に偏りなくゴム材料を供給することを特徴とする請求項１記載のゴムシート成形装置。2. A rubber sheet molding apparatus according to claim 1 , wherein a rectifying pipe is interposed between the metering discharge pump and the base, and the rubber material is supplied to the base that forms the rubber material in a flat band shape without any bias. .
JP2002046811A 2002-02-22 2002-02-22 Rubber sheet molding equipment Expired - Fee Related JP3983064B2 (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
JP2002046811A JP3983064B2 (en) 2002-02-22 2002-02-22 Rubber sheet molding equipment
US10/505,118 US20050116374A1 (en) 2002-02-22 2003-02-24 Thin rubber member producing method, rubber rolling device and rubber rolling method
ES03707011T ES2316730T3 (en) 2002-02-22 2003-02-24 METHOD FOR PRODUCING A MEMBER OF SLIM RUBBER, RUBBER LAMINATION DEVICE AND RUBBER ROLLING METHOD.
DE60325562T DE60325562D1 (en) 2002-02-22 2003-02-24 METHOD FOR PRODUCING A THIN CHUCK MEMBER, ROLLING MACHINE AND ROLLING MOLDING PROCESS
EP08020380.5A EP2033763B1 (en) 2002-02-22 2003-02-24 Method of manufacturing a thin rubber member, rubber roller, and method of rolling a rubber
PCT/JP2003/001981 WO2003070453A1 (en) 2002-02-22 2003-02-24 Thin rubber member producing method, rubber rolling device, and rubber rolling method
ES08020380.5T ES2473616T3 (en) 2002-02-22 2003-02-24 Method for manufacturing a thin rubber member, a rubber roller and method for rolling a rubber
EP03707011A EP1486320B1 (en) 2002-02-22 2003-02-24 Thin rubber member producing method, rubber rolling device, and rubber rolling method

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JP4738073B2 (en) 2005-06-27 2011-08-03 株式会社ブリヂストン Extrusion method of strip rubber for tire component and strip rubber extrusion system
US20090283203A1 (en) * 2006-08-09 2009-11-19 Maurizio Marchini Process and apparatus for building pneumatic tyres
DE112007003651T5 (en) * 2007-09-18 2010-12-30 Toyo Tire & Rubber Co., Ltd., Osaka-shi Extrusion device for rubber strip material and extrusion process for rubber strip material
KR101563326B1 (en) * 2009-12-23 2015-10-27 재단법인 포항산업과학연구원 Plastic sheet width measuring system and plastic sheet manufacturing mathod using the same
JP2022038689A (en) * 2020-08-27 2022-03-10 株式会社神戸製鋼所 Control unit and method for rubber sheet forming equipment and rubber sheet forming equipment
CN112936237B (en) * 2021-02-26 2024-04-19 中国农业大学 Force feedback control system and method of rubber tapping robot and rubber tapping robot

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