JP2017056666A - Kneading determination method in rubber kneader, and rubber kneading method - Google Patents
Kneading determination method in rubber kneader, and rubber kneading method Download PDFInfo
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- 238000004898 kneading Methods 0.000 title claims abstract description 223
- 238000000034 method Methods 0.000 title claims abstract description 48
- 230000002159 abnormal effect Effects 0.000 claims abstract description 30
- 238000005070 sampling Methods 0.000 claims abstract description 5
- 230000005856 abnormality Effects 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 6
- 230000008569 process Effects 0.000 abstract description 9
- 239000002994 raw material Substances 0.000 description 7
- 239000006229 carbon black Substances 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 230000002950 deficient Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/74—Mixing; Kneading using other mixers or combinations of mixers, e.g. of dissimilar mixers ; Plant
- B29B7/7476—Systems, i.e. flow charts or diagrams; Plants
- B29B7/7495—Systems, i.e. flow charts or diagrams; Plants for mixing rubber
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/02—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type
- B29B7/22—Component parts, details or accessories; Auxiliary operations
- B29B7/28—Component parts, details or accessories; Auxiliary operations for measuring, controlling or regulating, e.g. viscosity control
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/80—Component parts, details or accessories; Auxiliary operations
- B29B7/82—Heating or cooling
- B29B7/823—Temperature control
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/02—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type
- B29B7/06—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices
- B29B7/10—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices rotary
- B29B7/18—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices rotary with more than one shaft
- B29B7/183—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices rotary with more than one shaft having a casing closely surrounding the rotors, e.g. of Banbury type
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
Description
本発明は、混練機において混練りされた混練バッチ(ゴム組成物)の混練状態を判定するゴム混練機における混練判定方法およびゴムの混練り方法に関する。 The present invention relates to a kneading determination method and a rubber kneading method in a rubber kneader for determining a kneading state of a kneading batch (rubber composition) kneaded in a kneader.
バンバリーミキサーなどの混練機にポリマー、薬品、フィラー、オイルなどを投入してバッチ混練りする際には、従来より、ローターの回転数、温度、時間、PI(積算電力量:ローターに掛かった電力の総量)に基づいて混練りを制御しており、この混練り中は、電力量、温度、時間がチャートとして示される。 Conventionally, when batch kneading with polymers, chemicals, fillers, oils, etc. in a kneader such as a Banbury mixer, the number of revolutions of the rotor, temperature, time, PI (integrated power consumption: power applied to the rotor) Kneading is controlled on the basis of the total amount), and during this kneading, electric power, temperature, and time are shown as a chart.
しかし、従来より、混練り中には、設備の不良や練り不良、原料の投入忘れや投入間違いなどの工程の異常や、原材料自体の異常により混練バッチに異常が発生することがあった。 However, conventionally, during kneading, abnormalities have occurred in the kneading batch due to abnormalities in the process such as defective equipment, poor kneading, forgetting to add raw materials or mistaken raw materials, or abnormal raw materials themselves.
そこで、混練りされたバッチが正常に混練りされているか否かを判定する方法が種々検討されている(例えば、特許文献1)。 Thus, various methods for determining whether or not a kneaded batch is normally kneaded have been studied (for example, Patent Document 1).
しかしながら、従来の判定方法は、最終的なゴム検査をするまで異常の発生が分からず、異常バッチの発生が分かった時点で、直ちにラインを止めるものではなかったため、異常が発生した混練バッチを次工程にてそのまま使用してトラブルの発生を招いたり、異常が発生した混練バッチが混練機の下(アンダーバンバリー)で前後の正常な混練バッチと混ざってさらに異常が広がってしまったりする可能性があり、さらなる改良が求められている。 However, in the conventional judgment method, the occurrence of an abnormality is not known until the final rubber inspection, and the line is not stopped immediately after the occurrence of the abnormal batch is known. There is a possibility that problems may occur if the product is used as it is in the process, or the abnormal kneading batch may be mixed with the normal kneading batch before and after the under kneading machine (under banbury) to further spread the abnormality. There is a need for further improvements.
そこで、本発明は、混練バッチの混練りに際して異常バッチの発生を即座に判定して、発生した異常バッチの次工程への流出を防止することができる技術を提供することを課題とする。 Therefore, an object of the present invention is to provide a technique that can immediately determine the occurrence of an abnormal batch when kneading a kneading batch and prevent the generated abnormal batch from flowing out to the next process.
本発明者は、鋭意検討を行い、以下に記載する発明により上記課題が解決できることを見出し、本発明を完成させるに至った。 The inventor has intensively studied and found that the above-described problems can be solved by the invention described below, and has completed the present invention.
請求項1に記載の発明は、
ゴム混練機において混練りされた混練バッチが正常か異常かを判定するゴム混練機における混練判定方法であって、
正常である混練バッチがゴム混練機において混練りされた際の、少なくとも、電力および温度をパラメーターとして所定の周期でサンプリングして基準混練波形を予め作成すると共に、前記基準混練波形に対する許容範囲を予め決めておき、
その後、対象となる混練バッチについて混練波形を作成し、対象となる混練バッチについて得られた混練波形と、予め作成した前記基準混練波形に対する許容範囲とを比較照合することによって、混練バッチが正常であるか異常であるかの判定を行うことを特徴とするゴム混練機における混練判定方法である。
The invention described in claim 1
A kneading determination method in a rubber kneader for determining whether a kneading batch kneaded in a rubber kneader is normal or abnormal,
When a normal kneading batch is kneaded in a rubber kneader, a reference kneading waveform is prepared in advance by sampling at a predetermined cycle using at least power and temperature as parameters, and an allowable range for the reference kneading waveform is set in advance. Decide,
Thereafter, a kneading waveform is created for the target kneading batch, and the kneading batch is normal by comparing and collating the kneading waveform obtained for the target kneading batch with the permissible range for the reference kneading waveform created in advance. It is a kneading determination method in a rubber kneader characterized by determining whether it is present or abnormal.
請求項2に記載の発明は、
対象となる混練バッチについて得られた混練波形と、予め作成した基準混練波形に対する許容範囲との比較照合において、
前記混練バッチの混練波形が前記基準混練波形に対する許容範囲内である割合が、所定の割合以上である場合に混練バッチが正常であると判定し、前記所定の割合未満である場合に前記混練バッチが異常であると判定することを特徴とする請求項1に記載のゴム混練機における混練判定方法である。
The invention described in
In the comparison of the kneading waveform obtained for the target kneading batch and the allowable range for the reference kneading waveform created in advance,
When the proportion of the kneading batch that is within the allowable range with respect to the reference kneading waveform is equal to or greater than a predetermined proportion, the kneading batch is determined to be normal, and when the proportion is less than the predetermined proportion, the
請求項3に記載の発明は、
前記基準混練波形および前記基準混練波形に対する許容範囲を各種配合の混練対象毎に予め設定しておき、対応する前記基準混練波形および前記許容範囲を用いて各種配合の混練対象に対して前記判定を行うことを特徴とする請求項1または請求項2に記載のゴム混練機における混練判定方法である。
The invention according to
An allowable range for the reference kneading waveform and the reference kneading waveform is set in advance for each kneading target of various blends, and the determination is performed for the kneading target of various blends using the corresponding reference kneading waveform and the permissible range. The kneading determination method in the rubber kneader according to claim 1, wherein the kneading determination method is performed.
請求項4に記載の発明は、
前記基準混練波形の許容範囲を、それぞれのパラメーターについて、前記基準混練波形の0〜30%で設定することを特徴とする請求項1ないし請求項3のいずれか1項に記載のゴム混練機における混練判定方法である。
The invention according to claim 4
The rubber kneader according to any one of claims 1 to 3, wherein an allowable range of the reference kneading waveform is set to 0 to 30% of the reference kneading waveform for each parameter. This is a kneading determination method.
請求項5に記載の発明は、
前記混練バッチの混練波形が前記基準混練波形に対する許容範囲内である割合が60%以上である場合に正常と判定し、60%未満である場合に異常と判定することを特徴とする請求項1ないし請求項4のいずれか1項に記載のゴム混練機における混練判定方法である。
The invention described in claim 5
The kneading batch is determined to be normal when the proportion of the kneading waveform within an allowable range with respect to the reference kneading waveform is 60% or more, and is determined to be abnormal when it is less than 60%. It is the kneading | mixing determination method in the rubber kneader of any one of Claim 4 thru | or 4.
請求項6に記載の発明は、
ベース練り、リミル練り、または仕上げ練りにおいて適用されることを特徴とする請求項1ないし請求項5のいずれか1項に記載のゴム混練機における混練判定方法である。
The invention described in claim 6
The kneading determination method in a rubber kneader according to any one of claims 1 to 5, which is applied in base kneading, remill kneading, or finishing kneading.
請求項7に記載の発明は、
前記ゴム混練機がバンバリーミキサーであることを特徴とする請求項1ないし請求項6のいずれか1項に記載のゴム混練機における混練判定方法である。
The invention described in claim 7
The kneading determination method in the rubber kneader according to any one of claims 1 to 6, wherein the rubber kneader is a Banbury mixer.
請求項8に記載の発明は、
対象となる混練バッチについて作成された混練波形と前記基準混練波形に対する許容範囲との比較照合を、ラムの下降開始時点から行うことを特徴とする請求項7に記載のゴム混練機における混練判定方法である。
The invention according to claim 8 provides:
8. The kneading determination method in a rubber kneader according to claim 7, wherein the comparison and comparison between the kneading waveform created for the target kneading batch and the allowable range with respect to the reference kneading waveform is performed from the start of descent of the ram. It is.
請求項9に記載の発明は、
請求項1ないし請求項8のいずれか1項に記載のゴム混練機における混練判定方法を用いて、ゴムの混練りを行うことを特徴とするゴムの混練り方法である。
The invention according to claim 9 is:
A rubber kneading method comprising kneading rubber using the kneading determination method in a rubber kneader according to any one of claims 1 to 8.
本発明によれば、混練バッチの混練りに際して異常バッチの発生を即座に判定して、発生した異常バッチの次工程への流出を防止することができる技術を提供することができる。 ADVANTAGE OF THE INVENTION According to this invention, the technique which can determine immediately the generation | occurrence | production of an abnormal batch at the time of kneading | mixing of a kneading batch, and can prevent the outflow to the next process of the generated abnormal batch can be provided.
以下、本発明の実施の形態に基づいて、本発明を具体的に説明する。 Hereinafter, the present invention will be described in detail based on embodiments of the present invention.
本実施の形態においては、混練バッチの混練波形が基準混練波形に対する許容範囲(トレランス)内にどの程度存在しているかを求め、その結果に応じて、混練バッチが正常であるか異常であるかの判定を行う。 In the present embodiment, it is determined how much the kneading waveform of the kneading batch is within an allowable range (tolerance) with respect to the reference kneading waveform, and depending on the result, whether the kneading batch is normal or abnormal Judgment is made.
即ち、正常な材料を用いて正常な手順に従って正常な混練バッチを製造した場合、電力量、温度と時間との関係を示すチャートは、バッチが異なっても殆んど変化しないが、設備の不良や練り不良、工程異常、原料異常などがあると、このチャートが大きく変化する。 That is, when a normal kneading batch is manufactured according to a normal procedure using normal materials, the chart showing the relationship between the electric energy, temperature and time hardly changes even if the batch is different, but the equipment is defective. If there is a kneading defect, process abnormality, raw material abnormality, etc., this chart changes greatly.
このため、正常な混練バッチにおけるチャートに基づいて基本のチャート(基準混練波形)を予め作成しておき、実際の混練バッチにおけるチャート(混練波形)と比較照合して、その変化を知ることができれば、上記した設備の不良や練り不良、工程異常、原料異常などにより異常な混練バッチが発生していることを知ることができる。 For this reason, if a basic chart (reference kneading waveform) is prepared in advance based on a chart in a normal kneading batch and compared with a chart (kneading waveform) in an actual kneading batch, the change can be known. It is possible to know that an abnormal kneading batch is generated due to the above-mentioned equipment failure, kneading failure, process abnormality, raw material abnormality, or the like.
例えば、原料異常の一例として、水濡れしたカーボンブラック(CB)が使用された混練バッチの場合、ローターに対してゴムがスリップしてトルクが掛からなくなるため、混練波形が大きく変化する。そして、このまま混練りを進めていくと、混練バッチの水分率が高くなり、押出などでこの混練バッチを使用すると、ポーラスが発生したりして不良が発生する恐れがある。このため、上記のように混練波形が基準混練波形から大きく変化したことを検出することにより、異常バッチと判定することができる。 For example, in the case of a kneading batch in which water-wet carbon black (CB) is used as an example of a raw material abnormality, since the rubber slips against the rotor and no torque is applied, the kneading waveform changes greatly. If the kneading is continued as it is, the moisture content of the kneading batch increases, and if this kneading batch is used for extrusion or the like, there is a possibility that a porous material may be generated and a defect may occur. For this reason, it can be determined as an abnormal batch by detecting that the kneading waveform has greatly changed from the reference kneading waveform as described above.
以下、本実施の形態に係る混練判定方法の手順を具体的に説明する。 Hereinafter, the procedure of the kneading determination method according to the present embodiment will be specifically described.
(1)ステップ1(基準混練波形の作成)
まず、基準混練波形(マスターチャート)を予め作成する。基準混練波形は正常な混練バッチの混練りを行い、混練り開始からの経過時間、ローターの電力量、ゴム温度を所定の周期(例えば1秒)でサンプリングすることにより作成された波形データであり、混練バッチの配合毎に作成される。
(1) Step 1 (Creation of reference kneading waveform)
First, a reference kneading waveform (master chart) is created in advance. The reference kneading waveform is waveform data created by kneading a normal kneading batch and sampling the elapsed time from the start of kneading, the power consumption of the rotor, and the rubber temperature at a predetermined period (for example, 1 second). It is created for each kneading batch.
この基準混練波形は、横軸を混練り開始からの経過時間、縦軸を少なくともローターの電力量、ゴム温度として、所定の周期でサンプリングされた各計測値をプロットすることにより作成される。なお、ここで、ローターの電力量、ゴム温度を縦軸としているのは、電力量や温度がバッチの混練り状況を左右する主たるパラメーターであることによる。そして、計測値をサンプリングする所定の周期としては、適宜設定することができるが、1秒であることが好ましい。但し、1秒以下であってもよい。 This reference kneading waveform is created by plotting each measured value sampled at a predetermined cycle, with the horizontal axis as the elapsed time from the start of kneading, the vertical axis as at least the electric power of the rotor, and the rubber temperature. Here, the reason why the electric power of the rotor and the rubber temperature are plotted on the vertical axis is that the electric power and the temperature are the main parameters that influence the kneading state of the batch. The predetermined period for sampling the measurement value can be set as appropriate, but is preferably 1 second. However, it may be 1 second or less.
(2)ステップ2(許容範囲の設定)
次に、上記基準混練波形に基づいて許容範囲(トレランス)を設定する。これは、実際の混練りにおいては、正常な原料、設備、工程で混練りした場合でも、一定の範囲でのバラツキが発生することを避けられないため、その許容範囲を決定するものであり、混練バッチの配合毎に適宜設定される。
(2) Step 2 (Allowable range setting)
Next, an allowable range (tolerance) is set based on the reference kneading waveform. In actual kneading, even when kneaded with normal raw materials, equipment, and processes, it is unavoidable that variations occur within a certain range, so that the allowable range is determined. It is set as appropriate for each kneading batch.
図1は本実施の形態に係るゴム混練機における混練判定方法の基準混練波形1と許容範囲2を説明する図である。図1に示すように、基準混練波形1をセンターとして、上下に、それぞれ所定の幅で許容範囲2が設定される。この許容範囲2は、電力量、温度等の各パラメーターについて、上下それぞれが基準混練波形1の値の0〜30%で適宜設定される。
FIG. 1 is a diagram for explaining a reference kneading waveform 1 and an
(3)ステップ3(基準混練波形および許容範囲の記憶)
次に、上記で設定された基準混練波形と許容範囲を、実際の混練バッチを開始する前に、制御装置に記憶させておく。
(3) Step 3 (storage of reference kneading waveform and allowable range)
Next, the reference kneading waveform and the allowable range set above are stored in the control device before starting the actual kneading batch.
(4)ステップ4(判定基準の設定)
次に、混練バッチの正常異常を判定する基準となる割合Aを設定して、同様に、制御装置に記憶させる。この割合Aは、実際の混練バッチにおいて得られる混練波形が、上記で設定した許容範囲内にどの程度あるかによって正常な混練バッチとのズレを知り、混練バッチの正常、異常を判定する閾値となるものであり、例えば60%に設定される。
(4) Step 4 (Criteria setting)
Next, a ratio A serving as a reference for determining normality / abnormality of the kneading batch is set and stored in the control device in the same manner. This ratio A is a threshold value for determining whether the kneading batch is normal or abnormal by knowing the deviation from the normal kneading batch depending on how much the kneading waveform obtained in the actual kneading batch is within the allowable range set above. For example, it is set to 60%.
(5)ステップ5(混練波形の作成)
次に、判定対象の混練りを開始し、上記した基準混練波形の作成と同様にして、混練波形を作成する。
(5) Step 5 (Create kneading waveform)
Next, kneading to be determined is started, and a kneading waveform is created in the same manner as the above-described creation of the reference kneading waveform.
(6)ステップ6(比較照合)
次に、基準混練波形と混練バッチの混練波形を比較照合する。これにより、混練波形が基準混練波形からどのように変化していることを知ることができるため、混練バッチが正常であるか異常であるかの判定を行うことができる。
(6) Step 6 (Comparison verification)
Next, the reference kneading waveform and the kneading batch kneading waveform are compared and collated. Thereby, since it can be known how the kneading waveform is changed from the reference kneading waveform, it is possible to determine whether the kneading batch is normal or abnormal.
具体的には、混練バッチの混練波形が許容範囲内にある混練波形の部分の全体の波形に対する割合を算出して、次のステップにおいて混練バッチが正常であるか異常であるかの判定を行う。 Specifically, the ratio of the portion of the kneading waveform in which the kneading waveform of the kneading batch is within the allowable range is calculated and the next step determines whether the kneading batch is normal or abnormal. .
なお、混練バッチにおいては材料の投入バラツキがあるため、上記した波形の比較照合は、バンバリーのラムの下降開始時点から行うことが好ましい。 In addition, since there is variation in the material input in the kneading batch, it is preferable to perform the above-described waveform comparison and collation from the start point of the Banbury ram descending.
(7)ステップ7(判定)
次に、ステップ6で算出された割合とステップ4で設定された割合Aとを比較する。そして、算出された割合が割合A以上であれば混練バッチは正常であると判定する。一方、算出された割合が割合A未満であれば混練バッチは異常であると判定する。例えば、上記のように割合Aを60%に設定した場合には、算出された割合が60%以上の場合に正常であると判定し、60%未満の場合に異常と判定する。
(7) Step 7 (determination)
Next, the ratio calculated in step 6 is compared with the ratio A set in step 4. And if the calculated ratio is more than the ratio A, it will determine with a kneading batch being normal. On the other hand, if the calculated ratio is less than the ratio A, it is determined that the kneading batch is abnormal. For example, when the ratio A is set to 60% as described above, it is determined to be normal when the calculated ratio is 60% or more, and is determined to be abnormal when it is less than 60%.
以上の手順により、混練バッチが正常と判定された場合には、混練バッチはそのままアンダーバンバリーから排出されて、既に正常として排出されていた混練バッチと混合される。 When the kneading batch is determined to be normal by the above procedure, the kneading batch is discharged as it is from the under Banbury and mixed with the kneading batch that has already been discharged as normal.
一方、異常と判定された場合には、混練サイクルを停止させ、正常な混練バッチに異常な混練バッチが混合されないようにする。その後、正常な混練バッチをアンダーバンバリーから排出するまでは、上記状態をキープする。 On the other hand, when it is determined as abnormal, the kneading cycle is stopped so that the abnormal kneading batch is not mixed with the normal kneading batch. Thereafter, the above state is kept until a normal kneading batch is discharged from the under banbury.
このように、本実施の形態によれば、混練バッチが完了した時点で混練バッチが正常であるか異常であるかを即座に判定することができるため、発生した異常バッチの次工程への流出を防止することができる。 As described above, according to the present embodiment, it is possible to immediately determine whether the kneading batch is normal or abnormal when the kneading batch is completed. Can be prevented.
なお、上記した本実施の形態に係るゴム混練機における混練判定方法は、通常のベース練りだけでなく、リミル練りや仕上げ練りなど、いずれの練り工程においても適用して、異常バッチを判定することができる。 The above-described kneading determination method in the rubber kneader according to the present embodiment is applied to any kneading process such as remill kneading and finishing kneading as well as normal base kneading to determine an abnormal batch. Can do.
次に、実施例により本発明をより具体的に説明する。 Next, the present invention will be described more specifically with reference to examples.
混練機として、バンバリーミキサー(270L、ローター:4WN)を使用して、タイヤカーカス用のゴム組成物を各20バッチ混練りした。そして、実施例では、本実施の形態に係る混練判定方法を行いながら混練りを行い、比較例では混練り中の判定を行わなかった。なお、実施例においては、許容値の範囲を15%に、割合Aを70%に設定した。 Using a Banbury mixer (270 L, rotor: 4 WN) as a kneader, 20 batches of each rubber composition for tire carcass were kneaded. In the examples, kneading was performed while performing the kneading determination method according to the present embodiment, and in the comparative example, the determination during kneading was not performed. In the example, the allowable range was set to 15%, and the ratio A was set to 70%.
そして、混練りする20バッチの内、1バッチにおいて、水濡れしたカーボンブラック(CB)を使用し、このバッチを不良バッチとして判定できるか否かを調べた。 Then, in 20 batches to be kneaded, in one batch, carbon black (CB) wet with water was used, and it was examined whether or not this batch could be determined as a defective batch.
図2に実施例と比較例における混練波形を示す。図2中の左図は実施例において不良バッチとして判定されるべき混練りバッチの混練波形を、基準混練波形1と合わせて示している。一方、右図は比較例の混練波形であり、20バッチの全てについての混練波形が記載されている。 FIG. 2 shows kneading waveforms in the example and the comparative example. The left diagram in FIG. 2 shows the kneading waveform of the kneaded batch to be determined as a defective batch in the embodiment together with the reference kneading waveform 1. On the other hand, the right figure is a kneading waveform of a comparative example, and kneading waveforms for all 20 batches are described.
図2の左図および右図において、上側の波形が温度、下側の波形が電力を示している。 In the left and right diagrams of FIG. 2, the upper waveform indicates temperature, and the lower waveform indicates power.
図2より、実施例においては、基準混練波形1から大きく外れた混練波形3が1バッチ確認されたため、混練りを停止して確認したところ、上記した水に濡れたカーボンブラックが混入したバッチであったため、このバッチを取り除くことにより不良バッチの数を1バッチに抑えることができた。
As shown in FIG. 2, in the example, one batch of kneading
一方、比較例においては、実施例のように混練り途中で、水に濡れたカーボンブラックが混入したバッチを検出することができず、20バッチ全てを混練りした後の検査によって異常が判明したため全てのバッチが不良バッチとなった。 On the other hand, in the comparative example, it was not possible to detect a batch mixed with carbon black wet with water during the kneading as in the example, and an abnormality was found by inspection after kneading all 20 batches. All batches were bad batches.
以上より、混練波形と予め定められた基準混練波形の許容範囲とを比較照合することにより、混練り中の異常バッチの発生を即座に判定して、他の混練りバッチへ影響を与えることなく、異常バッチの流出を防止できることが確認できた。 From the above, by comparing and collating the kneading waveform with the predetermined allowable range of the reference kneading waveform, it is possible to immediately determine the occurrence of an abnormal batch during kneading without affecting other kneading batches. It was confirmed that the abnormal batch could be prevented from flowing out.
以上、本発明を実施の形態に基づいて説明したが、本発明は上記の実施の形態に限定されるものではない。本発明と同一および均等の範囲内において、上記の実施の形態に対して種々の変更を加えることができる。 While the present invention has been described based on the embodiments, the present invention is not limited to the above embodiments. Various modifications can be made to the above-described embodiments within the same and equivalent scope as the present invention.
1 基準混練波形
2 許容範囲
3 混練バッチの混練波形
1
Claims (9)
正常である混練バッチがゴム混練機において混練りされた際の、少なくとも、電力および温度をパラメーターとして所定の周期でサンプリングして基準混練波形を予め作成すると共に、前記基準混練波形に対する許容範囲を予め決めておき、
その後、対象となる混練バッチについて混練波形を作成し、対象となる混練バッチについて得られた混練波形と、予め作成した前記基準混練波形に対する許容範囲とを比較照合することによって、混練バッチが正常であるか異常であるかの判定を行うことを特徴とするゴム混練機における混練判定方法。 A kneading determination method in a rubber kneader for determining whether a kneading batch kneaded in a rubber kneader is normal or abnormal,
When a normal kneading batch is kneaded in a rubber kneader, a reference kneading waveform is prepared in advance by sampling at a predetermined cycle using at least power and temperature as parameters, and an allowable range for the reference kneading waveform is set in advance. Decide,
Thereafter, a kneading waveform is created for the target kneading batch, and the kneading batch is normal by comparing and collating the kneading waveform obtained for the target kneading batch with the permissible range for the reference kneading waveform created in advance. A kneading determination method in a rubber kneader characterized by determining whether there is an abnormality or not.
前記混練バッチの混練波形が前記基準混練波形に対する許容範囲内である割合が、所定の割合以上である場合に混練バッチが正常であると判定し、前記所定の割合未満である場合に前記混練バッチが異常であると判定することを特徴とする請求項1に記載のゴム混練機における混練判定方法。 In the comparison of the kneading waveform obtained for the target kneading batch and the allowable range for the reference kneading waveform created in advance,
When the proportion of the kneading batch that is within the allowable range with respect to the reference kneading waveform is equal to or greater than a predetermined proportion, the kneading batch is determined to be normal, and when the proportion is less than the predetermined proportion, the kneading batch 2. The kneading determination method in a rubber kneader according to claim 1, wherein the determination is abnormal.
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