JP3992587B2 - Kneading equipment - Google Patents

Kneading equipment Download PDF

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Publication number
JP3992587B2
JP3992587B2 JP2002307762A JP2002307762A JP3992587B2 JP 3992587 B2 JP3992587 B2 JP 3992587B2 JP 2002307762 A JP2002307762 A JP 2002307762A JP 2002307762 A JP2002307762 A JP 2002307762A JP 3992587 B2 JP3992587 B2 JP 3992587B2
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Japan
Prior art keywords
kneading
temperature
measuring device
temperature measuring
tank
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JP2002307762A
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JP2004141733A (en
Inventor
裕之 福田
誠 入江
猛 西村
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Moriyama Co Ltd
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Moriyama Co Ltd
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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
    • B29B7/02—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
    • B29B7/286—Component parts, details or accessories; Auxiliary operations for measuring, controlling or regulating, e.g. viscosity control measuring properties of the mixture, e.g. temperature, density
    • 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
    • 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

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Measuring Temperature Or Quantity Of Heat (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Accessories For Mixers (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)

Description

【０００１】
【発明の属する技術分野】
本発明は、混練装置、特に密閉された混練室内に互いに逆方向に回転する対をなす混練用ロータを備えた混練装置において混練中の材料の温度を測定する温度測定器の改良に関するものである。
【０００２】
【従来の技術】
混練装置における混練中の材料の温度測定は、従来は図５乃至図６に示す如く混練装置５０の互いに逆方向に回転する対をなす混練用ロータＲ，Ｒを回動可能に軸支した混練槽５１の下部中央で、ロータＲ，Ｒに干渉しない箇所で、混練室内に突出した状態で取り付けた温度測定器５２によって行われている。
【０００３】
この温度測定器５２は、ホルダ５２Ａの内端に装備されており、ホルダ５２Ａが混練槽５１から外側に向けて突出された筒状のブラケット５１Ａ内の穴５１Ｂに隙間（エアギャップ）をあけて嵌入され、外端においてネジ５１Ｃ及びロックナット５１Ｄで固定されている。そして温度測定器５２は混練材料の漏出が生じないように槽本体壁面と緊密に嵌合され、例えば、外径１４ｍｍの熱電対からなる。
５３は、混練槽の温度を冷却又は加熱する冷却水又はその他熱媒体を充填せしめるジャケットを示す。
【０００４】
図４は、ゴムポリマーとカーボンの混練時の動力と温度の経時変化を示すもので、Ｐが混練動力曲線を、Ｓは温度測定器５２による測定温度を、Ｒは材料の実測温度を示す。
実測温度ＲＩは、ロータＲ、Ｒを停止せしめ混練槽内部の材料温度を直接測定したものである。
【０００５】
混練動力曲線Ｐは電動機の発生動力を示し、混練の負荷によって変動するもので、動力の変化より練り度合いを把握することができる。
【０００６】
図４より明らかな通り、従来の温度測定器５２の測定温度がＢ℃の時、混練材料の実測温度はＴ℃高いＡ℃となる。
温度測定器５２の測定温度Ｂ℃での実測温度Ａ℃と同一温度Ｃ℃となるのＴＲ秒後（タイムラグＴＲ）である。
【０００７】
【発明が解決しようとする課題】
これら温度差やタイムラグが発生する原因は、温度測定器５２で測定される温度はジャケット５３内の冷却水やその他熱媒体の温度の影響を受ける他、センサーの応答速度が遅く実際の材料温度に追随しないためで、ジャケット５３内に冷却水を通している場合には混練槽内の混練中の材料の実際の温度より低く計測されてしまい、一般に同一材料の混練作業においては実際の材料温度と測定温度の誤差はほぼ一定であり、実際の材料の混練中における温度を一定の遅延時間を加味して推測することはできるが、混練材料が多種多様に変化する時はその温度推測は殆どの場合不可能であるといった問題があった。特にゴムを混練する場合、混練時に生じる発熱で一定温度を超えると材料に焼けが生じてだめ（不良品）になってしまうことがあるから作業者はその材料の混練終了温度の把握に多大な注意力を払う必要があった。
【０００８】
本発明はかかる問題点に鑑み、ジャケット内に通される冷却水やその他熱媒体などの熱が混練槽を伝って温度測定器に伝達されることを防止して混練中における材料温度の測定値に誤差を生じさせることのない混練装置を提供することを目的とする。
【０００９】
【課題を解決するための手段】
上記目的を達成するため、本発明の混練装置は、密閉された混練室内に互いに逆方向に回転する対をなす混練用ロータを備えた混練装置において、上記混練室を形成する槽本体の下部中央部に混練室内に突出した状態に温度測定器を備え、該温度測定器にシース型熱電対を使用し、該シース型熱電対を、その外周面を緊密嵌合状態に保持する樹脂製の中空円筒部材からなる断熱材及び該断熱材の外周面を緊密嵌合状態に保持する円筒形部材からなるアダプタを介して、アダプタのネジからなる固定手段を調整することによって前記シース型熱電対の槽内への突出量を調整可能に、槽本体に取り付けたことを特徴とする。
【００１０】
上記の構成からなる本発明は、温度測定器を槽本体に対して断熱材を介して混練槽内に突出した状態で取り付けるようにしたから、温度測定器による測定温度が槽本体を介して伝達されるジャケット内の温度の影響を受けることがない。
【００１１】
特に、断熱材を樹脂製の中空円筒部材とすることにより、槽本体を伝わってくるジャケット内の温度の温度測定器による測定温度に対する影響を確実に遮断することができる。
【００１２】
また、温度測定器に小径のシース型熱電対を使用することにより、外径が小径で、しかも温度変化に対する応答性が極めて良好な温度測定器とすることができる。
【００１３】
【発明の実施の形態】
以下、本発明の混練装置の実施の形態を図面に基づいて説明する。
【００１４】
尚、従来装置と同様の構造については同一の符号、一連の符号を付し説明を省略する。
【００１５】
図１乃至図２は、本発明の混練装置を示し、この混練装置１は、従来の混練装置と同様、互いに逆方向に回転する対をなす混練用ロータＲ，Ｒを回動可能に軸支した混練槽５１の下部中央で、ロータＲ，Ｒに干渉しない箇所で、混練槽内に突出した状態で温度測定器２を取り付けてなる。
【００１６】
この温度測定器２は、断熱材４と、該断熱材４によって混練槽５１とは直接接触することなく混練槽５１の熱が伝わることのないように配設される小径の熱電対３と、断熱材４に覆われた熱電対３を混練槽５１に取り付けるためのアダプタ５とよりなる。
【００１７】
熱電対３は、内部に絶縁材（マグネシア）を充填した保護管（シース材）の中に熱電対線（エレメント）を１対又は２対以上入れてなる、小径の所謂シース型熱電対３Ａ、３’Ａを用いることが好ましく、シース型熱電対によるときは高温高圧に耐え、温度変化に対する応答が極めて良好である。
【００１８】
断熱材４は、樹脂製の中空円筒部材、特に限定されるものではないが、ピーク材（ポリエーテルエーテルケトン）を使用することが好ましい。
ピーク材は、エンジニアリングプラスチックの中でも高レベルの耐薬品性をもち、耐熱性、耐摩耗性、難燃性、耐加水分解性に優れた材質である。
【００１９】
アダプタ５は、その形状を特に限定されるものではないが、図示の如く温度測定器２の熱電対３を断熱材４を介して保持する円筒形部材が好ましく、混練槽５１に対して、ネジなどの固定手段によって取り付け固定され、かつ混練槽内への突出量が調整可能とされている。アダプタ５を混練槽５１に取り付けた状態ではアダプタ５自体が槽本体の一部分となる。
【００２０】
また、アダプタ５４の外径を従来の混練装置に取り付けた温度測定器の外径と同じ、例えば、従来の温度測定器の外径が１４ｍｍであればこれと同じ１４ｍｍとすることにより、温度測定器２をアダプタ５４ごと取り外して、従来の混練装置の温度測定器と容易に組み換えすることができる。
【００２１】
次に、表１に本件発明の温度測定器２と従来の温度測定器５２を使用した場合の混練槽５１内の混練材料の実際の温度と温度測定器が指示する指示温度を示す。
【００２２】
【表１】

Figure 0003992587
【００２３】
表１には、温度測定器２、５２が表の指示温度を示した時に運転を停止し、混練中の材料の温度を温度計により数カ所直接測っって得た温度を示す。
【００２４】
表１の実験においては、ジャケット５２内に混練材料を冷却するための冷却水を流通させている場合で、従来例においてはその温度測定器５２によって計測される温度は実際の温度よりも１０％以上低く測定されるのに比して、本件発明における温度測定器２では実測温度のほぼ平均値を指示した。
【００２５】
以上、本発明の混練装置について、その実施例に基づいて説明したが、本発明は上記実施例に記載した構成に限定されるものではなく、その趣旨を逸脱しない範囲において適宜その構成を変更することができるものである。
【００２６】
【発明の効果】
以上の如く本発明によるときは、従来の混練装置の測定温度と比べて極めて正確な測定を可能とし、混練作業中の材料の混練状態を的確に把握することができ、アダプタのサイズを従来の温度測定器の外径に合わせることにより、従来品の改造を容易に行うことができる。
特に、断熱材を樹脂製の中空円筒部材とすることにより、その断熱性は高く、槽本体を伝わってくるジャケット内の温度の温度測定器での測定温度に対する影響を確実に遮断することができる。
また、温度測定器に小径のシース型熱電対を使用する時は応答速度が速くより正確な温度測定が可能であるとともに、機器の低コスト化を図ることもできる。
【図面の簡単な説明】
【図１】 本発明の混練装置を示す一部断面正面図である。
【図２】 本発明の混練装置における温度測定器部分の拡大断面図である。
【図３】 混練装置における温度測定器部分の参考例を示す拡大断面図である。
【図４】 ゴムポリマーとカーボンの混練時の動力・温度の経時変化を示す図である。
【図５】 従来の混練装置を示す一部断面正面図である。
【図６】 従来の混練装置における温度測定器部分の拡大断面図である。
【符号の説明】
１ 混練装置
２ 温度測定器
３ 熱電対
４ 断熱材
５１ 混練槽[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an improvement in a kneading apparatus, particularly a temperature measuring instrument for measuring the temperature of a material being kneaded in a kneading apparatus provided with a kneading rotor that rotates in opposite directions in a sealed kneading chamber. .
[0002]
[Prior art]
Conventionally, the temperature of the material during kneading in the kneading apparatus is measured by kneading the kneading rotors R and R, which are paired to rotate in opposite directions of the kneading apparatus 50, as shown in FIGS. It is carried out by a temperature measuring device 52 attached in a state where it protrudes into the kneading chamber at a position where it does not interfere with the rotors R, R, in the lower center of the tank 51.
[0003]
The temperature measuring device 52 is provided at the inner end of the holder 52A, and a gap (air gap) is formed in a hole 51B in a cylindrical bracket 51A in which the holder 52A protrudes outward from the kneading tank 51. It is inserted and fixed at the outer end with a screw 51C and a lock nut 51D. The temperature measuring device 52 is closely fitted with the wall surface of the tank body so that the kneaded material does not leak, and is made of, for example, a thermocouple having an outer diameter of 14 mm.
53 indicates a jacket filled with cooling water or other heat medium for cooling or heating the temperature of the kneading tank.
[0004]
FIG. 4 shows the time-dependent changes in power and temperature during kneading of the rubber polymer and carbon. P indicates the kneading power curve, S indicates the temperature measured by the temperature measuring device 52, and R indicates the actual temperature of the material.
The measured temperature RI is obtained by directly measuring the material temperature inside the kneading tank with the rotors R and R stopped.
[0005]
The kneading power curve P indicates the power generated by the electric motor and fluctuates depending on the kneading load. The kneading degree can be grasped from the change in power.
[0006]
As is apparent from FIG. 4, when the measurement temperature of the conventional temperature measuring device 52 is B ° C., the actual measurement temperature of the kneaded material is A ° C., which is higher by T ° C.
This is TR seconds (time lag TR) after the temperature measuring device 52 reaches the same temperature C ° C. as the measured temperature A ° C. at the measured temperature B ° C.
[0007]
[Problems to be solved by the invention]
The cause of these temperature differences and time lags is that the temperature measured by the temperature measuring device 52 is affected by the temperature of the cooling water and other heat medium in the jacket 53, and the sensor response speed is slow and the actual material temperature. Since it does not follow, when cooling water is passed through the jacket 53, the temperature is measured lower than the actual temperature of the material being kneaded in the kneading tank. Generally, in the kneading operation of the same material, the actual material temperature and the measured temperature are measured. The error during the mixing of the material can be estimated by taking into account a certain delay time, but when the kneaded material changes in various ways, the temperature estimation is almost impossible. There was a problem that it was possible. In particular, when kneading rubber, if the heat generated during kneading exceeds a certain temperature, the material may be burned and become waste (defective product). It was necessary to pay attention.
[0008]
In view of such problems, the present invention prevents the heat of cooling water or other heat medium passed through the jacket from being transmitted to the temperature measuring device through the kneading tank, and the measured value of the material temperature during kneading. It is an object of the present invention to provide a kneading apparatus that does not cause an error.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, the kneading apparatus of the present invention is a kneading apparatus provided with a kneading rotor that makes a pair rotating in opposite directions in a closed kneading chamber. A temperature measuring device is provided in a state protruding into the kneading chamber, and a sheath type thermocouple is used for the temperature measuring device , and the sheath type thermocouple is made of a resin-made hollow that holds its outer peripheral surface in a tightly fitted state The sheath-type thermocouple tank is adjusted by adjusting fixing means consisting of adapter screws through a heat insulating material made of a cylindrical member and an adapter made of a cylindrical member that holds the outer peripheral surface of the heat insulating material in a tightly fitted state. It is characterized by being attached to the tank body so that the amount of protrusion to the inside can be adjusted .
[0010]
In the present invention configured as described above, the temperature measuring device is attached to the tank body in a state of protruding into the kneading tank via the heat insulating material, so that the temperature measured by the temperature measuring device is transmitted via the tank body. It is not affected by the temperature inside the jacket.
[0011]
In particular, by using a resin-made hollow cylindrical member as the heat insulating material, it is possible to reliably block the influence of the temperature in the jacket transmitted through the tank body on the temperature measured by the temperature measuring device.
[0012]
Further, by using a small-diameter sheathed thermocouple for the temperature measuring device, it is possible to obtain a temperature measuring device that has a small outer diameter and extremely excellent response to temperature changes.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the kneading apparatus of the present invention will be described with reference to the drawings.
[0014]
In addition, about the structure similar to a conventional apparatus, the same code | symbol and a series of code | symbol are attached | subjected, and description is abbreviate | omitted.
[0015]
1 and 2 show a kneading apparatus of the present invention. This kneading apparatus 1 is pivotally supported so that kneading rotors R, R that make pairs that rotate in opposite directions can rotate. In the lower center of the kneading tank 51, the temperature measuring device 2 is attached in a state where it does not interfere with the rotors R and R and protrudes into the kneading tank.
[0016]
The temperature measuring device 2 includes a heat insulating material 4 and a small-diameter thermocouple 3 disposed so that the heat of the kneading tank 51 is not directly transferred to the kneading tank 51 by the heat insulating material 4; It consists of an adapter 5 for attaching the thermocouple 3 covered with the heat insulating material 4 to the kneading tank 51.
[0017]
The thermocouple 3 has a small diameter so-called sheathed thermocouple 3A, in which one or more pairs of thermocouple wires (elements) are placed in a protective tube (sheath material) filled with an insulating material (magnesia). It is preferable to use 3′A, and when a sheath type thermocouple is used, it can withstand high temperature and pressure and has a very good response to temperature changes.
[0018]
The heat insulating material 4 is not particularly limited, but is preferably a peak material (polyether ether ketone).
The peak material has a high level of chemical resistance among engineering plastics and is excellent in heat resistance, wear resistance, flame resistance, and hydrolysis resistance.
[0019]
The shape of the adapter 5 is not particularly limited, but is preferably a cylindrical member that holds the thermocouple 3 of the temperature measuring device 2 via the heat insulating material 4 as shown in the figure. The amount of projection into the kneading tank can be adjusted. In a state where the adapter 5 is attached to the kneading tank 51, the adapter 5 itself becomes a part of the tank body.
[0020]
Further, the outer diameter of the adapter 54 is the same as the outer diameter of the temperature measuring device attached to the conventional kneading apparatus. For example, if the outer diameter of the conventional temperature measuring device is 14 mm, the same is set to 14 mm. The apparatus 2 can be removed together with the adapter 54 and easily recombined with a temperature measuring device of a conventional kneading apparatus.
[0021]
Next, Table 1 shows the actual temperature of the kneaded material in the kneading tank 51 and the indicated temperature indicated by the temperature measuring device when the temperature measuring device 2 of the present invention and the conventional temperature measuring device 52 are used.
[0022]
[Table 1]
Figure 0003992587
[0023]
Table 1 shows the temperatures obtained by directly measuring the temperature of the material being kneaded at several points with a thermometer when the temperature measuring devices 2 and 52 indicate the indicated temperatures in the table.
[0024]
In the experiment of Table 1, the cooling water for cooling the kneaded material is circulated in the jacket 52. In the conventional example, the temperature measured by the temperature measuring device 52 is 10% of the actual temperature. Compared to the above measurement, the temperature measuring device 2 according to the present invention indicated an almost average value of the actually measured temperatures.
[0025]
As mentioned above, although the kneading apparatus of the present invention has been described based on the embodiments thereof, the present invention is not limited to the configurations described in the above embodiments, and the configurations are appropriately changed without departing from the gist thereof. It is something that can be done.
[0026]
【The invention's effect】
As described above, according to the present invention, extremely accurate measurement is possible compared to the measurement temperature of the conventional kneading apparatus, the kneading state of the material during the kneading operation can be accurately grasped, and the size of the adapter can be reduced. By adapting to the outer diameter of the temperature measuring device, the conventional product can be easily modified.
In particular, by using a resin-made hollow cylindrical member as the heat insulating material, the heat insulating property is high, and the influence of the temperature inside the jacket transmitted through the tank body on the temperature measured by the temperature measuring device can be surely cut off. .
In addition, when a small-diameter sheathed thermocouple is used for the temperature measuring device, the response speed is fast and more accurate temperature measurement is possible, and the cost of the device can be reduced.
[Brief description of the drawings]
FIG. 1 is a partially sectional front view showing a kneading apparatus of the present invention.
FIG. 2 is an enlarged cross-sectional view of a temperature measuring portion in the kneading apparatus of the present invention.
FIG. 3 is an enlarged cross-sectional view showing a reference example of a temperature measuring device portion in the kneading apparatus .
FIG. 4 is a graph showing changes over time in power and temperature during kneading of a rubber polymer and carbon.
FIG. 5 is a partially sectional front view showing a conventional kneading apparatus.
FIG. 6 is an enlarged cross-sectional view of a temperature measuring portion in a conventional kneading apparatus.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Kneading apparatus 2 Temperature measuring device 3 Thermocouple 4 Heat insulation material 51 Kneading tank

Claims (1)

密閉された混練室内に互いに逆方向に回転する対をなす混練用ロータを備えた混練装置において、上記混練室を形成する槽本体の下部中央部に混練室内に突出した状態に温度測定器を備え、該温度測定器にシース型熱電対を使用し、該シース型熱電対を、その外周面を緊密嵌合状態に保持する樹脂製の中空円筒部材からなる断熱材及び該断熱材の外周面を緊密嵌合状態に保持する円筒形部材からなるアダプタを介して、アダプタのネジからなる固定手段を調整することによって前記シース型熱電対の槽内への突出量を調整可能に、槽本体に取り付けたことを特徴とする混練装置。In a kneading apparatus having a pair of kneading rotors rotating in opposite directions in a sealed kneading chamber, a temperature measuring device is provided in a state of protruding into the kneading chamber at the lower central portion of the tank body forming the kneading chamber. A sheath-type thermocouple is used for the temperature measuring device , and the sheath-type thermocouple includes a heat insulating material made of a resin hollow cylindrical member that holds its outer peripheral surface in a close fitting state, and an outer peripheral surface of the heat insulating material. It is attached to the tank body so that the amount of protrusion of the sheath type thermocouple into the tank can be adjusted by adjusting the fixing means consisting of the adapter screw through the adapter consisting of a cylindrical member that is held in a tight fitting state. A kneading apparatus characterized by that.
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JP4807664B2 (en) * 2006-06-01 2011-11-02 Ｎｏｋ株式会社 Kneading machine
JP5420487B2 (en) * 2010-07-12 2014-02-19 鈴鹿エンヂニヤリング株式会社 Thermocouple temperature detector for high viscosity materials
JP5795568B2 (en) * 2012-12-17 2015-10-14 鈴鹿エンヂニヤリング株式会社 Mounting structure of thermocouple temperature detector for kneading machine for high viscosity kneading materials
CN104493993A (en) * 2015-01-02 2015-04-08 江苏新瑞峰信息科技有限公司 Rubber internal mixer for automobile tyre
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US20220326093A1 (en) 2019-06-05 2022-10-13 Compagnie Generale Des Etablissements Michelin Temperature sensor for use in rubber mixers
DE102021106539B4 (en) 2021-03-17 2023-01-19 Harburg-Freudenberger Maschinenbau Gmbh Temperature sensor, device with temperature sensor and use of the temperature sensor in a mixing device

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