JPS5817825A - Continuous sand mill - Google Patents

Abstract

PURPOSE:To elevate a compression shearing effect, and to mix a pulverulent body with a addition of a small quantity uniformly, by improving a shape of a mixing rotor to a specific different shape or the same shape, in a double spindle continuous sand mill. CONSTITUTION:In a trough 5 in a double spindle continuous sand mill, 2 blades are installed one rotary spindle 6, each blade constitutes a mixing rotor 4 having a shape whose front edge 7 in the rotating direction bulges larger than the rear edge 8 in the rotating direction against a center line 40, and to the other rotary spindle 6, a ring-like spacer 9 is installed. The front edge 7 in the rotating direction has a constant curvature, and a crotch angle of both its tangential line and a tangential line of the trough 5 in its opposed position is constant and small, therefore, since a compression shearing action is mainly executed, a pulverulent body and a addition of a small quantity are mixed in a satisfactory satae. Or, as for the rotor installed to both the rotary spindles 6, a rotor of the same shape, whose both crotch angles are small can be used.

Description

【発明の詳細な説明】 この発明は連続式混線機の改良に関するものである。[Detailed description of the invention] This invention relates to an improvement of a continuous crosstalk machine.

従来、ゴムやプラスチック材料等の混練を行なうための
各種の連続式混線機が用いられているが、従来の混練機
はロータと混練室の壁との間に形成される空間の形状が
ロータの回転によって変化することを利用して混線を行
なうようにしている０このような混練室の形状の変化を
利用して行なう混線は材料の混合、分散に適し、ゴム、
プラスチック、食品等の粘性物質の混線にはよいが、カ
ーボンと微量のテフロンとの混線のばあいのように粉体
と極小量の添加物の混線においては流動性が大きく、充
分な混線は期待できない０ この発明はこのような従来の欠点の解決のためになされ
たものであり、ロータの形状を改良することによって圧
縮せ々断効果を高め、これによって粉体と微量添加物と
の混合が良好に行なわれるようにしたものである。Conventionally, various continuous mixers have been used to knead rubber and plastic materials, etc., but in conventional kneaders, the shape of the space formed between the rotor and the wall of the kneading chamber is similar to that of the rotor. Mixing is performed by taking advantage of changes in the shape of the kneading chamber due to rotation. This method of mixing, which takes advantage of changes in the shape of the mixing chamber, is suitable for mixing and dispersing materials, and is suitable for mixing and dispersing materials.
It is good for cross-talk between viscous substances such as plastics and foods, but it is highly fluid and cannot be expected to sufficiently cross-wire when mixing powder and a very small amount of additives, such as when mixing carbon and a small amount of Teflon. 0 This invention was made to solve these conventional drawbacks, and improves the compression shearing effect by improving the shape of the rotor, thereby improving the mixing of powder and trace additives. It was designed to be carried out in

以下、この発明の実施例を図面によって説明する。第１
図において、１はモータ、２は歯車減速機、６は送りス
クリュー、４は混練部のロータ、５はトラフである。ロ
ータ４は、第２図に示すように、回転軸６に取付けた二
翼で構成され、かつ各翼は中心線４０に対して回転方向
前方の縁７が回転方向後方の縁８より大きく膨出するよ
うに形成されている。また他方の回転軸６には円環状の
スペーサ９を取付けている。Embodiments of the present invention will be described below with reference to the drawings. 1st
In the figure, 1 is a motor, 2 is a gear reducer, 6 is a feed screw, 4 is a rotor of the kneading section, and 5 is a trough. As shown in FIG. 2, the rotor 4 is composed of two blades attached to a rotating shaft 6, and each blade has an edge 7 at the front in the rotational direction with respect to the center line 40 that expands more than an edge 8 at the rear in the rotational direction. It is designed to come out. Further, an annular spacer 9 is attached to the other rotating shaft 6.

回転方向前方の縁７は一定の曲率を有し、この接線とそ
れに対向する位置のトラフ５の接線とのなす角が材料の
噛込角となる。すなわち、第６図に示すように縁Ｚ上の
点りとトラフ５上の点Ｃと接線のなす角θが噛込角θと
なり、 となる。縁７は一定の曲率を有するためにこの噛込角θ
は一定である。また縁７は中心線４０より大きく膨出し
ているために噛込角は小さくなっている。従来は第７図
に示すようにロータ４１は中心線４０からの膨出量が小
さく、従って噛込角は大きかった。The front edge 7 in the rotational direction has a constant curvature, and the angle between this tangent and the tangent of the trough 5 at the opposite position is the bite angle of the material. That is, as shown in FIG. 6, the angle θ formed by a point on the edge Z, a point C on the trough 5, and a tangent line is the bite angle θ, and the following equation is obtained. Since the edge 7 has a constant curvature, this biting angle θ
is constant. Further, since the edge 7 is bulged out more than the center line 40, the engagement angle is small. Conventionally, as shown in FIG. 7, the amount of protrusion of the rotor 41 from the center line 40 was small, and therefore the angle of engagement was large.

従来の形状のロータでは一対のロータ４１．４１とトラ
フ５との間に形成される混練室がロータ４１の回転によ
って変化することにより混線を行なっていたために、混
合、分散は良好番こ行なわれるが、圧縮せん新作用はほ
とんどなかった。これに対して上記第２図のロータ４て
は噛込角が一定で小さいために圧縮せん新作用が主に行
なわれる。In the conventional rotor configuration, the mixing chamber formed between the pair of rotors 41 and 41 and the trough 5 changes with the rotation of the rotor 41, causing crosstalk, so mixing and dispersion are performed well. However, there was almost no new effect on compression. On the other hand, in the rotor 4 shown in FIG. 2, the angle of engagement is constant and small, so that the compression shearing action is mainly performed.

そしてこの圧縮せん新作用が行なわれることによっては
じめて粉体と微量の添加物との良好な混練がなされる。The powder and a small amount of additives are properly kneaded only when this compression-swelling action is performed.

圧縮せん新作用は噛込角が小さくなる程増大するが、噛
込角を小さくするには縁７を大きく膨出させなければな
らず、膨出量が大きくなると混練室の容積が小さくなっ
て材料の滞留時間が短かくなって混練が不充分となるお
それがある。そこで回転方向後方の縁８の膨出量はでき
るだけ小さくしている。カーボンにごく少量のテフロン
を添加した材料の混練を行なったところ、噛込角θと混
練度すなわち製品の品質との関係は第４図に示すように
なった。すなわち、第７図に示す従来装置では品質限界
線６０よりはるかに下の点２０であったが、上記第２図
に示すロータで噛込角θが１７°のものを用いると点１
０に示すように良好な製品が得られた。同図より噛込角
θを２５′以ドにすれば良好な混練が行なわれることが
わか゛る。The compression shearing effect increases as the biting angle becomes smaller, but in order to reduce the biting angle, the edge 7 must be bulged greatly, and as the amount of bulge increases, the volume of the kneading chamber becomes smaller. There is a risk that the residence time of the materials will be shortened, resulting in insufficient kneading. Therefore, the amount of bulge of the rear edge 8 in the rotational direction is made as small as possible. When a material consisting of carbon and a very small amount of Teflon was kneaded, the relationship between the biting angle θ and the degree of kneading, that is, the quality of the product, was as shown in FIG. That is, in the conventional device shown in FIG. 7, the point was 20, which is far below the quality limit line 60, but when the rotor shown in FIG.
A good product was obtained as shown in 0. It can be seen from the figure that good kneading can be achieved if the biting angle θ is set to 25' or less.

第２図の構成ではスペーサ９側の混練室には原ネ゛１が
滞留することになり、これによって原料の素通りを防止
する堰の作用を果すことになる。In the configuration shown in FIG. 2, the raw material 1 stays in the kneading chamber on the side of the spacer 9, which acts as a weir to prevent the raw material from passing through.

第５図は１翼型ロータ４４を両方に適用した例を示し、
各ロータ４４は回転方向前方の縁７は小さな噛込角とな
るように構成している。この構成ではロータ４４の移動
空間が大きいために材料が流れやす＜、撹拌効果も大き
くなるという利点がある。FIG. 5 shows an example in which a single-blade rotor 44 is applied to both,
Each rotor 44 is configured such that the front edge 7 in the rotational direction has a small bite angle. This configuration has the advantage that since the moving space of the rotor 44 is large, the material flows easily and the stirring effect is also increased.

第６図は２翼型ロータ４５，４６を一対用いた例を示し
、各ロータの形状は基本的には上記各ロータと同じであ
る。このロータのばあい、ロータ相互のクリーニング作
用が果されるように一方のロータ４６の外径を多少小さ
く設定し、ロータが干渉しないようにしている。外径が
小さい方のロータ４６とトラフ５との間のクリーニング
作用はないが、このクリーニング作用を生じさせるため
にトラフ５の内径を小さくしてもよい。FIG. 6 shows an example using a pair of two-blade rotors 45 and 46, and the shape of each rotor is basically the same as each rotor described above. In the case of this rotor, the outer diameter of one rotor 46 is set to be somewhat small so that the rotors can perform a mutual cleaning action, and the rotors do not interfere with each other. Although there is no cleaning action between the rotor 46 and the trough 5, which have a smaller outer diameter, the inner diameter of the trough 5 may be made smaller in order to produce this cleaning action.

上記第２図、第５図、第６図のロータ・のうちいずれを
採用してもよいが、これらを組合わせて採用することも
できる。例えば第１図において混線部に入口側から、第
２図のロータ４、第５図のロータ４４および第６図のロ
ータ４５，４６を順次配置するなどして材料に応じて最
も適切な配置とすればよい。Any of the rotors shown in FIGS. 2, 5, and 6 may be used, but a combination of these may also be used. For example, in FIG. 1, the rotor 4 in FIG. 2, the rotor 44 in FIG. 5, and the rotors 45 and 46 in FIG. do it.

以上説明したように、この発明は圧縮せん断効果が充分
に発揮されるようにロータを構成したものであり、粉体
に微量の添加物を混入させた材料の混線にすぐれた効果
を発揮するものである０As explained above, the rotor of this invention is configured so that the compressive shear effect is fully exerted, and it exhibits an excellent effect on the crosstalk of materials in which a small amount of additives are mixed into powder. is 0

【図面の簡単な説明】[Brief explanation of the drawing]

第１図はこの発明の実施例を示す装置の縦断面図、第２
図はその■−ロ線断面図、第６図はロータ噛込角の説明
図、第４図は噛込角と製品品質との関係図、第５，６図
はそれぞれ他の実施例を示す第２図相当図、第７図は従
来のロータの第２図相当図である。 ４．４４，４５，４６・・・ロータ、５・・・トラフ、
７・・・回転方向前方の縁、θ・・・噛込角。 床３図 おｏｄ’ 〇−タ呟込崗θ ）５図 第　　６１シFig. 1 is a vertical sectional view of a device showing an embodiment of the present invention;
The figure is a sectional view taken along the line ■--B, Figure 6 is an explanatory diagram of the rotor bite angle, Figure 4 is a diagram showing the relationship between the bite angle and product quality, and Figures 5 and 6 each show other examples. FIG. 2 is a diagram corresponding to FIG. 2, and FIG. 7 is a diagram corresponding to FIG. 2 of a conventional rotor. 4. 44, 45, 46... rotor, 5... trough,
7... Front edge in the direction of rotation, θ... Engagement angle. Floor figure 3 Ood' 〇-tazukomogangθ) Figure 5 No. 61

Claims (1)

【特許請求の範囲】 １、　二軸連続混練機に於ける混練ロータの混練部にお
いて、少なくとも一方のロータを横断面形状で回転方向
前方側が回転方向後方側よりも中心線から大きく膨出す
るようにかつ噛込角が一定になるように形成したことを
特徴とする連続式混線機。 ２、特許請求の範囲第１項において、他方のロータを回
転軸から周方向に均等に突出するスペーサて構成したこ
とを特徴とする連続式混練機。 ろ、特許請求の範囲第１項において、他方のロータを上
記一方のロータと同様の形状にしたことを特徴とする連
続式混練機。[Claims] 1. In the kneading section of the kneading rotor in the two-screw continuous kneading machine, at least one rotor has a cross-sectional shape such that the front side in the rotation direction bulges out more from the center line than the rear side in the rotation direction. A continuous crosstalk machine characterized by being formed so that the angle of engagement is constant. 2. A continuous kneading machine according to claim 1, characterized in that the other rotor is constituted by a spacer that projects evenly in the circumferential direction from the rotating shaft. 2. The continuous kneading machine according to claim 1, wherein the other rotor has the same shape as the one rotor.