JP3166360U - Planetary mixer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten a processing time and enable satisfactorily stirring and kneading in a manufacturing process of various products such as ink, paint, ceramics, chemicals, foods, electronic materials and the like without causing an adhesion residue on the inner surface of a tank. Provides a Lee mixer. SOLUTION: A plurality of frame-type torsional stirring blades 3 for planetary motion are provided in a tank 2 in which the rotation directions of revolution and rotation are reversed. The plane one-sided cross section of the stirring blade is formed to have a substantially hexagonal cross section, the width d of the plane one-sided cross section is formed to have a width of 0.15 to 0.25 with respect to the diameter D of the stirring blade, and the width b of the edge portion. Is 6 to 12% of the thickness W of the one-sided cross section of the stirring blade, and the thickness W of the stirring blade is formed to have a thickness of 0.2 to 0.05 with respect to the diameter D of the stirring blade. The sandwiching angle between the inclined sides of the cross section of the stirring blade is 85 to 90 ?, and the front angle and the rear angle with respect to the inner surface of the tank are 40 to 50 ?. [Selection diagram] Fig. 4

Description

  The present invention disperses, stirs, kneads, and disperses materials from low to high viscosity (up to 3000 Pa · s) or semi-solid materials such as inks, paints, ceramics, chemicals, foods, electronic materials and other industrial materials. More particularly, the present invention relates to a planetary mixer in which stirring blades are revolved and rotated in a stirring tank (tank) for processing.

  As a kneading type disperser / kneader, conventionally, it has three stirring blades that revolve and rotate in a tank (planetary motion), and the rotational direction of this revolution and rotation is reversed, and the processing material has a strong shearing force. A planetary mixer that can be dispersed, stirred, kneaded, kneaded, etc. is widely used (see, for example, Patent Document 1). However, since the conventional planetary mixer is processed mainly by the shearing force, it may not be processed in a satisfactory state. For example, a mixed powder in which large particles and small particles are mixed easily causes aggregation, which may cause a problem in terms of power. Furthermore, it is well known that sufficient kneading (hard kneading) is insufficient, processing time is required, and an undispersed layer remains on the inner wall surface and bottom of the tank.

JP 2006-192385 A (paragraph 0011, FIG. 2)

  The problem to be solved by the present invention is that when the above-mentioned dispersion, stirring, kneading, etc. are performed, high viscosity or semi-solid kneading (kneading) is performed so that there is no residue on the inner wall surface or bottom surface of the tank. It is an object of the present invention to provide a planetary mixer that can be kneaded, can be pulverized to agglomerated particles of powder and granules, and can further reduce the kneading and kneading time.

  In order to solve the above problems, a planetary mixer having a frame-type stirring blade whose revolving and rotating directions are reversed in a conventional tank was examined. In the conventional stirring blade, the processing material moved in the tangential direction. Some of the amount was small and the kneading effect was insufficient. Conventionally used as a frame-type stirring blade for a planetary mixer is a straight frame-type stirring blade with both ends connected by straight vertical sides and the angle between the upper side and the lower side is 0 degrees, or the upper side and the lower side. A frame-type twisted stirring blade having a shape in which the vertical side portion is twisted in the circumferential direction so that the portion is shifted by 45 degrees or 90 degrees in the circumferential direction is known. The cross-sectional shape of the vertical side part is as follows: a side extending in parallel outward from both sides of the base side, an inclined side extending inclined from the tip of the side, and an edge side connecting the tip of the inclined side It is often formed in a substantially cross-sectional hexagon having The width d from the base side to the edge side of the vertical side portion (the width of the plane piece cross section) d is set to a relatively narrow width of 0.09 to 0,144 with respect to the diameter D of the frame type stirring blade. Therefore, it has been found that the amount of movement of the processing material is reduced. On the other hand, when the ratio of the width d to the diameter D is 0.25 or more, particularly 0.3 or more, the amount of movement of the material in the tangential direction increases, and the phenomenon of rotation occurs, and the stirring and kneading action is reliably performed. It was difficult and the processing time tended to increase.

  Therefore, according to the present invention, there are a plurality of frame type stirring blades having a diameter D in which both ends of the upper side portion and the lower side portion communicating with the drive shaft are connected by the vertical side portions, and the frame type stirring blades are provided in the stirring tank (tank). In the planetary mixer in which the rotating direction of revolution and rotation is reversed and the planetary motion is performed to stir and knead the processing material, the frame type stirring blade is a frame type twist whose vertical side is twisted in the circumferential direction. It is a stirring blade, and the cross-sectional shape of the vertical side portion connects a side edge extending in parallel outward from both sides of the base side, an inclined side extending inclined from the tip of the side edge, and a tip of the inclined side. It has a substantially hexagonal cross section having an edge side, and a width d from the base side of the vertical side portion to the edge side (width of a plane piece cross section) is 0.15 to 0.25 with respect to the diameter D of the stirring blade. A planetary mixer characterized in that it is formed in a width is provided to solve the above problems. It is possible.

  Furthermore, if the planar one-side cross-sectional shape that is the vertical side portion of the stirring blade is not the substantially cross-sectional hexagon as described above, but the cross-sectional square shape as shown in FIG. The effect of feeding the material between the tank and the tank surface is not expected. And in order to improve the biting of the material, it is necessary to increase the clearance between the stirring blade and the inner surface of the tank, but if so configured, the shearing force (slipping) action becomes insufficient, resulting in the kneading effect. Decreases.

  Further, in the planetary mixer having a stirring blade having a substantially hexagonal cross section, the width b of the edge side of the frame-type stirring blade closest to the inner surface of the stirring tank (tank) is set to the thickness of the base (the stirring blade). When the thickness is 4% or less of W, when the edge side is closest to the inner surface of the stirring tank (tank), it becomes a state close to line contact, and almost no compression / expansion effect in the material flow direction is observed. A homogeneous kneading takes time and is not preferable. On the other hand, when the width b is 16% or more, the area close to the tank inner surface increases and the shearing force (slip) stress increases, but the energy of heat generation and load power increases and kneading is not preferable.

  Therefore, according to the present invention, in the planetary mixer, the width b of the edge side of the frame-type twisted stirring blade closest to the inner surface of the stirring tank (tank) is set to the thickness of the base side according to the mechanical capacity ( The planetary mixer having a thickness of 6 to 12% of the thickness (W) of the stirring blade is provided, and the above-mentioned problems are solved. With this configuration, the material bites between the edge portion and the tank inner surface, the kneading time can be shortened, and the material density is improved due to defoaming due to the compression effect.

  Furthermore, the front angle (material biting angle) and rear angle (negative pressure angle) of the inclined side and the included angle (edge angle) θ between the inclined sides are also a problem. If the edge angle θ is less than 80 °, the processing material is used. The shearing force (displacement) generated between the tank wall surface and the tank wall surface is reduced. Further, when the angle is 100 ° or more, the biting of the processing material between the tank wall surfaces becomes less, so that the kneading / dilution time becomes longer, which is not preferable.

  Therefore, according to the present invention, in the planetary mixer, the forward angle (material biting angle) and the backward angle (negative pressure) of the inclined side and the tank inner surface forming the edge part of the vertical side part (plane one side cross section) of the stirring blade. The above planetary mixer is provided in which the angle) is set to 40 to 50 °, and at the same time, the included angle (edge angle) θ between the inclined sides is set to 85 to 90 °. When the edge angle is set to such an angle, the processing material is efficiently swallowed between the edge side and the tank inner surface, and the compression and expansion are effectively repeated in the flow direction of the material, so that the processing can be performed in a short time. .

  Conventionally, in the case of a highly viscous material or a dilatant material, contact between the stirring blades and contact between the stirring blade and the inner wall of the stirring tank (tank) are observed during the stirring and kneading treatment. It is made of a hazardous material treatment material containing an organic solvent and the like, and the stirring blade is also formed in a structure with increased strength. For example, a structure in which the vertical side portions on the upper side portion and the lower side portion side are tapered to increase rigidity, or the cross-sectional shape is changed to prevent contact is also known. Conventionally, in such a case, the thickness of the base (the thickness of the stirring blade) W is 0.12 ± 0.03 (0.117 to 0.123) with respect to the diameter D of the stirring blade. However, contact between the stirring blades and contact between the stirring blades and the inner wall of the stirring tank (tank) are still observed.

  Corresponding to such a case, according to the present invention, in the planetary mixer, the thickness (base thickness) W of the stirring blade is 0.2 ± 0.05 relative to the diameter D of the stirring blade. The planetary mixer having a thickness of 5 mm is provided to solve the above-mentioned problems.

  The present invention is configured as described above, and the width of one side cross-section of the frame-type twisted stirring blade, that is, the width d from the base side to the edge side of the vertical side portion is 0.15 to 0. 5 with respect to the diameter D of the stirring blade. Since the width of the material is 25, it is possible to increase the moving amount of the processing material in the tangential direction without causing a rotation phenomenon, and the material is pushed between the tank wall to be compressed and between the stirring blades in the center of the tank. Due to the resulting compression action, it was possible to effectively carry out the kneading and kneading of strong buckwheat flour, and the time could be shortened to about 1/2 or less compared to the conventional processing time.

  Further, the planetary mixer of the present invention is configured as described above, and the width b of the edge side of the frame-type twisted stirring blade closest to the inner surface of the stirring tank (tank) is determined by the mechanical capacity. Since 6 to 12% of W was used, the material was able to penetrate between the tank inner surfaces, the kneading time could be shortened, and the material density was improved due to defoaming due to the compression effect.

  Further, in the planetary mixer, since the stirring tank (tank) is circular, when the forward angle and the backward angle of the inclined side of the stirring blade are 45 ° and the edge angle θ is 85 to 90 °, the rotor The trajectory when the rotation ratio of the (rotary box) and the rotation speed of the stirring blade was about 1: 3 was able to produce a successful kneading kneading that kneaded strong buckwheat flour. According to the present invention, by setting the cross-sectional shape of the frame-type twisted stirring blade as described above, the solid / liquid processing material is kneaded (kneaded) in a high-viscosity or semi-solid state, and in front of the stirring blade. By compression / expansion at an angle (material biting angle) and backward angle (negative pressure), powder and granules can be surface coated with a small amount of liquid components, making it easy to dilute, improving kneading and dilution, and reducing time. I was able to plan.

  Further, according to the present invention, as described above, the thickness of the base (the thickness of the stirring blade) W is set to 0.2 ± 0.05 (0.15 to 0.25) with respect to the diameter D of the stirring blade. ), The strength was increased, the agitation blades were not in contact with each other, and no contamination was caused by the contact, and good kneading and kneading results were obtained.

The front view which showed one Example of this invention and was partially cut. Explanatory drawing which shows the relationship between a stirring blade and a tank. The top view of a stirring blade. The front view of a stirring blade and sectional drawing of a vertical side part. Explanatory drawing which shows the relationship between an edge part and a tank inner surface. The assumption reference figure which shows the relationship between the edge part and tank inner surface in case the planar one side cross-sectional shape of a stirring blade is made into a square.

  The present invention can be used in the manufacturing process of inks, paints, ceramics, chemicals, foods, electronic materials and other various products. The frame type stirring blade has a frame whose longitudinal side is twisted in the circumferential direction. A mold twist agitating blade is shown.

  As shown in FIG. 1, the main body 1 of the planetary mixer has three stirring blades (blades) 3 inserted into a stirring tank (tank) 2, and each stirring blade is a motor 4 or a planet as known in the art. Planetary motion is made so that the direction of revolution and rotation in the tank is reversed through the gear mechanism.

  The stirring blade 3 is formed in the frame-type twisted shape having a diameter D in which both sides of an upper side portion 6 communicating with the drive shaft 5 and a lower side portion 7 positioned below are connected by a longitudinal side portion 8 twisted in the circumferential direction. The vertical side portion 8 is twisted in the circumferential direction so that the upper side portion 6 and the lower side portion 7 are positioned 45 ° or 90 ° apart from each other. And the shape of the plane one side cross-section of the stirring blade, that is, the cross-sectional shape of the vertical side portion 8 is inclined from the side 10 extending in parallel outward from both sides of the base 9 and the tip of the side 10. The inclined side 11 extending in this manner and the edge side 12 connecting the tip of the inclined side 11 are formed in a substantially hexagonal cross section. The width d from the base side 9 to the edge side 12 of the vertical side portion (the width of the plane piece cross section) is formed to a width of about 0.15 to 0.25 with respect to the diameter D of the stirring blade.

  The width b of the edge side 12 is formed to be about 6 to 12% of the thickness W of the base side 9 (thickness of the stirring blade). As shown in FIG. 5, the inclined angle (edge angle) θ of the inclined side 11 is formed to be about 85 to 90 °. As shown in FIG. 5, the front angle (material biting angle) θ1 and the rear angle (negative pressure angle). θ2 is formed at about 40 to 50 °. Further, the thickness of the base 9 (thickness of the stirring blade) W is formed to a thickness of about 0.2 ± 0.05 with respect to the diameter D of the stirring blade 3.

  When stirring blades (Examples 1 and 2) having a cross-sectional shape corresponding to the above numerical range were formed and compared with those having shapes outside the range (Comparative Examples 1 to 3), the following results were obtained.

  As described above, according to the embodiment of the present invention, it was possible to uniformly stir and knead without causing adhesion residue on the inner surface of the tank, and good results were obtained in a shorter time than before.

1 Body 2 Mixing tank (tank)
3 Stirring blade 6 Upper side portion 7 Lower side portion 8 Vertical side portion 9 Base side 10 Side side 11 Inclined side 12 Edge side

Claims (4)

  There are a plurality of frame-type stirring blades having a diameter D in which both ends of the upper side and the lower side connected to the drive shaft are connected by vertical sides, and the rotation direction of rotation and rotation of the frame-type stirring blades in a stirring tank (tank) In the planetary mixer in which the processing material is stirred and kneaded by moving the planetary direction in the reverse direction, the frame-type stirring blade is a frame-type twisted stirring blade in which the vertical side portion is twisted in the circumferential direction. The cross-sectional shape is substantially hexagonal in cross section having a side extending in parallel outward from both sides of the base side, an inclined side extending inclined from the tip of the side, and an edge side connecting the tip of the inclined side. The width from the base side to the edge side of the vertical side part (width of the cross section on one side of the plane) d is formed to a width of 0.15 to 0.25 with respect to the diameter D of the stirring blade. Planetary mixer.   The planetary mixer according to claim 1, wherein the width b of the edge side closest to the inner surface of the stirring tank (tank) is 6 to 12% of the thickness (thickness of the stirring blade) W of the base side. .   The front angle (material biting angle) and the rear angle (negative pressure angle) of the inclined side with respect to the inner surface of the stirring tank (tank) are 40 to 50 °, and the included angle (edge angle) between the inclined sides is 85 to 90 °. The planetary mixer according to claim 1 or 2.   The planetary mixer according to any one of claims 1 to 3, wherein the base thickness (thickness of the stirring blade) W is 0.2 ± 0.05 with respect to the diameter D of the stirring blade. .

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