JPH0817930B2 - Disperser - Google Patents

Description

Detailed Description of the Invention [Industrial applications]

TECHNICAL FIELD The present invention relates to a dispersing device for dispersing a liquid compound containing a solid substance such as a pigment such as a paint or an ink.

[Prior art]

Generally, a paint composition containing a solid substance such as a pigment such as a paint or an ink is produced by a dispersion device such as a basket mill using a liquid compound composition including a pigment, a resin varnish, a solvent, and additives (as required). It is carried out by atomizing and dispersing. The basket mill is loaded with the mixture in a stirring tank, and is provided with a stirring blade at the tip of a stirring shaft provided at a length reaching from above the stirring tank into the mixture. When the stirring blade is rotated by the rotation driving device via the stirring shaft, the shear stress between the compounds causes dispersion. In order to enhance this dispersion effect, the outer side of the stirring blade is surrounded by a metal thin plate material having a large number of small holes on the side wall and the bottom wall, or a basket (casket) made of a fine mesh metal rope, When a dispersing medium such as a glass ball, a steel ball, or a ceramic ball is put into the basket and a stirring blade is rotated, large particles of the solid matter in the blend are dispersed in the basket by a grinding and mixing action. The device in which the dispersed fine particles flow out from the bottom wall of the basket and the small holes and meshes on the sides, convection in the stirring tank, and again flow into the basket from above the basket to be further finely dispersed. Have been developed (see, for example, JP-A-60-122033 and JP-A-61-293536). Further, the tip of the stirring shaft is made to project through the bottom wall of the basket, and a blade for liquid flow for flowing the compound in the stirring tank is provided at the tip of the stirring shaft below the cage. The device is being developed. (JP-A-60-48126, JP-A-5
8-174230)).

[Problems to be Solved by the Invention]

In the conventional dispersing device, the compound dispersed in the basket is caused to flow out through the small holes formed in the bottom wall and the side wall of the basket, and the compound flowing out below the basket bottom wall is provided below the basket bottom wall. The convection above the basket is caused by the rotation of the blades for liquid flow, and then it flows into the basket from above again and is dispersed, but the solid substances such as paints and pigments such as ink in the formulation are heavy in the liquid. Therefore, a considerable amount is not dispersed and falls from the small holes on the bottom wall of the basket to the bottom surface of the stirring tank as it is. That is, since the dispersion medium introduced into the basket is gathered around the side wall of the basket by the rotating centrifugal force generated by the rotation of the stirring blade, at least the compound around the stirring shaft is not dispersed at all in the basket. Since it tends to flow out from the small holes in the bottom wall to the bottom of the basket as it is, and to settle below the stirring tank, how to improve the dispersion effect in a short time considering these factors remains a major issue. there were. Further, the solid matter in the composition flowing out of the basket is precipitated below the stirring tank, and the liquid flow impeller provided for stirring the precipitated solid matter and allowing it to flow in the composition is Since the stirring shaft is provided at the tip of the stirring shaft that penetrates through the bottom wall of the basket and projects downwardly of the basket, the stirring medium provided in the stirring shaft and the through holes of the basket bottom wall can disperse the dispersion medium and compound in the basket. There is a problem that the agitator shaft and the agitator shaft bearing are worn by being pinched between the agitator shaft bearing and the shaft bearing. When the agitation shaft and the bearing of the agitation shaft are thus worn, the dispersion medium and the undispersed solid matter further invade from the gap formed between the agitation shaft and the bearing of the agitation shaft due to the wear. However, this may cause malfunction of the entire device. Therefore, in such a conventional dispersing device, there is a problem that the stirring shaft and the bearing of the stirring shaft must be frequently replaced. Further, in the conventional dispersing device, the dispersion medium put into the basket has a plate material in which a large number of small holes are formed in the basket, especially in the side wall, by the centrifugal force of rotation of the stirring blade when the stirring blade rotates. Or, in order to give impact to the side wall such as a fine mesh wire net, the side wall is worn and the impacted part becomes a through hole, so it has to be replaced frequently, but the side wall is a structural member of the basket. If they are integrated, the whole basket must be replaced, and even if the side wall and the structural members of the basket are separable, the whole side wall must be replaced frequently. In addition, the size of the small holes provided in the conventional basket is determined by the size of the mesh such as the mesh of the mesh stretched over the basket. Therefore, the basket needs to be replaced with a basket suitable for the particle size of the solid matter in the compound to be dispersed in each dispersing operation, and there is no single basket capable of dispersing any compound. It was Also, there are many different types of colors in paints, and the pigments to be mixed are different according to each color, but in order to disperse many kinds of such paints and pigments by stirring one after another, For example, after completion of dispersion of one paint, it is necessary to completely wash the stirring tank and the basket taken out from the stirring tank before carrying out the dispersion treatment of the next different kind of paint. However, in the conventional dispersing device, since all the wall surfaces of the basket, that is, the side wall and the bottom wall, have small holes, they are washed with a high-pressure washing liquid, or the pigment clogged in the small holes is pierced with a pin or the like to be removed. If you do not wash the basket and turn the basket upside down, take out the dispersion medium,
There is a problem in that the cleaning cannot be performed, the cleaning work is extremely complicated, and the work efficiency is reduced. A main object of the present invention described in claim 1 is to provide a dispersion device having a high dispersion effect in a short time, and an incidental object of the invention described in claim 2 is the impact of a dispersion medium in a basket. It has a basket that is durable against abrasion due to abrasion, can be easily partially replaced, and can handle dispersion of any kind of compound.
It is an object of the present invention to provide a dispersion device that can be easily washed.

[Means for Solving the Problems]

In order to achieve the above object, in the dispersion apparatus of the present invention, a stirring blade 14 is provided on a shaft 12 that is driven to rotate provided in a dispersion apparatus main body 10 that can be raised and lowered, and the stirring medium 14 accommodates a dispersion medium 37. In a dispersion device that is rotatably provided in the stirred tank 60 and disperses a liquid compound containing a solid material such as a pigment such as a paint or an ink in a stirring tank 60, a rod is provided above the side wall 24 of the basket 20. The basket 20 is fixed to the disperser main body 10 by connecting 13 to each other, and a large number of small holes 35 through which the mixture passes are formed in the side wall 24 of the basket 20, and the bottom wall 29 is provided with the small holes. No blinds bottom plate
39, and between the basket 20 and the inner wall of the stirring tank,
A liquid-flowing shaft 46, which is rotationally driven by a driving means, is arranged, a liquid-flowing blade 47 is attached to the liquid-flowing shaft 46, and the liquid-flowing blade 47 is provided in the stirring tank and in the basket 20. It is provided at a position where it does not interfere (claim 1). Furthermore, a plurality of side wall flat plates 27 and a plurality of gap plates 28 shorter than the side wall flat plates 27 in the circumferential direction of the side walls 24 are alternately stacked on at least a part of the side walls 24 of the basket 20 that can be raised and lowered together with the dispersion device body 10. Side wall plates facing each other vertically
A small hole 35 formed by a slit formed by 27 and a gap plate 28 facing the circumferential direction of the basket 20 may be provided (claim 2). Further, it is preferable that the inner surface of the bottom wall 29 is tapered (claim 3). In addition, a basket is provided on the side wall 24 of the basket 20.
It is also possible to provide a flange portion 36 projecting in the outer peripheral direction of 20 and connect the rod 13 to the flange portion 36 to fix the basket 20 to the dispersion device main body 10 (claim 4). In addition, it is preferable that the bottom wall 29 be provided with a dispersion medium extraction hole 31 that can be opened and closed (Claim 5). Then, the stirring blade 14 rotating in the basket
Is preferable if the projection 45 is provided in the direction perpendicular to the rotational trajectory of the stirring blade 14 (claim 6). More preferably, it is effective to dispose the respective projections 45 provided on the stirring blade 14 on two or more different rotation loci (claim 7).

[Action]

When the basket 20 of the dispersion device configured as described above is charged into the mixture 65 in the stirring tank 60, the mixture 65 flows into the basket 20. The bottom wall 29 of the basket 20 is a blind bottom plate 39, and the particles of the solid matter that are likely to settle in the formulation 65 stay in the basket 20 without falling downward from the bottom wall of the basket 20. When the stirring blades 14 of the dispersing device are rotationally driven by the rotary driving mechanism 11 via the stirring shaft 12, the basket 20 is fixed to the main body by the rod, so that the basket 20 itself does not rotate and the stirring is performed inside the basket 20. The vanes 14 rotate within the basket 20. Due to the vortex flow generated by the rotation of the stirring blade 14,
The compound 65 in the basket 20 and the solid substance in the compound 65 are dispersed into fine particles by the shear stress with the dispersion medium 37 and the shear stress between the solid substances. At this time, by the centrifugal force of the stirring blade 14, the dispersion medium put in the basket 20.
37 is a small hole provided on the side wall 24 of the basket 20 because the bottom wall is pressed against the inner circumference of the side wall 24 of the basket.
The composition that is going to flow out of the basket 20 from the 35 always passes through the dispersion medium 37 that circulates in the basket 20 along the inner periphery of the side wall 24 of the basket 20, and the solid matter in the composition is the dispersion medium 37 and The solids are finely dispersed by mutual shearing stress, and flow out of the basket through a small hole 35 provided in the side wall 24 of the basket 20. Particles larger than the width of the small holes 35 remain in the basket 20 and are more finely dispersed by the shear stress between the solid matter and the shear stress between the dispersion medium 37 and the solid matter. In the liquid, the solid matter, which is a heavy material, tends to precipitate below the stirring tank, but the liquid flow vane 47 is provided at a position in the stirring tank where the solid matter is precipitated and does not interfere with the basket 20. It rotates with the rotation of the liquid flow shaft. Therefore, the solids in the composition, which tend to settle in the stirring tank, are stirred in the stirring tank without being settled by the convection generated by the rotation of the liquid flow vanes 47. Further, by the rotation of the blade 47 for liquid flow, in the stirring tank, convection occurs upward from the bottom of the stirring tank, the mixture 65,
Due to this convection, it flows into the basket 20 again through the opening 38 provided in the lid plate 22 and is dispersed. Further, in the case where the flange portion 36 protruding in the outer peripheral direction of the basket is provided on the upper portion of the side wall of the basket (claim 4), the convection generated in the upper part of the stirring tank by the rotation of the blade 47 for liquid flow. A part of it hits the flange portion 36 to generate a vortex below the flange portion 36 to temporarily retain the compound 65 around the side wall 24. Therefore, the basket 20
The composition 65 therein stays in the basket 20 for a relatively long time, and enhances the dispersion effect of the solid matter. In addition, the side wall 24 of the basket 20 has a side wall flat plate 27 and a gap plate.
When the slits 35 are formed by overlapping with 28 (Claim 2), the side wall of the basket 20 is dispersed according to the particle size of the solid matter contained in the compound when the different compounds are dispersed.
When changing the size (width) of the small holes 35 provided in 24, it is sufficient to change the thickness of the gap plate 28, and various compounds can be dispersed with a single basket. Thus, after the completion of the dispersion process, in the case of dispersing another type of formulation 65, it is necessary to completely wash the dispersing device before that, but at this time, the solid matter stuck in the slit 35 Can be removed and washed relatively easily with a tool such as a spatula. In addition, when the side wall flat plate 27 is worn, deformed, or damaged by the collision with the dispersion medium 37, only the worn, deformed, or damaged side wall flat plates 27 may be partially replaced. The basket 20 can be repaired easily and economically. Further, tapering the inner surface of the bottom wall 29 (Claim 3) accelerates liquid drainage, and additionally forming the dispersion medium extraction hole 31 in the blind bottom plate 39 (Claim 5) causes beads and the like to pass therethrough. Allows the dispersion medium to be easily removed and washed separately. When the stirring blade 14 is provided with a projection 45 provided in a direction perpendicular to the rotation trajectory of the stirring blade 14 (claim
6, 7), and acts to increase the stirring effect of the dispersion medium 37 and solids near the bottom wall 29.

【Example】

An embodiment will be described with reference to the drawings. In FIG. 1, the rotary drive mechanism 11 is installed above the lift shaft 53 of the lift device 50, and the dispersion device of the present invention is installed below the tip of the rotary drive mechanism 11. To do. The elevating device 50 is provided with an ascending valve 55 and a descending valve 56 for allowing the rotary drive mechanism 11 installed above the elevating shaft 53 to be stopped and adjusted at an arbitrary position by a hydraulic cylinder (not shown) inside the elevating device main body 51, The rotation drive mechanism
A guide shaft 54 for guiding 11 is provided. The rotary drive mechanism 11 is provided with a transmission device (not shown) on the rotation shaft of the motor 41, and the rotational force adjusted by the shift handle 42 of the transmission device is used to transmit the rotational force, which will be described later, to the dispersion device main body 10 via a transmission means such as a V-belt. It is linked to the stirring shaft 12. A tachometer 16 for measuring the rotation speed of the stirring shaft 12 is provided. The dispersing device includes a fixing flange of a flange portion 36, which will be described later, that protrudes in the outer peripheral direction of the basket above the side wall 24 of the basket 20 via the four rods 13 below the rotary drive mechanism 11.
21 to fix the basket 20 to the dispersion device main body 10,
In the basket 20, a stirring blade 14 provided via a stirring blade support 15 at the tip of a stirring shaft 12 that is interlocked with a motor 41 of the rotary drive mechanism 11 is rotatably installed, and A dispersion medium 37 such as a glass sphere, a steel sphere, a ceramic sphere, or a zirconia sphere is contained in the. The basket 20 has a large number of small holes on its side wall. Since the dispersing device of the present invention has the small holes only in the side wall of the basket 20, the solid matter which is a heavy material in the liquid tends to fall downward in the liquid, but the bottom wall of the basket is the blind bottom wall. Therefore, solid matter will not fall out of the basket 20 from the bottom wall. Therefore, when the small holes of the basket 20 are provided only on the side wall of the basket as compared with the case where the small holes are provided on the bottom wall of the basket, the solid substance stays in the basket for a longer time and is dispersed more finely. In this basket 20, a vortex flow circulating in the basket 20 is generated by the rotation of the stirring blades 14, and the solid matter circulates in the basket 20 on the vortex flow. Further, since the vortex generated by the rotation of the stirring blade 14 stirs the dispersion medium 37 charged in the basket 20 on the inner circumference of the side wall of the basket, the mixture and the solid matter in the mixture are stirred. The vortex flow generated by the blades circulates in the basket and tries to flow out of the basket 20 through a small hole 35 provided in the side wall 24 of the basket 20. Therefore, such formulations and solids in the formulations are
It constantly passes through the inside of the side wall 24 of 20, ie, the dispersion medium 37 gathered in the vicinity of the small hole 32, and is finely dispersed by the shear stress between the solid substances and between the solid substance and the dispersion medium, and flows out of the basket. Therefore, the dispersion effect of the formulation is extremely good. Further, as shown in FIG. 6 and FIG. 7, a liquid flow shaft 46, which is rotationally driven by a motor 48 which is a rotary drive means, is provided between the outside of the basket 20 and the inner wall of the stirring tank 60, and the liquid flow is performed. Liquid flow vane 47 on shaft 46, in stirring tank 60,
It is provided at a position that does not interfere with the basket 20, for example, below the bottom wall 29 of the basket 20. FIG. 6 shows a liquid-flowing blade 47 provided at the tip of a liquid-flowing shaft 46 which is directly connected to a motor 48 installed on the mount of the rotary drive mechanism 11 and which is provided below the basket 20. FIG. 7 shows that a motor 48 is provided on the lower surface of the bottom of the stirring tank 60, is directly connected to the motor 48, and is inserted into the hole provided at the bottom of the stirring tank 60. Electric stirring tank 60
Is provided with a liquid-flowing blade 47 at the tip of a liquid-flowing shaft 46 projecting upward from the bottom of the basket, and the lifting device is provided so that the bottom wall of the basket 20 does not contact the liquid-flowing blade 47.
Stop at a predetermined position by 50. As described above, the liquid flow blade 47 is provided on the liquid flow shaft 46 provided separately from the stirring shaft 12, that is, below the stirring tank 60.
Further, since it is provided apart from the outside of the basket 20, for example, even when the basket 20 is moved upward in the stirring tank 60, the liquid flow vanes 47 are stirred so that solid matters tend to settle. Since the composition below the tank is flowing, the composition containing the solid matter can be uniformly convected without being affected by the stop position of the basket 20. Further, since the liquid flow blade 47 is provided on the liquid flow shaft 46 that is formed separately from the stirring shaft 12 that rotates the stirring blade 14 in the basket 20, the bottom wall of the basket 20 is provided. A bearing is provided on 29 (, 39) and the stirring shaft 12 is attached to the basket 20.
Since it is not necessary to project it outward from the bottom of the base, the bearing is not worn and the dispersion medium 37 and solid matter do not flow out of the basket 20. The small holes provided on the side wall of the basket 20 may be a thin metal plate material having a large number of fine holes or slits, or a fine mesh metal rope, but wear and small holes due to collision with a dispersion medium or the like 35 Considering the change of the size (width), the side wall of the basket, and the convenience of repair when the slit part is damaged or deformed, as shown in FIG. 2 to FIG. Further, a plurality of side wall flat plates 27, which are flat plates having a constant width, and a plurality of gap plates 28 shorter than the side wall flat plates 27 in the circumferential direction of the side walls 24 are alternately stacked, and the gap plates 28 are provided at appropriate positions around the side walls 24. It is preferable that the small holes 35 are formed of slits which are arranged and vertically arranged on the side wall flat plates 27, 27 and the gap plates 28, 28 facing each other in the side wall circumferential direction. That is, if the slit 35 of the side wall 24 is configured in this way, the wall thickness of the side wall 24 at the portion where the slit 35 is provided can be easily increased, and the life of the side wall 24 is improved by the increased wall thickness. You can Further, since the slit 35 configured in this manner is always formed with a constant width in the thickness direction of the side wall 24, the slit 35 may be slightly collided by the dispersion medium 37 as compared with the case where the small hole 35 is formed by a mesh wire mesh or the like. Even if the periphery of the small hole 35 is worn, the size of the small hole does not vary. Further, when changing the size (width) of the small hole 35 made of a slit, it can be adjusted by changing only the thickness of the gap plate 28. Therefore, by changing the thickness of the gap plate 28, a single basket is formed. This makes it possible to handle distributed work according to various uses. Furthermore, a plurality of side wall flat plates 27 and gap plates 28, which are independent of each other, are provided.
Since the slit 35 is formed by the polymerization of, the side wall flat plate is partially worn due to the collision of the dispersion medium nad to widen the slit width, or even when the compound or the like is narrowed in the slit, it is worn. By exchanging or repairing only the side wall flat plate 27, the slit shape can be restored to the original preferable state, and the basket 20 can be repaired economically without any trouble of repair. The overlap between the side wall flat plate 27 and the gap wall 28 is caused by the fixed flange 21.
A side wall 24 is formed by providing a blind side wall 26 on the lower surface of the side wall 24 around the entire circumference of the side wall 24, and alternately stacking a plurality of side wall flat plates 27 and gap plates 28 on the lower surface of the blind side wall 26 over the entire circumference of the side wall 24. However, a plurality of fixing holes are provided at the same positions of the blind side wall 26 and the side wall flat plate 27 at the same position in this embodiment, and 12 holes are provided, and the gap plate 28
The side wall fixing rod 25 is inserted into the respective fixing holes of the blind side wall 26, the side wall flat plate 27, and the gap plate 28 by providing a fixing hole in the side wall of the blind side wall 26, a side wall flat plate 27, and a gap plate 28.
The screw portion provided on the above is screwed to the fixing flange 21, and the bottom wall 29 is fixed with a nut via the screw portion provided at the lower end of the side wall fixing rod 25. Therefore, the slit 35 is formed on the entire side wall 24 except the blind side wall 26. In this case, the blind side wall 26 may not be provided, and the side wall flat plate 27 and the slit 35 formed by the gap plate 28 may be formed on the entire surface of the side wall 24, or the side wall flat plate 27 may be formed.
The slit 35 formed by the gap plate 28 may be partially provided around the side wall 24. On the upper surface of the basket 20, a liquid mixture 65 containing solid matter such as paints and pigments such as ink in a stirring tank 60, which will be described later, is introduced into the basket 20. It has an opening 38 for squeezing and opening the formulation 65.
A lid plate 22 having a guide surface 23 formed in a tapered shape on the upper surface for being introduced into 38 is fixed to the fixing flange 21. Further, the outer peripheral surface of the fixed flange 36 located above the side wall 24 of the basket 20 is made to project more than the outer peripheral surface of the side wall 24 as shown in FIG. By thus projecting the flange 36 outward of the basket, a part of the convection generated by the liquid flow vanes 47, which will be described later, from above the lower part of the stirring layer collides with this flange part, and this convection Becomes a vortex and stays below the flange, so that the mixture can be suppressed to some extent from the inside of the basket to the outside. As a result, the formulation can be retained in the basket for a long time, increasing the dispersion efficiency of the formulation in the basket. Then, on the bottom surface of the basket 20, a bottom wall 29 is provided on the lower surface of the side wall 24, and the bottom wall 29 is used as a blind bottom plate 39 without providing a small hole such as a slit or a fine mesh net through which the compound 65 flows. ing. In the conventional dispersing device, since the dispersing medium is gathered toward the side wall 24 of the basket 20 due to the vortex flow generated in the basket 20, the compound and the dispersing medium 37 are less in the center of the inside of the basket 20 and this portion is less. The composition flowing out of the basket through the small holes provided in the bottom wall of the container is not dispersed by the shearing stress between the dispersion medium and the composition, so that the composition must be repeatedly dispersed by convection. Therefore, it takes a long time to obtain the desired dispersion effect. However, according to the basket 20 of the dispersing device of the present application, the dispersion medium 37 and the compound are concentrated and the small holes 35 through which the compound can flow out of the basket 20 are formed only on the side wall 24 of the basket 20 which contributes to the dispersion. Since it is provided, the compound that is about to flow out of the basket 20 through the small holes 35 always passes between the dispersion media 37 charged in the basket 20,
The solids in the blend are finely dispersed by the shearing medium 37 and the shear stress between the blends. Furthermore, the blind bottom plate 39 has its inner surface centered on the side wall 24.
It has a tapered shape that descends in the direction, and further has a dispersion medium extraction hole 31 formed on the side wall 24 side of the blind bottom plate 39, and the dispersion medium extraction hole 31 is a dispersion medium extraction hole lid 32 during dispersion work. It is blocked. Therefore, the dispersion medium 37 can be easily pulled out from the basket 20, and at this time, there is no need to incline the basket 20 or turn it upside down. The stirring tank 60 shown in FIG. 1 has a bottom wall that is tapered so that the liquid in the tank can easily flow out. A drain valve 61 is provided near the tip of the taper, and wheels 62 are provided to make it movable. can do. Next, the operation of this embodiment will be described. A liquid mixture 65 consisting of a solid material such as a pigment such as a paint or an ink, a resin varnish, a solvent and an additive is charged into the stirring tank 60, and the dispersion of the present invention is dispersed in the tank as described later. Device body 10
Is installed. When the lift valve 55 at the lift position 50 is opened, the lift device body 51
A cylinder (not shown) inside operates and is guided by the guide shaft 54 as the lifting shaft 53 rises, thereby rotating the drive mechanism.
As 11 rises, the basket 20 of the dispersion device body 10 provided at the tip of the rotary drive mechanism 11 also rises. In this state, the stirring tank 60 loaded with the mixture 65 is moved to be installed at a predetermined position below the basket 20, the lowering valve 56 of the elevating device 50 is opened, and the basket 20 of the dispersion device main body 10 is stirred. 60 into the formulation 65. When the motor 41 of the rotary drive mechanism 11 is driven, the stirring shaft 12 of the dispersion device main body 10 is rotationally driven via a transmission means such as a V belt (not shown). The rotation speed of the stirring shaft 12 is adjusted by 42. By the rotation of the stirring blade 14 provided on the stirring shaft 12, the mixture 65 in the stirring tank 60 flows into the basket 20 through the opening 38 provided in the lid plate 22 on the upper surface of the basket 20, and the stirring blade 14 And the basket 20 that is stirred by the rotation of the projection 45 that projects vertically to the rotation trajectory of the stirring blade 14.
The solids in the compound 65 are finely dispersed by the shear stress between the dispersion medium 37 and the compound 65 in the mixture, but the particles of the dispersed solids and the fluid such as liquid are caused by the rotation of the stirring blade 14. By the centrifugal force, it flows out of the basket 20 through the small hole 35 formed of the slit provided in the side wall 24.
The upper compound 65 flows from the tapered guide surface 23 provided on the upper surface of the cover plate 22 into the opening 38 and is introduced into the basket 20. The compound 65 which has passed through the slit 35 and has flowed out of the basket 20 has the effect of this outflow action, as shown in FIG.
As shown in the figure, it is convected upward by the liquid flow vanes 47 provided below the stirring tank and outside the basket 20, and then flows into the basket 20 again. Among the solid particles dispersed in the basket 20, particles larger than the width of the slit 35 determined by the thickness of the gap plate 28 cannot pass through the slit 35, and thus the basket 20
It is more finely dispersed within. Therefore, by adjusting the plate thickness of the gap plate 28, the dispersion state can be adjusted according to the kind of the compound. After the dispersion processing is completed as described above, the motor 41 is stopped, the raising valve 55 is opened, and the basket of the dispersion apparatus main body 10 is opened.
20 is lifted from the stirring tank 60, and then the stirring tank 60 is carried out. Since the inner surface of the blind bottom plate 39 is tapered,
When the basket 20 is taken out of the compound 65 in the stirring tank 60, the compound 65 in the basket 20 is drained well, so that the compound 65 is not wasteful and effective. Before dispersing another type of formulation 65,
10 is thoroughly washed, and the subsequent dispersion treatment is performed in the same manner. The dispersion medium 37 in the basket 20 can be easily removed from the dispersion medium extraction hole 31 of the blind bottom plate 39, and the dispersion medium 37 can be separately washed. Next, a description will be given of an embodiment of a stirring blade for further enhancing the dispersion effect.The stirring blade 14 attached to the stirring shaft 12 is provided with a projection 45 in a direction perpendicular to the rotation locus of the stirring blade 14. In addition, the respective projections 45 provided on the plurality of stirring blades 14 are arranged on two or more different rotation locus surfaces. For example, referring to FIG. 5, the same parts as those of the embodiment shown in FIG. 2 will be omitted. In FIG. 5 (A), the stirring blade 14 will be referred to as a cross-shaped flat plate stirring blade 44. It is also possible to project the protrusions 45 on the upper and lower surfaces of the tip of the stirring blade 44. In this case, the position of the protrusion 45 is on two different rotation loci. In this embodiment, four stirring blades
Although 44 are provided, vertically adjacent stirring blades 44 are alternately arranged on different rotation paths. The protrusion 45 may be on one side without protruding on both upper and lower surfaces of the stirring blade 44. The stirring blade 44 may be the stirring blade 14 shown in FIG. 2, and the projection 45 may be fixed to the stirring blade 14. The side wall 24 is composed of a blind side wall 26 and a side wall provided with a small hole 35 formed of a slit formed by alternately stacking a side wall flat plate 27 and a gap plate 28, and the slit 35 is provided below the side wall 24. The entire area below the fixed flange 21 outside the basket 20 is covered with a closed casing 40 shown by a chain double-dashed line in the figure. Further, a lid plate 43 is provided on the upper surface of the basket 20 for supporting the stirring shaft 12 and an O-ring for preventing the mixture 65 from leaking out, and an opening for introducing the mixture 65 into the basket 20 from above. It is possible to circulate the compound 65 that has been fixed and dispersed in the casing 40 from the drain of the casing 40 to the opening of the lid plate 43 by piping (not shown) or the like. Next, the results of a performance comparison test of the dispersion apparatus of the present invention having the above-described configuration and a conventional apparatus typically disclosed in JP-A-48-48126 are shown below. The specifications of each dispersing device used in the test are as follows. Test example 1 Under the above conditions, using the cyanine blue paste under the above compounding conditions as a sample, the compounding (paste) with respect to the dispersion time
The particle size was measured. The results are shown in Graph 1 on the next page.

[Graph 1] Relationship between particle size and dispersion time (blue paste) As is clear from the results shown in Table 1, it was revealed that the dispersing device of the present application can finely disperse solid matter in a shorter time than the conventional product. Further, a test of the coloring power against the dispersion time of the compound obtained as a result of the above-mentioned test was conducted. The results are shown in Graph 2 and Table 1. The coloring power (K / S) is a unit of light reflection / absorption measured by a spectrophotometer. The larger the value, the more light is reflected and a clearer color is produced.

[Graph 2] Relationship between coloring power and dispersion time (blue paste) As is clear from the above results, according to the dispersing device of the present application, it was possible to obtain a compound having a high coloring power in a shorter time than the conventional product. Test example 2 Under the above-mentioned conditions, the paste of carbon beads under the above-mentioned compounding conditions was used as a sample to measure the paste particle size with respect to the dispersion time. However, in the conventional dispersion device, it was not possible to disperse the carbon beads due to the clogging of the small holes in the basket. The device of the present application is superior to the conventional device in terms of dispersion effect such as dispersion speed, coloring power, and particle size distribution, and the device of the present application can disperse carbon beads.

【The invention's effect】

The present invention has the effects as described below in addition to the above-mentioned test values. Since the bottom wall of the basket is a blind bottom plate that does not have the small holes through which the composition passes, the composition flowing out of the basket is only from the side wall, so the particles of the finely dispersed solid particles are less likely to settle, It will enhance the dispersion effect. The following table is a comparative table showing the dispersion effect and time of the conventional example having the same other configuration but having a small hole in the bottom wall, the present invention, and the dispersion device including the blind bottom plate. Further, between the basket and the inner wall of the stirring tank, a liquid flow shaft which is rotationally driven by a drive means is arranged.
Since a liquid flow vane is attached to 46, and the liquid flow vane is provided inside the stirring tank and at a position where it does not interfere with the basket, it is outside the basket regardless of the arrangement position of the basket. Because the flowability of the formulation is improved,
The particles of the solid matter that tend to precipitate rise into the basket again and are dispersed, further enhancing the dispersing effect. Further, since the blade for liquid flow is provided on the liquid flow shaft which is configured separately from the stirring shaft, it is not necessary to provide a bearing for penetrating the stirring shaft on the bottom wall of the basket. No adverse effects due to bearing wear occur. In addition, when a flange portion projecting in the outer peripheral direction of the basket is provided on the upper portion of the side wall of the basket (Claim 4), the compound flowing out from the small hole causes a vortex flow near the lower portion of the flange portion. In addition, since the convective composition temporarily stays around the side wall, the composition in the basket stays in the basket for a relatively long time, is better dispersed, and as a result, the dispersion work time is extremely shortened. be able to. Further, at least a part of the side wall of the basket is alternately laminated with a plurality of side wall flat plates and gap plates shorter than the side wall flat plates in the circumferential direction of the basket, and the side wall flat plates facing each other in the vertical direction are opposed to each other in the circumferential direction of the basket. If a small hole consisting of a slit formed with the gap plate is provided (Claim 2), it cannot pass through the slit on the wall side in the side wall due to the centrifugal force of rotation of the stirring blade, but a solid having a size close to the width of the slit. Particles of the object may become stuck in the slit, and if the width of the slit is narrow, this phenomenon is even more likely to occur, but the solid matter stuck in the slit is changed to the shape of the slit. Using a tool such as a spatula, it can be removed easily, efficiently, and almost completely.After that, wash the dispersion device with jet water or rotate the stirring blade in the water tank. It can be completely washed Runado. Further, even if the dispersion medium contained in the basket impacts the side wall by the rotational centrifugal force of the stirring blade, the side wall flat plate is a flat plate having a constant width in the thickness direction of the side wall, so that the side wall flat plate receives the shock. There is no through hole, it is durable, and even if the side wall flat plate is deformed by some impact or wear becomes large, it is easy to partially replace it. can do. In addition, even if the width of the slit is quite narrow, it has the effect of reducing solid particles of a size close to the width of the slit from being forcibly inserted and fixed in the slit. Therefore, the dispersion effect can be increased as a result. When the stirring blade is provided with a projection in the direction perpendicular to the rotational trajectory of the stirring blade (claim 6), the dispersion medium and the solid matter of the compound in the basket 6 are further stirred. Therefore, the shear stress between the dispersion medium and the solid matter of the formulation becomes active, and the dispersion effect is increased. Furthermore, since the inner surface of the blind bottom plate is tapered (Claim 3), when the basket is taken out from the mixture in the stirring tank, the mixture in the basket is drained well, so that the waste of the mixture is reduced. It is also effective for subsequent cleaning. Further, since the dispersion medium extraction hole is formed in the blind plate (Claim 5), the dispersion medium in the basket can be easily removed and the dispersion medium can be separately washed, so that the cleaning effect and efficiency can be improved. Also gets better. Further, if the respective projections provided on the plurality of stirring blades are arranged on two or more different rotation loci (claim 7), the solid content of the dispersion medium and the compound in the entire basket will be better. The stirring effect increases the dispersion effect for the same reason as above.

[Brief description of drawings]

FIG. 1 is an overall view of a mechanism including a dispersion device of the present invention. FIG. 2 is a partial detailed view of the dispersion device. FIG. 3 is a partial detailed view of the side wall of the basket. FIG. 4 is a partial perspective view of the side wall of the basket. FIG. 5 (A) is a partial detailed view of a dispersing device of another embodiment. FIG. 2B is a plan view of the stirring blade taken along the line BB in FIG. FIG. 6 shows an overall view of a dispersion device provided with a liquid flow vane. FIG. 7 shows an overall view of a dispersion device provided with another liquid flow vane. 10 …… Disperser main body 11 …… Rotation drive mechanism 12 …… Stirring shaft 13 …… Rod 14 …… Stirring blade 15 …… Stirring blade support 16 …… Tachometer 20 …… Basket (basin) 21 ...... Fixed flange 22 ...... Cover plate 23 ...... Guide surface 24 ...... Side wall 25 ...... Side wall fixing rod 26 …… Blade wall side 27 …… Side wall flat plate 28 …… Gap plate 29 …… Bottom wall 31 …… Dispersing medium Hole 32 …… Dispersion medium removal hole cover 35 …… Small hole (slit) 36 …… Flange 37 …… Dispersion medium 38 …… Opening 39 …… Blade bottom plate 40 …… Casing 41 …… Motor 42 …… Gearing handle 43 …… Lid plate 44 …… Stirring blade 45 …… Projection body 46 …… Liquid flowing shaft 47 …… Liquid flowing blade 48 …… Motor 50 …… Lifting device 51 …… Lifting device body 53 …… Lifting shaft 54 …… Guide shaft 55 …… Upward valve 56 …… Down valve 60 …… Stirring tank 61 …… Drain valve 62 …… Wheel 65 …… Compound

Claims (7)

[Claims] 1. A pigment, such as a paint or an ink, in a stirring tank, which is provided with a stirring blade on a shaft which is provided in a main body of a dispersion device which can be raised and lowered and is rotatably provided in a basket containing a dispersion medium. In a dispersion device that disperses a liquid composition containing a solid substance such as, a rod is connected to the upper part of the side wall of the basket to fix the basket to the main body of the dispersion device, and the composition is passed through the side wall of the basket. A large number of small holes are formed, the bottom wall is formed by a blind bottom plate without the small holes, and a liquid flow shaft that is rotationally driven by a driving means is arranged between the basket and the stirring tank inner wall.
A dispersion device, wherein liquid-flowing blades are attached to the liquid-flowing shaft, and the liquid-flowing blades are provided in the stirring tank at a position where they do not interfere with the basket. 2. A plurality of small holes formed in the side wall of the basket, wherein at least a part of the side wall of the basket includes a plurality of side wall flat plates and a plurality of gap plates alternately arranged in the circumferential direction of the side wall and shorter than the side wall flat plates. The dispersing device according to claim 1, wherein the dispersing device is a small hole formed by a slit formed by stacking side wall flat plates facing each other vertically and gap plates facing each other in the circumferential direction of the side walls. 3. The inner surface of the bottom wall is tapered.
Or the dispersing device according to 2. 4. The dispersion according to claim 1, wherein a flange portion protruding in the outer peripheral direction of the basket is provided on an upper portion of a side wall of the basket, and a rod is connected to the flange portion to fix the basket to the main body of the dispersion device. apparatus. 5. The dispersion device according to claim 1, 2 or 3, wherein an opening / closing hole for the dispersion medium is formed in the bottom wall. 6. The dispersion device according to claim 1, wherein the stirring blade is provided with a projection in a direction perpendicular to the rotation locus of the stirring blade. 7. The protrusions provided on the plurality of stirring blades are arranged on two or more different rotation loci.
Dispersion device as described.