CN1118330C - Dispersing apparatus - Google Patents

Abstract

The present invention aims to provide a continuous dispersion device used for dispersing particle media in a container by stirring blades, and therefore, a material to be dispersed can be satisfactorily dispersed. The continuous dispersion device effectively uses the energy of the stirring blades to disperse pigment so as to reduce the amount of the loaded particle media, avoid short circuits and blockage phenomena, ensure safe operation, obtain optimal crushing effects and dispersion effects and obtain economic benefits. The dispersion device comprises a first rotating shaft (5A) and a second rotating shaft (5B) which are arranged in a cylinder (3), wherein the cylinder (3) is provided with a feed opening and a discharge opening for materials to be dispersed, and the first rotating shaft and the second rotating shaft are arranged in parallel and can rotate; a set of stirring blades (7A and 7B) are in stagger arrangement along the first rotating shaft and the second rotating shaft with random axial spaces; the particle media are used for material dispersion technical processes and are packed in the cylinder (3), wherein the rotation areas of the stirring blades (7A and 7B) arranged on the first rotating shaft and the second rotating shaft are partially overlapped; and the inner surface of the cylinder (3) is combined with two circular arc surfaces (9A and 9B) and is formed along the outer rotating end of the stirring blades (7A and 7B) arranged on the first rotating shaft and the second rotating shaft.

Description

dispersion device

field of invention

The present invention relates to a kind of dispersing device that carries out dispersing process to material, and this material is, for example, the raw material of a kind of pigment slurry, wherein pigment powder is dispersed in varnish or solvent with high concentration; The present invention particularly relates to a kind of dispersing device, this In the device, the moving distance of the material to be dispersed in the container is lengthened, so that the material can be fully dispersed.

Background technique

For example, printing inks or coating materials are manufactured using pigment pastes in which powdery pigments are dispersed in high concentrations in varnishes or solvents. During the dispersion process of powdered pigments in solvents or similar media, the regenerated particles formed by the aggregation of pigment powders are preferably pulverized and dispersed in solvents to form fine pigment particles without coarse particles. In order to improve the coloring ability of printing inks or coating materials.

So far known dispersing devices are sand mills, abrasive mills, ball mills, attritors and the like. Among the above-mentioned dispersing devices, a device for continuously performing the dispersing process is configured as shown in FIG. 7 .

That is to say, the device is a horizontal structure with a cylinder 101 arranged horizontally. In the cylinder 101, a rotating shaft 103 is installed horizontally and can rotate. A group of rod-shaped stirring blades 105 protrude radially from the rotating shaft 103 and are arranged at random intervals along the axial direction. In the cartridge 101, a spherical granular medium 107 made of steel, ceramic or stone is encapsulated in it for the process of dispersing the material.

Using the above-mentioned structure, when the rotating shaft 103 is driven by a motor or other similar equipment to rotate, the pigment paste raw material is loaded through the feed port 109 at one end of the cylinder 101, and the granular medium 107 is stirred by the stirring paddles mounted on the rotating shaft 103. Thus, the process of dispersing the raw material of the pigment paste can be carried out. The pigment slurry subjected to the dispersion process is continuously discharged from the discharge port 111 located at the other end of the cylinder 101 .

The above-mentioned structure sometimes faces a so-called "short pass" problem. At this time, the pigment slurry raw materials entering the cylinder 101 through the feed port 109 are not evenly dispersed, and the pigment slurry containing coarse pigment particles passes through the discharge port. 111 discharge. This presents a problem that the dispersion process cannot be carried out satisfactorily.

Observing the movement of the granular medium 107 reveals that the granular medium tends to rotate together with the stirring blades on the rotating shaft 103 , so there is a problem that the dispersion process cannot be effectively implemented.

The "short circuit" problem is avoided to some extent if the charge rate of the granular media 107 into the cartridge 101 is increased to prevent "short circuit". However, if the filling rate of the granular medium 107 is excessively increased, clogging will occur, and the granular medium 107 in the barrel 101 will move toward the discharge port 111 eccentrically at this moment. Then, another problem occurs in that the process operation cannot be performed safely. Therefore, the charging rate of granular media generally takes 75% to 80% of the process operation time.

A commonly used structure is shown in Figure 8, the device is a vertical structure, in which the cylinder 101 is arranged vertically. The rotating shaft 103 that stirring paddle 105 is housed is installed vertically, can rotate.

The above-mentioned structure is formed by converting the horizontal structure into a vertical structure, wherein the raw material of the pigment slurry enters the cylinder 101 through the feeding port 109 located at the upper part of the cylinder 101 . In addition, the rotating shaft 103 rotates to agitate the granular medium 107, thereby realizing the process of dispersing the raw material of the pigment paste. The pigment slurry that has undergone the dispersion process is discharged from the discharge port 111 located at the bottom of the cylinder 101 . The discharge port 111 has a granular medium separation mechanism 113, the type of the separation mechanism, for example, can be a grid type or a mesh shape, and is used to prevent the discharge of the granular medium 107; the discharge port 111 also has a raw material discharge valve 115, which can be opened/closed Close the discharge port 111.

Since the above structure simply converts the cylinder 101 from a horizontal structure to a vertical structure, there are also problems similar to those suffered by the horizontal structure.

Another commonly used structure is shown in Figure 9 and Figure 10. Roughly speaking with a schematic diagram, the layout of the structure is such that the first and second rotating shafts 117A and 117B are vertically installed in the vertically arranged cylindrical barrel 101, and the plate-shaped first and second stirring blades 119A and 119B , are arranged with a phase difference of 90° to each other, and are installed on the first and second rotating shafts 117A and 117B to avoid interference between the first and second stirring blades 119A and 119B.

With the above structure, part of the rotation loci of the first and second stirring blades 119A and 119B are overlapped. However, since the first and second stirring blades 119A and 119B are plate-shaped, a part of the pigment paste raw material in the cylinder 101 will turn together in the cylinder. In addition, those parts adjacent to the area 121A and 121B are outside the rotation area of the first and second stirring blades 119A and 119B. Thus, there arises a problem that, during the dispersion process, the pigment paste raw material cannot be satisfactorily dispersed, which also results in unevenness.

As prior art related to the present invention, disclosed inventions include Japanese Patent No. 1-224057 (Prior Art 1), U.S. Patent No. 4,673,134 (Prior Art 2), U.S. Patent No. 3,199,792 (Prior Art 3), US Patent No. 4,919,347 (Prior Art 4) and US Patent No. 4,998,678 (Prior Art 5).

Prior art 1 has such a structure that its first and second shafts are vertically installed in a cylinder with an oblong section and can rotate therein; the first and second shafts mounted on the first and second shafts A portion of the rotation trajectories of the stirring blades overlaps. Yet, the dead space (dead spaces) that is surrounded by cylinder inner surface and rotation locus is triangular in nature; When the rotation direction of the first and second stirring blades is observed, the two sides are the same. Pigment slurry material located in the dead zone, which cannot be dispersed satisfactorily, is also prone to non-uniform results.

Prior art 2 has disclosed a structure, wherein a group of rotating shafts are equipped with stirring blades. Similarly, the structure of the prior art 2 also encounters a substantially triangular dead zone formed between the rotation track of the stirring blade and the inner surface of the cylinder. Thus, a problem similar to that experienced in prior art 1 arises.

Prior art 3 discloses a structure as shown in Figure 8, wherein the first and second rotating shafts are vertically and rotatably installed in the cylinder, and the shape of the cylinder is composed of two arc surfaces; and the stirring paddles on the second rotating shaft extend in three directions. Each of the three stirring paddles is flat plate-shaped, and two sets of paddles are arranged to rotate in opposite directions. In addition, the rotation trajectories of the stirring blades are tangential to each other. Although the dead zone problem can be solved, granular media and the like have a tendency to spin with the agitator blades. Then there arises a problem that the raw material of the pigment paste cannot be satisfactorily dispersed.

Prior Art 4 discloses a structure in which a large number of bumps and pits are distributed on the surface of the cylindrical first and second rotors; the rotor is installed in a cylinder whose shape is composed of two circular arcs composed of surfaces. The above-mentioned structure has a problem that the outer surface of the first rotor does not engage with the outer surface of the second rotor, so that the rotation trajectories of the rotors do not overlap, and the manufacturing process of the rotor becomes too complicated.

Prior art 5 discloses a structure in which a rotating shaft is vertically rotatably mounted at an eccentric position within a rotatable vertical cylindrical drum. In addition, the shaft has a set of discs with a set of holes near the outer edge. Since the above-mentioned structure is arranged so that the cylinder rotates, the rotating shaft installed in the eccentric part of the cylinder also rotates, which causes the problem that the whole structure becomes excessively complicated.

Summary of the invention

The present invention has been made in consideration of the above-mentioned problems. According to a first aspect of the present invention, a dispersing device is provided, which includes: first and second rotating shafts, which are installed in a cylinder, and the cylinder has a material inlet and a material outlet for loading and dispensing The materials to be dispersed are discharged, and the rotating shafts are parallel to each other and can be rotated; several stirring blades are arranged on the first and second rotating shafts at any mutual distance in the axial direction, and the stirring blades are staggered in the axial direction configured; and a granular medium for carrying out a dispersing process on the material, and enclosed in a cylinder, wherein a part of the rotation area of the agitating blades mounted on the first and second rotating shafts overlaps; the inner surface of the cylinder is composed of two circular The curved surface is formed along the outer rotating ends of the stirring paddles mounted on the first and second rotating shafts.

After adopting the above structure, when the first and second rotating shafts rotate, the materials to be dispersed are loaded from the feeding port on the cylinder, and the granular medium is stirred by the stirring blades in the cylinder. The dispersed material is then subjected to the dispersion process. Since the inner surface of the cylinder is formed by two arc surfaces, the rotating ends of the agitating blades installed along the first and second rotating shafts, and part of the rotating area of the agitating blades overlaps with each other, there will be no formation of granular media in the cylinder, which will cause the particle medium to fail. Satisfyingly agitated "dead zone". In addition, since the rotation directions of the first and second rotating shafts are made the same, in the rotation overlapping area of the stirring blades, the moving directions of the stirring blades on different rotating shafts are opposite. Therefore, the phenomenon that the granular media collide with each other to make them rotate in the same direction can be avoided. In the case where the first and second rotating shafts are made to rotate in opposite directions, the phenomenon that the granular media collide with each other to make them rotate together in the same direction can be stirred at the overlapping portion of the rotating area of the stirring blades. Therefore, the rotation direction of the second rotating shaft of the first type is not limited to the same rotation, preferably the same rotation.

Therefore, the material to be dispersed can be satisfactorily dispersed in the overlapping region of the rotating regions. Pigment particles can thus be further refined in a solvent. The concentration difference can be eliminated, and the pigment particles can be more uniform.

According to the second aspect of the present invention, as described in the first aspect, the present invention has the following structure: the first and second rotating shafts are installed horizontally, and the plane where the axes of the first and second rotating shafts are located is a vertical plane. Therefore, this structure mounts the first and second shafts in a vertical plane. Thus, the load of the granular medium in the upper shaft installation chamber acts on the granular media in the lower shaft installation chamber. In addition, the lower chamber is formed in a state of being filled with granular media. The dispersion process can thus be further efficiently carried out.

According to a third aspect of the present invention, as described in the first aspect, the present invention has the following structure, wherein the first and second rotating shafts are installed horizontally, and the plane where the axes of the first and second rotating shafts lie is a horizontal plane. Therefore, the first and second rotation shafts are adjacently installed in the horizontal direction. As a result, the amount of granular media in the first shaft-mounted chamber and the second shaft-mounted chamber is substantially in phase, and the material to be dispersed can easily be allowed to meander in each chamber. Thus, the distance that the material to be dispersed moves from the feed port to the discharge port can be lengthened, so that the dispersion process can be fully implemented.

According to the fourth aspect of the present invention, as described in the first aspect, the present invention has the following structure, wherein the first and second rotating shafts are installed horizontally, and the planes where the axes of the first and second rotating shafts are located can be vertically and Transition between horizontal states. Therefore, the positional relationship between the first and second rotating shafts can be changed between two states of being in the same vertical plane and in the same horizontal plane. As a result, the characteristics of both states can be effectively utilized to implement the dispersion process.

According to a fifth aspect of the present invention, as described in the first aspect, the present invention has the following structure, wherein the first and second rotating shafts are installed vertically, and the plane where the axes of the first and second rotating shafts are located is a vertical plane. Therefore, the two chambers in which the first and second shafts are installed are placed vertically. Thus, the amount of the granular medium is substantially the same in the first shaft-mounting chamber and the second shaft-mounting chamber, and the material to be dispersed can easily be allowed to meander in each chamber. As a result, similar results as those obtained in claim 3 of the present invention can be obtained.

According to a sixth aspect of the present invention, as described in one of the above aspects, the present invention has a structure wherein at least one plate-type paddle is provided to at least one of the first and second rotating shafts. Therefore, the plate paddle realizes a tendency to prevent the axial movement of the dispersed material, thereby enhancing the meandering movement of the dispersed material. As a result, zigzag motion can be effectively realized, and the distance over which the material to be dispersed can be moved can be increased, so that the dispersion process can be efficiently carried out.

According to the seventh aspect of the present invention, as described in one of the above-mentioned aspects, the present invention has the following structure, wherein, assuming that the radii of the first and second rotating shafts are rA and rB respectively, the radii of the first and second rotating shafts The radii of the stirring blades are RA and RB respectively, the distance between the first and second rotating shafts is L, and the relationship rB+RA=rA+RB<L≤0.9(RA+RB) holds true. In this way, a portion of the rotation area of the stirring paddles on the first and second shafts always overlaps. In this way, the phenomenon that the granular medium rotates together with the stirring blades can be avoided in the overlapping area.

According to an eighth aspect of the present invention, as described in one of the above-mentioned aspects, the present invention has the following structure, wherein the stirring blades rotate from the outer surfaces of the first and second rotating shafts to the first and second rotating shafts The distance from the outer end, and the distance from the rotating outer end of the stirring blade to the inner surface of the cylinder, is not less than 3 times the average diameter of the granular medium, and is not greater than about 10 times the average diameter of the granular medium. In this way, clogging of the space between the first and second rotating shafts and the stirring paddles, and between the stirring paddles and the inner wall of the drum, by the granular medium can be avoided. Furthermore, the problem of reduced quality of the dispersion process caused by excessively large gaps can be avoided.

According to a ninth aspect of the present invention, as claimed in one of the above-mentioned aspects, the present invention has a structure in which the rotation directions of the first and second rotating shafts are the same. Therefore, in the overlapping area of the rotation area of the stirring blades, the direction of movement of the stirring blades is opposite. As a result, the phenomenon that the granular medium rotates with the rotating shaft can be effectively avoided.

Brief introduction to the drawings

Fig. 1 is the sectional view of the dispersing device of the first embodiment of the present invention for illustrative purposes;

Fig. 2 is a sectional view along 2-2 of Fig. 1;

3 is a cross-sectional view of a dispersing device according to a second embodiment of the present invention for illustrative purposes;

Fig. 4 is a sectional view along 3-3 of Fig. 3;

5 is a cross-sectional view of a dispersing device according to a third embodiment of the present invention for illustrative purposes;

Fig. 6 is a diagram schematic diagram, in order to illustrate the dispersing device of the present invention and a comparative example;

Fig. 7 is the cross-sectional view of the first example of the dispersion device used in the prior art for illustration;

Fig. 8 is the cross-sectional view of the second example of the dispersion device used in the prior art for illustration;

Fig. 9 is the cross-sectional view of the 3rd example of the dispersing device used in the prior art for illustration; and

FIG. 10 is a cross-sectional view of FIG. 9 .

BEST MODE FOR CARRYING OUT THE INVENTION

Preferred embodiments of the present invention will be described with reference to the accompanying drawings.

Referring to Fig. 1 and Fig. 2, the dispersing device 1 of the first embodiment of the present invention has a cylinder 3 whose axis is horizontal. The cylinder 3 is equipped with first and second rotating shafts 5A and 5B, and the two rotating shafts are parallel to each other, installed horizontally, and can rotate. The first and second rotating shafts 5A and 5B have a set of cylindrical stirring blades 7A and 7B, which protrude and extend in the radial direction and are arranged at random intervals in the axial direction.

In particular, the inner surface of the cylinder 3, as shown in Figure 2, is formed by connecting arc surfaces 9A and 9B, and the two arc surfaces are arranged along the first and second rotating shafts 5A and 5B. The outer surfaces of 7A and 7B are formed. That is to say, the cross-sectional shape of the cylinder on which the first and second rotating shafts are installed is formed by connecting the first chamber and the second chamber 11A and 11B. The respective 3/4 of the two chambers are arc-shaped in nature, and their shape It is supercilium-shaped.

There is an outer wall 13 outside the tube 3, and the inner wall of the tube is arc-curved surfaces 9A and 9B. The cooling chamber 15C communicates with the cooling medium inlet 15A and the cooling medium outlet 15B, and the cooling medium passes between the inner wall and the outer wall 13 . Pigment slurry raw material inlet 17 is arranged on the first cover-shaped part 19; This raw material, for example is that powdery pigment is dispersed in varnish or solvent with high concentration; Firmware (not shown in the figure) is contained in one end of cylinder 3.

At the other end of the barrel 3, with selected fasteners, a cover-shaped member 21 is detachably mounted, on which are horizontally mounted rotatable first and second shafts 5A and 5B. Between the second cover-shaped member 21 and the cylinder 3, a mesh or grid-shaped granular medium separation mechanism is provided to separate the granular medium 25 filled in the cylinder 3 from the material (pigment slurry) subjected to dispersion.

The granular medium 25 is, for example, spherical, flat or amorphous steel, ceramics, crystals or the like. In the case of spherical media, media with an average particle size of 0.2 mm to 15 mm are used. The filling rate of the granular medium 25 into the cylinder 3 is 70%-95%.

Although the first and second rotary shafts 5A and 5B have cooling medium passages through which cooling medium can circulate, such cooling medium passages are not always necessary. According to this embodiment, the stirring paddles 7A and 7B on the first and second rotating shafts 5A and 5B are cross-shaped protrusions mounted radially by four cylinders. The number of cylinders is not limited to 4, and can be any number; the truncation of each column is not limited to cylinder, and can be any other shape.

The stirring paddles 7A and 7B on the first and second rotating shafts 5A and 5B, as shown in FIG. 1 , can be axially staggeredly installed on the first and second rotating shafts 5A and 5B. In addition, the rotation areas 29A and 29B of the agitating blades 7A and 7B, as shown in FIG. 2 , are partially overlapped.

The first and second rotating shafts 5A and 5B are driven by the same motor (not shown). make it rotate in the same direction. At this time, the peripheral speed of each stirring blade 7A and 7B is preferably 6m/s-17m/s, and the peripheral speed of the two sets of blades is the same.

In the above structure, the radii of the first and second rotating shafts 5A and 5B are rA and rB respectively, the rotation radii of the stirring blades 7A and 7B are respectively RA and RB, and the center distance between the first rotating shaft 5A and the second rotating shaft 5B is L, then the relationship rB+RA=rA+RB<L≤0.9(RA+RB) is established. From the respective outer surfaces of the first and second rotating shafts 5A and 5B, the distance to the outer surfaces when the stirring blades 7A and 7B rotate, and the outer surfaces when the stirring blades 7A and 7B rotate, to the inner surface of the cylinder 3 The distance is not less than 3 times the average diameter of the granular medium 25 and is not greater than about 10 times the average diameter of the granular medium.

Therefore, the granular medium 25 will not be blocked between the stirring blades 7A and 7B and the first and second rotating shafts 5A and 5B, and between the stirring blades and the inner surfaces 9A and 9B of the first and second chambers 11A and 11B. . In addition, the problems of agitation efficiency and similar reduction in work quality due to an excessively large distance between the agitation blades 7A and 7B and the inner surfaces 9A and 9B can be avoided.

In the above structure, when the first and second rotating shafts 5A and 5B rotate in the same direction, the pigment paste raw material (material to be dispersed) is sent into the cylinder 3 through the feed port 17, and the granular medium 25 in the cylinder 3 moves and is Agitation blades 7A and 7B assembled on the first and second rotating shafts 5A and 5B agitate. Thus, the material to be dispersed is brought into a state of being mixed with the granular medium 25, so that the dispersion process is carried out.

At this time, the materials to be dispersed can alternately meander in the first and second inner cavities 11A and 11B, and the first and second rotating shafts 5A and 5B in the cavities are installed to rotate the stirring blades 7A and 7B. Therefore, its movement distance increases. As a result of the rotation of the stirring blades 7A and 7B, the granular medium 25 in the chamber 3 has a tendency to follow the stirring blades and thereby rotate together with them. At the overlapping portion of the rotation areas 29A and 29B of the stirring blades 7A and 7B, since the moving directions of the stirring blades 7A and 7B are opposite, the granular media 25 collide with each other. As a result, aggregate rotation is effectively avoided. As a result, the material to be dispersed can be dispersed more efficiently in the overlapping area.

The material to be dispersed is separated from the granular medium 25 by the granular medium separation mechanism 27 after the dispersion process is carried out, and then discharged out of the cylinder from the discharge port 23 .

It can be understood from the above description that the material to be dispersed moves zigzagging alternately in the first and second inner chambers 11A and 11B, thereby lengthening its moving path. In addition, the material to be dispersed collides with the granular medium 25 at the overlapping portions of the rotation areas of the first and second stirring blades 7A and 7B. In this way, agitation can be efficiently performed, thereby reducing the amount of particulate media 25 that must be charged.

In order to confirm the dispersing effect of the dispersing device having the above structure, a comparative test was carried out. (Test example)

Samples 1 to 7 and Comparative Samples 1 to 7

Pigment (12 parts by weight), alkyd resin (38 parts by weight) and xylene (40 parts by weight) are mixed according to the above ratio, and then carried out with the dispersing device according to the present invention with the structure shown in Fig. 1 and Fig. 2 dispersion. The result is a dispersed pigment paste. A kind of alkyd/melamine coating material is prepared by mixing melamine resin (12 parts by weight) with dispersed pigment slurry (88 parts by weight). As the coating material of the comparative sample, the raw material having the same composition as that of the above-mentioned sample was obtained by simultaneously dispersing the raw material with a commonly used dispersing device with a single-shaft sand mill structure as shown in FIG. 7 . The result of measuring the particle size distribution shows that the particle size of the pigment obtained by the dispersing device according to the present invention is smaller than the particle size of the pigment obtained by the dispersing device used in the comparative test, and the data are shown in Table 1. As a result, the best dispersion characteristics are revealed.

Use the above-mentioned coating material with titanium oxide slurry coating material (this is a glue paste, in which titanium oxide is dispersed; this material is obtained by dispersing titanium oxide in alkyd/melamine at 50PHR) Diluted to a state in which the ratio of pigment to titanium oxide is 1/10, thus preparing a light-color coating material. This light coat material is used to tint on art paper using a 6mm film applicator and then allowed to stand for 10 minutes. After each coating film was baked at 140° C. for 30 minutes, its coloring ability was measured. The coloring ability is obtained according to the measured color difference value DL, wherein the comparative sample is used as a reference, assuming that the coloring ability of the comparative sample is 100, and the coloring ability of the test piece is expressed as: (100-DL×10). As shown in Table 1, the coating film prepared with the dispersing device according to the present invention showed stronger coloring ability than the coating film prepared with the dispersing device used in the comparative sample.

The viscosity of each coating material is prepared according to the standard of 4# Ford viscosity cup for 20 seconds, and then this coating material is applied to an intermediate coating plate (a steel plate, only applying a layer of primer material, and then coating light) to obtain a dry film thickness of approximately 30mm; apply using an air spray gun and allow to stand for 10 minutes. The film was then baked at 140°C for 30 minutes. The color and luster of the coated plate was measured, and the result was that the coated plate obtained by using the dispersion device of the present invention, compared with the coated plate obtained by the device used for the comparative sample, showed excellent coating film gloss as shown in Table 1 Show.

(Table 1) sample pigment Particle size distribution D50(μm) coloring ability luster(%) 20°G 60°G Comparative sample 1 Color Index Pigment Red 177 (Anthraquinone Pigment) 0.20 100 45.8 75.5 Sample 1 0.12 110 77.9 85.4 Comparative sample 2 Color index pigment violet 19 (quinacridone pigment) 0.32 100 55.4 78.8 Sample 2 0.22 115 80.6 88.4 Comparative sample 3 Color index pigment red 178 (perylene pigment) 0.27 100 60.9 79.5 Sample 3 0.19 112 82.0 89.8 Comparative sample 4 Color index pigment blue 15:1 (phthalocyanine pigment) 0.31 100 61.4 80.3 Sample 4 0.24 118 83.5 91.5 Comparative sample 5 Color Index Pigment Violet 23 (Dioxazine Pigment) 0.25 100 60.5 79.1 Sample 5 0.18 108 81.1 88.0 Comparative sample 6 Color Index Pigment Red 254 (Diketopyrrolopyrrole Pigment) 0.36 100 54.0 76.5 Sample 6 0.25 112 79.5 85.9 Comparative sample 7 Color index pigment red 101 (inorganic pigment) 0.20 100 70.3 85.2 Sample 7 0.11 110 80.7 93.0

Gloss: gloss grades at 20° and 60° angles

When compared with dispersing devices with the same capacity, the performance of the dispersing device of the present invention in producing printing ink pigment slurry has been improved by 50%.

3 and 4 show a dispersion device 1A according to a second embodiment of the present invention. The dispersing device 1A has a cylinder 3A, which has the same cross-sectional shape as the cylinder 3 in the first embodiment, and is placed vertically. The feed port 17A is located in the upper part of the barrel 3 . In addition, the discharge port 111, the granular medium separation mechanism 113 and the valve 115 respectively have structures similar to those commonly used, and are installed at the bottom of the cylinder. Since other structures are essentially similar to those of the first embodiment, elements with the same functions are marked with the same numerals, and similar parts are omitted in illustrations.

In the second embodiment, the cylinder 3A is arranged perpendicular to the axes of the first and second rotation shafts 5A and 5B. Furthermore, the plane containing the first and second shaft axes 5A and 5B is a vertical plane. Therefore, the first and second chambers 11A and 11B in which the first and second rotation shafts 5A and 5B are mounted are adjacently arranged in the horizontal direction. As a result, the amount of particulate media in the first and second chambers 11A and 11B is substantially the same. The material to be dispersed entering the cylinder 3A from the feed port 17A zigzags in the first and second chambers 11A and 11B, and finally reaches the discharge port 111 . As a result, effects similar to those obtained in the first embodiment can be obtained.

In order to confirm the effect of the dispersing device according to the second embodiment, a comparative test was carried out. (Test example)

Samples 1 to 7 and Comparative Samples 1 to 7

Pigment (12 parts by weight), alkyd resin (38 parts by weight) and xylene (40 parts by weight) are mixed according to the above ratio, and then carried out with the dispersing device according to the present invention with the structure shown in Figure 3 and Figure 4 dispersion. The result is a dispersed pigment paste. A kind of alkyd/melamine coating material is prepared by mixing melamine resin (12 parts by weight) with dispersed pigment slurry (88 parts by weight). The coating material of the comparative sample is obtained by simultaneously dispersing the raw materials having the same composition as the above-mentioned sample by using a commonly used dispersing device with a single-shaft sand mill structure as shown in FIG. 8 . The result of measuring the particle size distribution shows that the particle size of the pigment obtained by the dispersing device according to the present invention is smaller than that obtained by the dispersing device used in the comparative test, and the data are shown in Table 2. As a result, the best dispersion characteristics are revealed.

(Table 2) sample pigment Particle size distribution D50(μ) coloring ability Comparative sample 1 Color Index Pigment Red 177 (Anthraquinone Pigment) 0.25 100 Sample 1 0.20 107 Comparative sample 2 Color index pigment violet 19 (quinacridone pigment) 0.37 100 Sample 2 0.27 112 Comparative sample 3 Color index pigment red 178 (perylene pigment) 0.31 100 Sample 3 0.23 108 Comparative sample 4 Color index pigment blue 15:1 (phthalocyanine pigment) 0.36 100 Sample 4 0.28 115 Comparative sample 5 Color Index Pigment Violet 23 (Dioxazine Pigment) 0.30 100 Sample 5 0.24 106 Comparative sample 6 Color Index Pigment Red 254 (Diketopyrrolopyrrole Pigment) 0.39 100 Sample 6 0.29 110 Comparative sample 7 Color index pigment red 101 (inorganic pigment) 0.25 100 Sample 7 0.17 108

The above coating material is coated with titanium oxide slurry coating material (this is a kind of glue paste, titanium oxide is dispersed in it, this material is obtained by dispersing titanium oxide in alkyd/melamine according to 50PHR) It was diluted to a state in which the ratio of pigment to titanium oxide was 1/10, and a light-colored coating material was prepared. This light coat material is used to tint on art paper using a 6mm film applicator and then allowed to stand for 10 minutes. After each coating film was baked at 140° C. for 30 minutes, its coloring ability was measured. The coloring ability is obtained according to the measured color difference value DL, wherein the comparative sample is used as a reference, assuming that the coloring ability of the comparative sample is 100, and the coloring ability of the test piece is expressed as (100-DL×10). As shown in Table 2, the coating film prepared with the dispersing device according to the present invention showed stronger coloring ability than the coating film prepared with the dispersing device used in the comparative sample.

When comparing with dispersing devices with the same capacity. The dispersing device of the present invention improves the performance of printing ink pigment slurry by 50%.

The dispersing device 1 shown in Fig. 1 and Fig. 2 has the following structure: the plane containing the axes of the first and second rotating shafts 5A and 5B is a horizontal plane, and the first and second chambers 11A and 11A of the first and second rotating shafts 5A and 5B are installed. 11B is a horizontal configuration. Another structure may be employed in which the plane containing the axes of the first and second rotation shafts 5A and 5B is a vertical plane. That is, the first and second chambers 11A and 11B in which the first and second rotation shafts 5A and 5B are installed may be arranged in a vertical plane.

With the above structure, the lower chamber of the cartridge is filled with the granular medium, and the weight of the granular medium acts on the granular medium in the lower chamber, so that the dispersion process can be carried out more efficiently in the lower chamber.

It can be understood from the above description that the plane containing the axes of the first and second rotating shafts 5A and 5B can be placed horizontally or vertically. Therefore, a structure is adopted in which the cylinder is rotatable about its horizontal axis so that the plane containing the axes of the first and second rotation shafts 5A and 5B can be changed between the horizontal state and the vertical state. The relationship of the cartridge's first and second chambers 11A and 11B within the cartridge can be reversed.

In the above case, the positional relationship of the first and second chambers 11A and 11B in the cartridge can be changed between horizontal and vertical positions. Therefore, it is possible to implement the dispersion process by utilizing the features of the first and second chambers 11A and 11B being constructed horizontally and vertically.

Figure 5 shows a third embodiment. The third embodiment has substantially the same structure as the first embodiment shown in FIGS. 1 and 2 . The difference is that the discs 31A and 31B are installed on the first and second rotating shafts 5A and 5B at random axial distances respectively, so that the material to be dispersed that enters the barrel from the feed port 17 moves along the first and second rotating shafts. This short-circuit problem in which the rotating shaft moves in one direction can be avoided. Furthermore, the tendency of the material to be dispersed to meander in the first and second chambers 11A and 11B is enhanced. Since the other structures of this embodiment are the same as the corresponding structures in the first embodiment of the present invention, elements with the same functions are marked with the same numbers, and repeated descriptions are omitted.

With the above-mentioned structure, the material to be dispersed, which enters the cylinder 3 through the feed port 17, is reliably prevented from moving linearly toward the discharge port 23 by the discs 31A and 31B. Since the material to be dispersed zigzags in the first and second chambers 11A and 11B to the discharge port 23, the distance over which the material is subjected to the dispersing operation increases. The dispersion process can thus be carried out more efficiently.

It can be understood from the above description that the structure shown in FIG. 5 can be arranged in such a way that the positional relationship between the first and second rotating shafts 5A and 5B is that the two axes are in the same vertical plane.

Adopt the comparative test sample that has the dispersing device of (A) and (B) structure among Fig. 6 respectively, and adopt and have the present invention (C), (C '), (D), (D ') and (E) structure The test results of the test samples made by the dispersing device are listed in Table 3. It was confirmed that the dispersing apparatus according to the present invention satisfactorily performed the dispersing process.

Note that the letters (A), (B), (C), (D), (E), (C') and (D') of the dispersing device type in Table 3 refer to the dispersing device shown in Figure 6 The schematic drawing number.

Among Fig. 6, (A) type corresponds to the structure shown in Fig. 7, and (B) type has such structure, and wherein, first and second rotating shaft 5A and 5B are installed in horizontal position; Tube is cylindrical; The rotation areas of the stirring paddles 7A and 7B on the two rotating shafts do not overlap. Types (A) and (B) are structures used as test pieces for comparative tests.

In FIG. 6, type (C) has a structure corresponding to that of the dispersing device shown in FIGS. 1 and 2 . (D) type corresponds to the structure formed by turning (C) type structure by 90 °. Type (E) corresponds to the structure of the dispersing device shown in FIGS. 3 and 4 . (C') type corresponds to the structure of the dispersing device shown in Figure 5, and has as (C) type on the equipped disc blade. (D') type corresponds to the structure formed by turning (C') type by 90°, and has a disc equipped for (D) type.

(table 3) sample Dispersion device type pigment Particle size distribution D50(μm) coloring ability luster(%) 20°G 60°G Comparative sample 1 (A) Color index pigment blue 15:1 (phthalocyanine pigment) 0.31 100 61.4 80.3 Comparative sample 2 (B) 0.30 102 63.0 85.0 Sample 1 (C) 0.24 118 83.5 91.5 Sample 2 (D) 0.23 120 83.7 92.0 Sample 3 (E) 0.28 115 81.0 86.5 Sample 3 (C') 0.21 120 84.3 92.0 Sample 4 (D') 0.20 121 84.5 92.3 Comparative sample 1 (A) Quinacridone (quinacridone pigment 0.32 100 55.4 78.8 Comparative sample 3 (B) 0.30 103 57.0 79.5 Sample 6 (C) 0.22 115 80.6 88.4 Sample 7 (D) 0.19 118 80.8 88.7

Although the invention has been described in terms of its best form, the invention is not limited to the form of the above embodiments and the best form disclosed may vary.

That is to say, in the above descriptions of the embodiments, the first and second rotating shafts rotate in the same direction. Preferably they rotate in the same direction, however, the first and second shafts may rotate in opposite directions. Another configuration is also possible in which the rotation of the first and second shafts is alternately repeated at random intervals between co-rotation and counter-rotation.

The structures shown in Figures 1 and 3 may be arranged in such a way that a circular arc interference plate is used to prevent the material to be dispersed from moving linearly along the inner wall of the cylinder. The inside is slightly raised to avoid interference with the stirring blades.

Where the first and second rotating shafts are configured with cylindrical paddles, a set of disc-shaped stirring blades can be installed. In the above case, the disc-shaped stirring blade may have a set of through holes, the size and shape of each hole are different, or the holes may be omitted. In addition, some disc-shaped paddles may have through holes and some discs may not have through holes.

In addition, the rotation radii of the first and second stirring paddles on the first and second rotating shafts can also be made different. Industrial Applicability

As can be understood from the description of the various embodiments, as described in the first aspect of the present invention, when the first and second rotating shafts rotate, the material to be dispersed enters the barrel through the feed port, and the granular medium is stirred The paddles are agitated, thus implementing the process of dispersing the material. Since the inner wall of the cylinder is formed by two arc surfaces along the rotating ends of the stirring paddles arranged on the first and second rotating shafts, and the rotating areas of the stirring paddles partially overlap, the dead zone where the granular medium is not easily stirred will not Generated inside the barrel. Since the first and second rotating shafts are made to rotate in the same direction, the moving directions of the stirring blades on the two shafts are opposite to each other in the overlapping area of the rotating area of the stirring blades. Therefore, the collision of the granular medium and the phenomenon that it rotates with the rotating shaft can be avoided.

As a result, the process of dispersing the material can be efficiently carried out, the pigment particles in the solvent can be further refined, the concentration difference can be eliminated, and the pigment particles can be made uniform.

As stated in the second aspect of the present invention, the load of the granular medium in the upper chamber where the upper shaft is installed acts on the granular media in the lower chamber where the lower shaft is installed. In addition, the lower cavity is filled with granular media. Therefore, the dispersion process can be further efficiently carried out.

As described in the third aspect of the present invention, the amount of granular media contained in the first and second shaft chambers is substantially the same, and the material to be dispersed can be easily allowed to meander in each chamber. In this way, the movement distance of the material to be dispersed from the feed port to the discharge port can be increased, and the dispersion process can be fully performed.

As stated in the fourth aspect of the present invention, the positional relationship between the first and second rotating shafts can be changed between a vertical state and a horizontal state. As a result, the characteristics of both states can be used to effectively implement the dispersion process.

As described in the fifth aspect of the present invention, the lumens for installing the first and second rotating shafts are arranged vertically, the quantity of granular media in the inner chambers for installing the first and second rotating shafts is substantially the same, and the materials to be dispersed Easily allows meandering motion in each cavity. As a result, the moving distance of the material to be dispersed can be increased, and thus the regenerated particles can be more efficiently dispersed.

As described in the sixth aspect of the present invention, the plate-type paddle can prevent the tendency of the material to be dispersed to move along the rotating shaft, and the meandering movement of the material to be dispersed can be enhanced. As a result, meandering motions can be efficiently realized and dispersion processes can be effectively implemented.

As described in the seventh aspect of the present invention, the rotation areas of the stirring blades of the first and second shafts always partially overlap. In this way, the phenomenon that the granular medium rotates together with the stirring blades is avoided in the overlapping area.

As described in the eighth aspect of the present invention, the clogging of the granular medium between the first and second rotating shafts and the agitating blades, and the clogging between the agitating blades and the inner wall of the cylinder can be avoided. Furthermore, deterioration of the dispersion process attributable to excessively large gaps can be avoided.

As described in the ninth aspect of the present invention, the direction of motion of the stirring blades is designed so that in the overlapping area of the rotation area, the direction of motion of the blades is opposite. As a result, the phenomenon that the granular medium rotates with the rotating shaft can be avoided.

Claims (7)

1. dispersal device comprises:

A tube, this has charging aperture and the discharging opening of using for the material of preparing to disperse;

First and second rotating shafts, this rotating shaft are loaded in the described tube, are parallel to each other, and rotatable;

Several stirrer paddles, this blade are contained in described first and second rotating shafts, axially dispose alternately with spacing arbitrarily along rotating shaft; With

Granule medium, this granule medium are packaged in the described tube in order to described material is implemented dispersion process;

Wherein,

The rotary area of the described stirrer paddle in described first and second rotating shafts is overlapped;

The inwall of described tube is made up of two circular arc cambers, and these two circular arc cambers form along the rotation outer end of the described stirring blade in described first and second rotating shafts;

The described first and second rotating shaft levels are installed; With

The plane at the described first and second shaft axis places is a vertical plane.

2. dispersal device comprises:

A tube, this has charging aperture and the discharging opening of using for the material of preparing to disperse;

First and second rotating shafts, this rotating shaft are loaded in the described tube, are parallel to each other, and rotatable;

Several stirrer paddles, this blade are contained in described first and second rotating shafts, axially dispose alternately with spacing arbitrarily along rotating shaft; With

Granule medium, this granule medium are packaged in the described tube in order to described material is implemented dispersion process;

Wherein,

The rotary area of the described stirrer paddle in described first and second rotating shafts is overlapped;

The inwall of described tube is made up of two circular arc cambers, and these two circular arc cambers form along the rotation outer end of the described stirrer paddle in described first and second rotating shafts;

The described first and second rotating shaft levels are installed; With

The plane at the described first and second shaft axis places is a horizontal plane.

3. dispersal device comprises:

A tube, this has charging aperture and the discharging opening of using for the material of preparing to disperse;

First and second rotating shafts, this rotating shaft are loaded in the described tube, are parallel to each other, and rotatable;

Several stirrer paddles, this blade are contained in described first and second rotating shafts, axially dispose alternately with spacing arbitrarily along rotating shaft; With

Granule medium, this granule medium are packaged in the described tube in order to described material is implemented dispersion process;

Wherein,

The rotary area of the described stirrer paddle in described first and second rotating shafts is overlapped;

The inwall of described tube is made up of two circular arc cambers, and these two circular arc cambers form along the rotation outer end of the described stirrer paddle in described first and second rotating shafts;

The described first and second rotating shaft levels are installed; With

The plane at the described first and second shaft axis places can be changed being in plumbness and being between the level.

4. as claim 1,2 and 3 one of them described dispersal device, wherein,

Have at least a board-like blade to be provided on arbitrary at least axle of described first and second rotating shafts.

5. as claim 1,2 and 3 one of them described dispersal device, wherein,

If the radius of described first and second rotating shafts is respectively rA and rB, the radius of turn of the described stirrer paddle of described first and second rotating shafts is respectively RA and RB, and the distance of shaft centers of described first and second rotating shafts is L, relational expression

Set up rB+RA=rA+RB＜L≤0.9 (RA+RB).

6. as claim 1,2 and 3 one of them described dispersal device, wherein,

The distance of the described stirrer paddle rotation outer end of the outer surface of described first and second rotating shafts to described first and second rotating shafts and the rotation outer end of described stirrer paddle are to the distance between the inner surface of described tube, be not less than three times of described granule medium average diameter, and be not more than about 10 times of this granule medium average diameter.

7. as claim 1,2 and 3 one of them described dispersal device, wherein,

The direction of rotation of described first and second rotating shafts is identical.

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