DE60315540T2 - Apparatus and method for dispersing - Google Patents

Description

Background of the invention

Field of the invention

The The present invention relates to a dispersing device and a dispersion method which is used to finely disperse, move and the like from a series of dispersions or grinding mixtures, for example paint, Printing ink, medicines, foods or the like for dispersion processing is used.

Description of the technical territory

Before the were in the fields of paint, printing ink, medicines, food and the like one Series of dispersions which are materials, a dispersion processing, such as moving or Agitieren, Feinstverteilen, fine Mixing or the like subjected to the manufacture of finished products.

Under this is used in the field of printing ink pigment in a binder dispersed, which is formed from resin together with varnish, additives and solvents, to produce a base ink with a high pigment concentration, which then diluted to make the finished ink. For example, in the case a base ink of comparatively high viscosity typically becomes ground base in which pigment, varnish, solvents and the like mixed by a bead mill, a roller mill, or similar ground, additives or similar are added and then a setting for made a preparation.

If the base ink is ground, it affects the stability quality, such as Density, gloss, transparency and printability disadvantageous when the Dispersion of the pigment insufficient is. Since dispersing devices are used in milling processes, is the productivity of roll mills and ball mills bad, because these are not continuous systems, and in particular have roll mills also safety and work environment issues.

on the other hand brings a dispersing device, such as a media agitator mill or the like, a lot of grainy Media in a cylinder underneath, and ground base ink, the crude Ink is, is incorporated, and will be together with the granular Media through motion elements, such as pens, on a rotating shaft, washers or the like are installed, for a Dispersing mixing moves or agitated. The granular media, which are moved and dispersed in the cylinder, crush and refine ground base ink, thus dispersing and Milling away, so that has an advantage that productivity is high, consists.

It are vertical cylindrical and horizontal cylindrical media agitator mills. The vertically cylindrical has a high load on its axis of rotation in a dispersion method of base ink with comparatively high viscosity, when the device is started, and the dispersion efficiency of ground base ink drops due to congestion of granular media, and a phenomenon that Clogging is called, which occurs when granular media near from the ink outlet side, so there is a defect that a stable operation is not possible.

on the other hand In recent years, the horizontal cylinder-like has been popular since it has no defect as described above. At a horizontal Cylindrical dispersing device is the driving torque low, and maintenance of the cylinder and a rotating shaft is simple, so that there is an advantage that the device is inexpensive is.

An example of such a horizontal cylinder-like is a kind of media agitator mill, which in a Japanese Unexamined Patent Application, First Publication No. 9-225279 is disclosed.

This media agitator type mill has a structure as in FIG 9 shown on. This mill 1 has pearls 6 in advance as media in a cylinder 2 be loaded, a rotating shaft 3 and also movement discs 4 which are fixed at predetermined intervals along the rotating shaft. In the movement discs 4 For example, cut recesses having a width through which the beads can pass are formed at predetermined intervals, and there are open holes through which Beads can pass in the cut recesses.

In this mixed media mill 1 is when a dispersion, such as ground base ink or the like, from an inlet 5 is fed, the dispersion crushed and together with the beads 6 by the rotation of the rotating shaft 3 and the mixing discs 4 dispersed. When using this mill 1 Especially when the dispersion has a high viscosity or the amount that promotes compression is large, the beads 6 to the outlet side of the cylinder 2 pressed by the supply of dispersion, and the dispersion is discharged through an opening in the outlet, but the beads 6 accumulate near the outlet. After that lead the pearls 6 make a circular motion by passing through the rotating shaft 3 and through the mixing discs 4 be scattered, and to the inlet side through the open holes of the mixing discs 4 be transferred. Even if the dispersion has a high viscosity and the compression-promoting amount is large, the beads become 6 thus prevented from being unevenly distributed on the outlet side, and they are circulated, thus enabling the dispersion to be crushed and dispersed.

However, in such a media-mix type mill 1 when the outer diameter of the rotating shaft 3 D1 is and the inner diameter of the cylinder 2 D2, the ratio D1 / D2 is set to 0.3 or less, and the peripheral speed around the outer peripheral surface of the rotating shaft 3 is comparatively low. Thus, there is only a slight movement of the beads 6 , and the capacity of the cremation chamber (grinding area), which passes through the inner surface of the cylinder 2 , the rotating shaft 3 and the movement discs 4 is formed, is big. Consequently, the distance between the rotating shaft 3 and the cylinder 2 as in 10 shown great, and the movement of the pearls 6 is low, resulting in a significant decrease in fluidity, especially a dispersion with high viscoelasticity. Further, in the vicinity of the inner cylinder wall, since the agitation efficiency is low, clusters of the dispersion and the beads become 6 formed, which easily adhere, so that there is a defect that a stable operation of the rotating shaft Be 3 due to dispersion failure and increasing the load is not possible.

In particular, in a high-viscosity dispersion whose viscosity is 5000 mPa · s or more, the stress is large, so that the flowability of the beads 6 is prevented, and a phenomenon called corotation, in which an accumulation of pearls 6 and dispersion together with the rotating shaft 3 and the movement discs 4 flows, can occur. Consequently, there is a disadvantage of a high load on the rotating shaft 3 , and that the dispersion process can not be continued, so that a defect becomes possible in which a processed dispersion solution does not come out of the cylinder.

Furthermore, the Japanese Unexamined Patent Application, First Publication No. 6-114254 a technique in which a throttle valve is placed on the discharge side of a cylinder, and the inside of the cylinder for dispersion processing is pressurized by tightening the valve. The occurrence of a short passage of the dispersion is suppressed to some degree by increasing the internal pressure. However, it causes heating by friction, and a rapid increase in the load of the shaft due to excessive contact of the granular media, so that there are disadvantages that the physical properties of the dispersion are adversely affected or stable operation is not possible, or the like. In addition, it leads to a defect that the uniformity of the dispersion conditions of the dispersion is lost. EP 0 704 245 discloses a pulverizing method with a horizontal mill having a diameter of the pulverizing media in the range of 5-15 mm, and having a ratio of an inner diameter of the outer sleeve to the outer diameter of the inner sleeve of not less than 0.5 ,

Summary of the invention

The The present invention contemplates such a situation Task, a dispersing device and a dispersion method to provide an efficient dispersion processing allow a processing material, without an increase to cause the driving force.

According to the invention the above objects of a dispersing device as defined in claim 1 and a dispersion method such as defined in claim 7 defined. Define the dependent claims advantageous and preferred embodiments the invention.

According to one aspect of the invention, rotors are provided in a cylinder, and moving elements projecting radially from the rotors become at predetermined intervals in the longitudinal direction direction of the rotors, and when dispersing processing by moving the processing material introduced into the cylinder is performed together with media, a ratio D1 / D2 between an outer diameter D1 of the rotors installed in the cylinder, and a inner diameter D2 of the cylinder is set in a range of 0.4 to 0.7.

There the outer diameter D1 of the rotors is large, is a high kinetic energy to the media around the outer edge of the Rotors when turning passed, which causes the beads and the processing material located near the inner periphery of the Pile up cylinders, collide and disperse, and loss of movement may occur be reduced, so that the dispersion process of crushing and moving the processing material in the cylinder efficiently accomplished can be, although the capacity of the cylinder is reduced. Thus, both the build quality and productivity be improved. Furthermore, there is no increase in the processing Driving force needed.

Detailed description of the preferred embodiments

A Dispersing device according to the invention is a dispersion device in which rotors in a Cylinder and several elements of motion, which from the rotors in projecting radial direction at predetermined intervals along a longitudinal direction the rotors are placed, and processing material, which is inserted into the cylinder is moved together with media or agitated to disperse the processing material, wherein the outer diameter of the rotors D1 is the inner diameter of the cylinder D2 and a relationship D1 / D2 is set in a range of 0.4 to 0.7.

If the rotors are rotated in the cylinder, it is because the outer diameter D1 of the rotor is large, possible, to disperse the processing material by placing the media around the outer peripheral surface of the Rotor is given a high kinetic energy, and by causing that the media with the beads (media) and the processing material, that is in the vicinity the inner periphery of the cylinder accumulates, thus colliding allows is that a loss of movement is reduced, and there that Processing material is supplied to the cylinder continuously, can the dispersion processing by crushing and moving the processing material in the cylinder are efficiently performed, although the capacity of the cylinder is reduced. If the ratio D1 / D2 is below 0.4, is a loss of granular media kinetic energy, the the increase the distance between the rotor and the cylinder is accompanied, high, resulting in a brief passage of the processing material and poor dispersion leads. Consequently There is a disadvantage of decreasing processing efficiency. On the other hand, if the ratio D1 / D2 0.7 exceeds, is the difference in size between the outer diameter the rotors and the motion elements too low. Thus arise many defects, such as an inability to get a sufficient effect from the movement elements and simply causing overcrowding due to a bad one Flow of the media.

The Processing material may be a dispersion or a Mahlansatz or a processing liquid, such as printing ink or the like.

Of Further may be a ratio D1 / P between the arrangement pitch P of the moving elements and the outer diameter D1 of the rotors are set in a range of 1.4 to 3.0, so that the movement of media in the cylinder is good, and that the processing material, which is introduced into this, in a Kind of laminar flow flows, so the build quality is improved. If it is 1.4 or higher, then the distance is between the movement elements not too big, causing a drop in movement prevents the media, and thus a sufficient crushing and dispersing of the processing material. About that In addition, if it is 3.0 or less, then the distance is between the motion elements are not too low, and does not cause that the media are distributed unevenly or abort, and thus a stable operation is enabled.

In addition, must the arrangement pitch P of the moving elements is not always a fixed one Distance may be, and the distance may vary depending on the type of processing material changed become. For example, when going from the inlet to the outlet reduced, it is possible the dispersing force gradually to reinforce.

A cooling device may be provided in the rotor, and moreover, a cooling device may be provided outside the cylinder, which prevents the physical intrinsic It is particularly useful for processing materials whose properties change slightly with temperature, such as gravure ink or the like.

The moving elements may be a plurality of pins that are external to a rotating shaft, as in 7 are shown, or discs, in particular discs, which are provided with a plurality of holes (through holes), as shown in 6 shown installed on a rotating shaft. Considering prevention of rapid passage in which the media is uniformly dispersed in the processing chamber and circulated properly, a type of disk having a plurality of recess openings in the outer periphery of the disk other than the plurality of through holes is preferred.

Especially in the case where the viscosity of the processing material is high, the number of notch recesses is 3 to 15, and preferably 4 to 12 to let the media flow quickly and the circulation force to increase, although it is of the capacity the cremation chamber depends. About that In addition, the number of through holes is preferably about 3 to 8th.

One Dispersion process according to the invention is characterized in that rotors and moving elements, the outside of the rotors protrude in a radial direction, in a cylinder be provided, wherein an outer diameter of the rotors D1 is an inner diameter of the cylinder D2, a ratio of D1 / D2 is set in a range of 0.4 to 0.7, a dispersion, represents the processing material, introduced into the cylinder and the rotors and moving elements are rotated around the Dispersion together with the media for the purpose of dispersion processing to move.

If the viscosity of the processing material is high or the viscosity of the processing material is low is, is it possible Dispersion processing of the processing material efficient perform, because the processing material and the media when the marginal speed the rotors increase and the distance between the rotors and the inner peripheral surface is small becomes the inner peripheral surface of the cylinder in a state in which the kinetic energy to Scattering the media is high and a loss is low, colliding. Furthermore, it is also possible a local congestion of the media and a clogging phenomenon tend to occur in the case of low viscosity, to suppress.

In addition, where an arrangement pitch of the moving elements is P, a ratio with the outer diameter D1 of the rotors, D1 / P, set in a range of 1.4 to 3.0 and this makes it possible that the dispersion processing of the processing material is continued more reliably.

Brief description of the drawings

1 Fig. 10 is a schematic block diagram of a dispersing apparatus according to an embodiment of the present invention.

2 is a block diagram of the main part of in 1 shown dispersing device.

3 is a planar view of an example of a motion disc used in the 1 attached dispersing device is mounted.

4 is a planar view of another example of a motion disc used in the in 1 attached dispersing device is mounted.

5 is a planar view of another example of a motion disc used in the in 1 attached dispersing device is mounted.

6 is a planar view of another example of a motion disc used in the in 1 attached dispersing device is mounted.

7 is a planar view of another example of a motion disc used in the in 1 attached dispersing device is mounted.

8th Fig. 10 is a schematic block diagram of a dispersing apparatus according to a second embodiment.

9 Fig. 10 is a schematic block diagram of a conventional dispersing device.

10 shows a state in which beads in the dispersing device, which in 9 shown, pile up.

Detailed description of the preferred embodiments

1 to 7 show a dispersing device according to a first embodiment. 1 FIG. 3 is a schematic block diagram of a longitudinal section of the dispersion device; FIG. 2 is a partial side view of the 1 shown dispersing device, and 3 is a level view of a motion element.

A dispersing device 10 in the embodiment as in 1 and 2 For example, shown is a media agitator mill or the like which is an approximately cylindrical shaped cylinder 11 , an inlet 12 for dispersion (processing material) such as ink or the like attached to an end plate 11a of the cylinder 11 is formed, and an outlet 13 for removing dispersion in the cylinder 11 was introduced, dispersed and ground, at the other end plate 11b opposite the end plate 11a is formed. A disconnector 14 is over an opening 13a attached, in addition, the cylinder 11 by means of a column C, and dispersed and ground dispersion is passed through the gap C between the separator 14 and the opening 13a dissipated. The gap C allows media to enter the cylinder 11 not to pass through, for example, granular shaped beads 22 but it is designed to pass small diameter dispersion.

Furthermore, it is a main shaft 15 in the cylinder 11 essentially coaxial with the cylinder 11 introduced, he steps through the outlet 13 and the disconnector 14 and is arranged to be relative to the inner surface of the cylinder 11 can be turned. An internal cooling path 16 is in the main shaft 15 is formed as a cooling device for circulating cooling media such as cooling water or the like, and this cools the dispersion inside the cylinder 11 , The internal cooling path 16 includes, for example, an inlet tube 16a for supplying cooling water and a return pipe 16b , An external cooling path 20 will also be in the outer edge of the cylinder 11 which circulates cooling media, such as cooling water or the like, around the interior of the cylinder 11 to cool.

In the cylinder 11 are several movement disks 18 (Movement elements) and several rotors 19 alternating and coaxial on the main shaft 15 by means of an annular spacer 17 from the side of the disconnector 14 from attached.

3 shows an example of a case where the moving elements are moving disks. In 3 see movement discs 18 approximately disc-shaped, with a larger outer diameter than the rotors 19 as shown in this figure. Several (4 in the figure) recesses 21 be in the motion disc 18 provided around the outer edge thereof at predetermined intervals in the circumferential direction. The recesses 21 bend inward from the outer edge surface toward the center and extend forward in the direction of rotation. The recesses 21 are formed such that the width in the circumferential direction is greater than the outer diameter of the beads 22 what a passing of the beads 22 allows.

There are also through holes 23 between adjacent recesses 21 in the movement discs 18 at predetermined intervals in the circumferential direction near the rotor 19 punched out. The pearls 22 can also through the through holes 23 pass it, giving it a large number of pearls 22 located on the outlet side 13 of the cylinder 11 allowed to pass through and to the inlet side 12 to move.

The rotors 19 extending between adjacent movement discs 18 are substantially cylindrical, with a smaller diameter than the movement discs 18 , and the internal cooling path 16 circulates in its interior (not shown in the figure). The movement discs 18 and the rotors 19 be alternately and coaxially on the main shaft 15 attached and attached so that they are together with the main shaft 15 be rotated or rotate.

In 1 are motion discs 18 attached at both ends. However, alternatively, the construction may be such that rotors 19 attached at both ends. In other words, the movement discs 18 and the rotors 19 be arranged alternately, or the movement discs 18 can on a rotor 19 , which is formed as a long shaft, to be arranged at predetermined intervals. The space between the inner peripheral surface 11c of the cylinder 11 and the movement discs 18 and the rotors 19 forms a crushing chamber 24 (Mahlbereich), in which the beads 22 and dispersion is charged.

4 to 7 show examples of other moving elements used in the present invention. 4 shows a disc 18 that have more recesses and through holes 23 as the movement disk, the in 3 is shown. reference numeral 19 denotes a rotor. 5 shows a disc 18 , the recesses 21 and has no through holes. In this figure, reference numeral designates 19 a rotor. 6 shows a disc 18 , the through holes 23 but has no recesses. In this figure, reference numeral designates 19 a rotor. 7 shows a moving element, the pins 18a instead of a disc. In this figure, reference numeral designates 19 a rotor. reference numeral 11c indicates the inside of the cylinder.

A large number of granular beads 22 is held in the cylinder, and the beads 22 , which are attached to the inner surface 11c of the cylinder 11 by the rotation of the rotors 19 and the movement discs 18 be scattered, colliding with introduced dispersion and accumulated beads 22 , and crush and disperse the dispersion, which is toward the side of the outlet 13 is sent continuously as it repeats itself.

The pearls 22 For example, they look almost spherical and their mean particle size is set to about 0.2 to 3 mm. Furthermore, fill the beads 22 approximately 65 to 95% of the volume of the cylinder 11 and the percentage of filling is appropriately determined depending on the kind of dispersion, for example, a pigment or the like which is to be crushed, for example, how easily it can be crushed, or the particle size before crushing or the like. Furthermore, the material of the beads 22 which are used depending on the properties of the dispersion, for example, viscosity, specific gravity, required particle size for pulverization and dispersion and the like, and for example, glass beads, zirconium beads, zirconium oxide beads, steel balls or the like are used. However, in general, a material which has a high specific gravity and is difficult to grind is preferred. When the viscosity of a dispersion, such as ink, is high, beads become 22 chosen with high specific gravity.

There Steel beads generally black iron powder by collision, Friction and the like generate, they are for inky ink and the like used while in the case of whitish Ink beads, such as zirconia, can be used. in the In the case of a low viscosity dispersion, glass beads typically become used.

In general, pearls can 22 having a particle size of 5 to 6 times the initial particle size of the introduced dispersion can be used. In the dispersion processing of a dispersion, there is a case where it is processed into the required particle size by a one-stage dispersing apparatus, and a case where it undergoes several processing stages using a plurality of dispersing apparatuses loaded with beads having different particle sizes and it is gradually dispersed to the required particle size.

In the case where the outer diameter of the rotors 19 D1 is, and the inner diameter of the cylinder 11 D2 is, the ratio of the two D1 / D2 is set in a range of 0.4 to 0.7. When the ratio D1 / D2 is set in this range, the peripheral speed of the outer edge of the rotor 19 can be set high, and further, the distance to the inner peripheral surface 11c of the cylinder are set low. Therefore, there is a loss of kinetic energy for scattering the beads 22 low, thus enabling efficient crushing and dispersing of a dispersion. If it is below 0.4, then as the outer diameter of the rotors 19 is reduced, the distance to the inner peripheral surface 11c of the cylinder increases, the kinetic energy loss of the beads 22 is high, so that there is the disadvantage that it causes a short pass and easily a dispersion failure. Furthermore, it is difficult to room for the internal cooling path 16 so that there is the disadvantage that there is insufficient cooling area on the surface of the rotors 19 can be obtained in the structure. When the movement discs 18 no recesses 21 exhibit the movement and dispersion efficiency of the beads falls 22 essential.

In the case where the distance between adjacent motion discs 18 P is, the ratio becomes D1 / P with the outer diameter D1 of the rotors 19 set in a range of 1.4 to 3.0. If the ratio D1 / P is set in this range, there may be a movement of the beads 22 in the cylinder 11 be maintained satisfactorily, so that it is possible to drive off and a phenomenon of clogging of the beads 22 due to the speed of dispersion introduced. If it is 1.4 or larger, the distance between the motion discs is 18 not too large, which prevents deterioration of the movement of media, thus allowing the processing material to be sufficiently crushed and dispersed. Moreover, if it is 3.0 or less, the distance between the movement discs is 18 not too small, causing an uneven distribution and drift of the media (beads 22 ) is prevented, and thus a stable operation is ensured.

In addition, the arrangement pitch P of the moving elements does not always have to be a fixed distance, and the distance may be changed depending on the kind of the processing material. For example, if he is from the inlet 12 in the direction of the outlet 13 decreases, it is possible to gradually increase the dispersing power.

A dispersing device 10 According to the present embodiment, the structure described above. The following is a description of a dispersion method.

In the dispersing device 10 , in the 1 and 2 Shown are the pearls 22 before in the grinding chamber 24 loaded by the inner peripheral surface 11c of the cylinder, the movement discs 18 , and the rotors 19 in the cylinder 11 is defined. A dispersion is continuously from the inlet 12 the cylinder 11 fed, and at the same time, the movement discs 18 and the rotors 19 shot together by the main shaft 15 which is connected to a drive source (not shown in the figure) is rotated at a predetermined speed. At this time, the speed of the outer edge of the movement discs is 18 about 7 to 18 m / s, and preferably about 10 to 15 m / s.

In 3 The dispersion is made by rotating the motion discs 18 in the direction of the arrow together with the pearls 22 moved and dispersed. The pearls 22 become to the inner circumferential surface 11c of the cylinder 11 through the movement discs 12 scattered, colliding with the dispersion and pearls 22 that surround the inner peripheral surface 11c accumulate and crush and refine the dispersion particles. The rotors 19 that coincide with the slices 18 rotate, have large diameter, and so the peripheral speed of the outer peripheral surface is large. Thus, the pearls fly 22 and the dispersion that surrounds the outer edge of the rotors 19 accumulate, towards the inner peripheral surface 11c of the cylinder by centrifugal force.

In a conventional dispersing apparatus, since the ratio D1 / D2 is small and is 0.3 or less, the distance to reach the inner peripheral surface of the cylinder is large, and also the loss of the kinetic energy is large due to the viscoelasticity of the cylinder Dispersion which collides during the movement. Especially in the case where the dispersion has high viscosity properties, the energy loss is large. Furthermore, the viscosity of the dispersion when the edge of the inner peripheral surface 11c of the cylinder 11 through the outer cooling path 20 Cooling is high in this area, causing the energy loss to continue to increase.

However, according to the present embodiment, since the ratio D1 / D2 is large and 0.4 or more, the cross section (capacity) of the grinding chamber 24 decreases, but the kinetic energy of the pearls 22 due to high speed due to the short distance between the inner circumferential surface 11c of the cylinder, the dispersion, which has a comparatively high viscosity, works in the vicinity of the inner circumferential surface 11c of the cylinder sufficient to crush them, so that energy loss can be avoided.

In this way there is no dead space near the rotors 19 and the inner peripheral surface 11c , the dispersion in this room can be dispersed, and the beads 22 can also be moved, whereby a homogeneous finest dispersion and dispersion of the dispersion is made possible.

The pearls 22 and the dispersion in the milling chamber 24 of the cylinder 11 are gradually fed by the feed pressure of the inlet 12 supplied dispersion to the side of the outlet 13 cleverly. A gap C between the separator 14 and the opening 13a the outlet 13 prevents the beads 22 but allows finely divided dispersion to pass, leaving only dispersed dispersion from the outlet 13 is removed and recovered.

That means the beads 22 near the outflow 13 remain between the movement disc 18 and the side of the outlet 13 and the other end side 11b of the cylinder as in 1 and 2 accumulate, but to the side of the inlet 12 through through holes 23 in this movement disc 18 to be led back. In that case, it's easy, the pearls 22 to disperse when the movement disk 18 near the outlet 13 slightly outside the center of the rotor 19 attached, which allows the degree of recirculation of the beads 22 to increase. Furthermore, there are the pearls 22 on the delivery side normally in a crowded condition, but if the separator 14 outside the center of the rotor 19 is positioned, the effect of dispersing the beads increases 22 , which makes it possible to further increase the recirculation of the beads.

While the beads 22 in the longitudinal direction of the rotors 19 in the cylinder 11 In this way, a dispersion can be circulated continuously from the inlet 12 is fed, continuously dispersed and discharged. Since the ratio D1 / D2 is set high, according to the present embodiment, the cross section of the grinding chamber 24 reduced by about 20 to 30% from a conventional dispersing device. However, the outer diameter of the rotors is 19 increases, and the peripheral speed can be improved by two or three times, so that a dispersion processing efficiency in the cylinder 11 is increased, and the residence time of the dispersion is reduced. Moreover, since the dispersion efficiency is good, better processing quality can be achieved than with a conventional dispersing apparatus.

Moreover, in a conventional dispersing device, as the delivery rate of a dispersion is increased, the internal pressure of the cylinder is increased and converted into thermal energy, which sometimes affects the physical properties of a dispersion. In the dispersing device 10 However, according to the present embodiment, since the accumulation time of a dispersion is shortened, the increase of the internal pressure takes place only in the range of 0 to 0.01 MPa at a normal flow rate in the range of 100 to 300 kg per hour, and thus no Problem on. Moreover, the increase in internal temperature in the present embodiment can be achieved by cooling through the internal cooling path 16 in the rotors 19 as well as by cooling through the outer cooling path 20 of the cylinder 10 be suppressed.

According to the present embodiment described above, high kinetic energy is applied to the beads 22 in the cylinder 11 is given, and at the same time a loss of motion is reduced, so that the dispersion processing, in which a dispersion in the cylinder 11 crushed and moved, can be performed efficiently and satisfactorily, although the capacity of the grinding chamber 24 is reduced, and thus a processing quality can be improved. Furthermore, no increase in driving force is necessary for processing. Moreover, dispersion processing of dispersions can be carried out over a wide range of low viscosity (for example, 100 mPa · s) to high viscosity (for example, 100,000 mPa · s).

The following is a description of a second embodiment of the present invention using FIG 8th , A dispersing device as in 8th 4, has approximately the same structure as the first embodiment, so that the same reference numerals are used for the same parts, and descriptions are omitted.

In a dispersing device 30 , as in 8th Shown are several motion discs 18 at predetermined intervals on a main shaft 31 mounted in a cylinder 11 installed, and cylindrical collar rings 32 be on the outer surface of the main shaft 31 as rotors between adjacent motion discs 18 appropriate. The outer edge surface of the collar rings 32 has the same outer diameter D1 as the outer peripheral surfaces of the rotors 19 and the numerical ranges of the ratios D1 / D2 and D1 / P are the same as in the first embodiment. The collar rings 32 and the movement discs 18 rotate together with the main shaft 31 ,

This is what a dispersing device has 30 According to the second embodiment, the same effects as the first embodiment. It is particularly according to the present embodiment by changing the collar rings 30 possible, the outer diameter D1 and the distance P of the movement discs 18 so that there is an advantage in that they can be adjusted according to the type of dispersion, the degree of dispersion and the like.

In the embodiments described above, the movement discs 18 basically coaxial on the main shafts 15 and 31 attached, but they are not always coaxial and can also be eccentric be attached.

Furthermore, the movement discs 18 and the rotors 19 or the collar rings 32 not limited to items, and they can be trained as one part. In this case, the main sheep 15 and 31 also be designed as a part, or may be separate parts.

Moreover, it is possible the number of recesses 21 and through holes 23 the movement discs 18 set as desired.

at the embodiments described above Printing inks are used as processing material. Indeed the present invention is not limited to this, and they can for a series of dispersions or processing liquids are used, such as can coatings, metal and automotive coatings, Battery and magnetic coatings, pulp and the like.

Experimental examples

It follows a description of experimental examples of the present Invention.

Examples 1, 2, 3, 4, 5, 6, 7 and 8 and Comparative Examples 1, 2, 3, 4, 5, 6 and 8 have the same structure as the dispersing device 10 according to the first embodiment, and the outer diameter D1 of the rotors 19 are varied as shown in Tables 1 and 2 below. Accordingly, there are differences in ratios D1 / D2 and D1 / P, a volume of the grinding chamber 24 , a shank power and the like.

First Experiments were performed on Examples 1-5 and comparative examples 1-5 performed.

(1) Samples 1 and 2

Engraving based inks, which are dispersions containing the following compositions were used as samples 1 and 2.

Sample 1

• Name: gravure base ink
• Pigment: copper phthalocyanine blue
• Pigment content 22% by weight, balance cellulose nitrate resin or similar

Sample 2

• Name: gravure base ink
• Pigment: azo yellow
• Pigment content 20% by weight, balance cellulose nitrate resin or similar

Of Further, samples 1 and 2 were prepared using the following procedure generated.

The gravure base inks described above were each charged open tank into a 400l (liters), were moved or by an Einzelschaftrührwerk with slices with 10 inches in diameter at a rotational speed of 1000 min ^-1 for one hour agitated, and 200 kg for a Dispergierungstest by a dispersing device (media agitator mill) is used. The viscosities after agitation were 2500 mPa · s for Sample 1 and 1500 mPa · s for Sample 2.

The viscosities were prepared using a viscose VT04 type B viscometer (manufactured by Rion Co. Ltd.). The measuring temperature was 25 ° C.

(2) Joint operating test conditions from sample 1 and 2

beads 22

• Pearl Type: Zirconia YTZ (manufactured by Nikkato Corporation)
• Bead diameter: 1 mm
• true specific gravity: 6.00 apparent specific gravity: 3.6
• Perlfüllmenge: 85% Edge speed of the outer edge surface of the Movement discs 18: 13.5 m / s

(3) Evaluation of dispersibility

1. Comparison of the performance

The processed samples 1 and 2 were measured using a grinder, and the evaluation was done based on the amount that was processed per hour if one Maximum of 5 μm was achieved. A larger amount processed ink indicates a higher efficiency with the same quality at. For a dispersing efficiency became a comparison of the same samples where: dispersion efficiency = throughput in the example / throughput in the comparative example.

2nd quality

The Gravure base inks obtained by dispersion processing was on a 25 micron PET film plotted by a # 7 bar coater, and a quality rating the surface of the film to which the paint was applied was used a 60 ° mirror reflection gloss meter made. The quality the gravure ink of Sample 1 and 2 was higher when the brightness value was higher.

A Wearing a rod coater a film of constant thickness quickly and accurately. It has thin lines on, the bar surface orbiting, and is indicated by a number on the thickness the thin one Lines based. The used bar coater was; Material: SUS304, rod: 8 mm diameter × 300 mm length (effective length 250 mm), type: # 7, manufactured by Dai-Ichi Rika Co. Ltd.

Of Further, as a gloss meter, a GM-3 type photometer was fabricated from Murakami Color Research Laboratory, and used a specular reflectance 60 ° was used as rating. The method for measuring specular Shine was JIS 28741.

(4) Comparative evaluation

Work operations were on Samples 1 and 2 using a dispersing device as carried out in Example 1 and Comparative Example 1, at which the conditions D1 / D2 varied as shown in the following Table 1, and the Results were compared. In the same way, work operations were at each Examples 2-5 and Comparative Examples 2-5 carried out, and the results were compared.

When next Experiments were performed using other samples for examples 6-8 and Comparative Examples 6 and 8 performed.

(1) Samples 3 and 4

lithographic Base inks which are dispersions containing the following compositions were used as samples 3 and 4.

Sample 3

• Name: Litographic base ink
• Pigment: carbon black
• Pigment content: 40 wt .-% balance wax, varnish or something similar

Sample 4

• Name: Litographic base ink
• Pigment: carbon black
• Pigment content: 40 wt .-% balance wax, varnish or something similar

rehearse 3 and 4 were produced using the following procedure.

Sample 3 was moved by a Einzelschaftrührwerk with slices of 8 inches in diameter at a rotational speed of 1000 min ^-1 for two hours, and 50kg was used for a Dispergierungstest by a dispersion apparatus (Medienrührwerksmuhle). The viscosity of Sample 3 was 58000 mPa · s.

Sample 4 was agitated by a double conical stirrer for two hours. The inner high-speed movement sheet was rotated at 700 min ^-1, and the outer constant speed motion sheet at 20 min ^-1. 800 kg was used for the dispersion test by a dispersing apparatus (stirred media mill). The viscosity of Sample 4 was 15000 mPa · s.

viscosity measurements were made using the same measuring devices as for samples 1 and 2 carried out under the same conditions.

(2) Common operating conditions of Samples 3 and 4

beads 22

• Pearl Type: Steel (Chrome) SUJ-2 (made by Daido Kogyo Co., Ltd.)
• Bead diameter: 2 mm
• true specific gravity: 8.00 apparent
• specific gravity: 4.68
• Pearl Capacity: 85% Edge speed of the outer edge surface of the Movement discs 18: 13.5 m / s

(3) Evaluation of dispersibility

1. Comparison of the performance

The dispersion-processed samples were prepared using a Mahlmessgeräts measured, and the rating was carried out based on the amount that was processed per hour, when reached a maximum of 10 microns has been. Other conditions were the same as in the case of Samples 1 and 2. The method of evaluating the degree of malaxation through a grinder happened in accordance with 4.3.2 from JIS K5701-1.

(4) Comparative evaluation

Work operations were on Samples 3 and 4 using a dispersing device as carried out in Examples 6 and 7 and Comparative Example 6, at which the conditions D1 / D2 as shown in Table 2 below, and the results were compared. In the same way, work was done on both Example 8 and Comparative Example 8, and the results were compared.

at In Comparative Example 6, flow clogging (flow failure) occurred. and the internal pressure of the dispersion device reached 0.4 MPa or more, so that the load was significantly increased and the operation could not be continued.

When the examples and comparative examples using the same samples were respectively compared and evaluated according to the above Tables 1 and 2, the throughput (processing performance) to obtain the same quality as in Comparative Examples was, in the case of Example le increased by 25-40%. The throughput per single cremation chamber 24 (milling area) increased efficiency by 48-96%. Furthermore, the shaft power could be reduced by 10-20%, so that energy savings could be achieved. The throughput per shaft power could be increased by 40-85%. In Samples 1 and 2, the quality (gloss) of the gravure base could be improved along with the improvement in throughput.

moreover was used in Examples 6 and 7 in which Sample 3 with high viscosity was confirmed, that highly viscous dispersions could be processed acceptably. Examples 6 and 7 confirmed that high viscosity ink, which is not in the conventional Device processed as shown in Comparative Example 6 could be stably processed without dispersion failure accompanied by a pearl clogging or internal pressure and Schaftleistungsabnormalitäten due to a local overfilling of the Cause pearls.

Effects of the invention

at Use of a dispersing device and a dispersion method according to the present invention described above Media around the outer edge of Rotors given a high kinetic energy when turning, which it collides with processing material and the like to to disperse it, and loss of movement can be reduced become. Consequently, the dispersion processing in the processing material in which cylinder is crushed and moved, be carried out efficiently, although the capacity the cylinder is reduced, which allows the quality of the processed To improve materials. Furthermore, there will be no increase in Driving force for the processing needed.

moreover is in a case where the ratio D1 / P of the arrangement pitches P is the Movement elements to the outer diameter D1 is set in a range of 1.4 to 3.0, a movement of Media in the cylinder well, so the incorporated processing materials can be dispersed efficiently, and at the same time make it possible is a laminar flow for train their transport, so that the processing efficiency and quality be improved.

Claims (10)

Horizontal cylindrical dispersing device ( 10 ), in which rotors ( 19 ) in a cylinder ( 11 ), and several movement elements ( 18 ), which of the rotors ( 19 ) are projecting in the radial direction, are provided, which at a predetermined distance in a longitudinal direction of the rotors ( 19 ) and wherein processing material entering the cylinder ( 11 ), together with media ( 22 ), wherein the outer diameter of the rotors ( 19 ) D1 is the inner diameter of the cylinder ( 11 ) D2, and a ratio D1 / D2 is set in a range of 0.4 to 0.7, characterized in that the media ( 22 ) have an average particle size of 0.2 to 3 mm to agitate and disperse the processing material. Dispersion device according to claim 1, wherein, where an arrangement distance of the moving elements ( 18 ) P, a ratio D1 / P with the outer diameter D1 of the rotors is set in a range of 1.4 to 3.0. Dispersion device according to claim 1 or 2, wherein a cooling device ( 16 ) in the rotors ( 19 ) is provided to cool the processing material. A dispersion device according to claim 1, wherein the moving elements are discs. A dispersion device according to claim 1, wherein the moving elements are discs that have recesses, extending in the radial direction from the outer edge surface extend inside. A dispersion device according to claim 1, wherein the moving elements are discs, the recesses are themselves in a radial direction from the outer edge surface extend inside, and have through holes through which grained Media can pass through. Dispersion process, wherein rotors ( 19 ) and movement elements ( 18 ) outside the rotors ( 19 ) protrude in a radial direction, in a horizontal cylinder ( 11 ) are provided, and wherein an outer diameter of the rotors ( 19 ) D1 is an inner diameter of the horizontal cylinder ( 11 ) D2 is set to a ratio D1 / D2 in a range of 0.4 to 0.7, processing material into the cylinder ( 11 ), and the rotors ( 19 ) and movement elements ( 18 ) to move the processing material together with the granular media, characterized in that the media have an average particle size of about 0.2 to 3 mm for the purpose of dispersion processing. A dispersion method according to claim 7, wherein an arrangement pitch P of said moving elements ( 18 ) P is a ratio D1 / P with the outer diameter D1 of the rotors ( 19 ) is set in a range of 1.4 to 3.0. A dispersion method according to claim 7, wherein the Movement elements are discs that have recesses that in the radial direction from the outer edge surface extend inside. A dispersion method according to claim 7, wherein the Movement elements are discs, the recesses, which are in radial Direction from the outer edge surface extend inside, and have through holes through which the grainy ones Media can pass through.