JP3219229B2 - Method and apparatus for dispersing powder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for dispersing powders and granules in a predetermined distribution pattern in a predetermined manner.

[0002]

2. Description of the Related Art Japanese Patent Laid-Open No. 4-34 discloses a conventional technique for spraying a granular material on a moving article in a predetermined spray pattern.
The method described in 1368 (hereinafter, referred to as method 1) and the method described in JP-A-62-129180 (hereinafter, referred to as method 2) are known.

The above-mentioned method 1 is a method of intermittently dispersing powder particles by sucking a part of a continuous flow of powder particles supplied from a so-called powder feeder (screw feeder) with a vacuum. In addition, the method 2 includes forming a disk having a pattern-shaped opening below the powder feeder,
In this method, the disk surface is disposed perpendicularly to the continuous flow of the granular material, and the disk is rotated to intermittently spray the granular material.

[0004]

However, the above method 1
In this method, it is difficult to form a predetermined edge on the sprayed particles because the intermittent spraying of the particles is performed by vacuum suction, and the outline of the spray pattern becomes very unclear. However, there was a problem that a complete spraying pattern could not be obtained, for example, powder particles that could not be completely sucked remained in unnecessary portions. In addition, since the powder particles are intermittently sprayed by the vacuum suction as described above, a spray pattern of an arbitrary shape (for example, a circular shape, an elliptical shape, a triangular shape, etc.) cannot be obtained. Furthermore,
If the intermittent cycle is shortened (the speed of moving the conveyed material is increased), the on / off of the vacuum suction is delayed, and as a result, the spray phase and spray length change with respect to the cycle length (speed increase / decrease). As a result, there has been a problem that a stable spray pattern cannot be formed.

On the other hand, in the above-mentioned method 2, since the continuous flow of the granular material is blown in the direction of rotation of the disk at the end of the opening, the granular material is scattered or sprayed to the unnecessary portion. For example, there is a problem that a stable scatter pattern cannot be formed, such as a decrease in yield of the powdery granules to be produced.

[0006] An object of the present invention is to surely suppress the scattering of powder and granules to unnecessary portions, and to have a sharp contour.
Another object of the present invention is to provide a method and an apparatus for dispersing powder and granules capable of stably forming an arbitrary distribution pattern having a uniform distribution of powder and granules.

[0007]

According to the first aspect of the present invention, there is provided a method of dispersing a granular material on a moving conveyed object in a predetermined dispersing pattern. A first cylindrical body having a supply port and a spraying port for powdery and granular materials is disposed with the spraying port facing downward, and a concave portion having a predetermined shape is formed on the outer peripheral surface in the first cylindrical body. part of the Yes and and the peripheral wall
A second cylindrical body having an opening formed in the second cylindrical body is rotatably disposed around the axis thereof, and further provided in the second cylindrical body from the opening.
Collector for collecting the dropped granular material leave arranged, particulate through upper SL on <br/> Symbol supply port above the outer peripheral surface recess of the second tubular member first cylindrical body Supplying a powdery body, and then rotating the second cylindrical body about an axis to spray the powdery substance from the spraying port, thereby providing a method for dispersing the powdery substance, thereby providing the above object. Is achieved.

[0008] The invention described in claim 2 of the present invention provides:
2. The method according to claim 1, wherein the second particle is sprayed.
Wherein the peripheral speed of the outer peripheral surface of the cylindrical body is the same as the moving speed of the conveyed object.

Further, the invention according to claim 3 of the present invention provides:
As a preferred apparatus used for carrying out the method of the present invention for dispersing a granular material, a first cylinder which is provided substantially horizontally and has a supply port for the granular material and a scatter port which opens downward is provided on the peripheral wall portion. And a second cylinder having a concave portion of a predetermined shape on the outer peripheral surface and having the same axis as the first cylindrical body and being rotatable around the axis in the first cylindrical body. And a supply means for supplying the granular material to the outer peripheral surface of the second cylindrical body through the supply port, and an opening is provided in a part of a peripheral wall portion of the second cylindrical body.
Forming a portion, from the opening of the granular material from the supply means
A part of the second cylindrical body is dropped.
Inside, there is a collecting device for collecting the granular material dropped into the cylindrical body.
An object of the present invention is to provide an apparatus for dispersing powder and granules, which is provided.

[0010] The invention described in claim 4 of the present invention provides:
The present invention provides an apparatus for dispersing powder and granules, wherein a plurality of projections are formed in the recess.

[0011]

The invention according to claim 5 of the present invention provides:
The apparatus for dispersing powdery and granular materials according to claim 4, wherein the distance between the tip of the projection and the inner peripheral surface of the first cylindrical body is 5 to 200.
An object of the present invention is to provide an apparatus for dispersing powder and granules characterized by providing a gap of μm.

[0013]

According to the method of the present invention, the first cylindrical body having the supply port and the spray port for the granular material on the peripheral wall portion is directed downward. And a second cylindrical body having a concave portion of a predetermined shape on an outer peripheral surface is rotatably provided around the axis of the second cylindrical body in the first cylindrical body. After supplying the granular material through the supply port to the outer peripheral surface of the body, rotating the second cylindrical body around an axis, and receiving the measured granular material in the concave portion,
Since the powders are sprayed from the spraying port, the spraying of the powders to unnecessary portions is reliably suppressed, and the powders are sprayed on the moving object in a predetermined spray pattern. Any scatter pattern having a sharp contour is stably formed. Further, an opening is formed in a part of the peripheral wall of the second cylindrical body.
And falls from the opening into the second cylindrical body.
Since a collecting device for collecting a part of the powder and granules was installed,
Powder particles fall from the opening and are collected by the collector.
It is recovered and the intermittent application of the powder is ensured.

In the method of the present invention, the peripheral speed of the outer peripheral surface of the second cylindrical body is the same as the moving speed of the conveyed object. A scatter pattern having substantially the same shape as the shape of the concave portion formed on the outer peripheral surface of the second cylindrical body is formed.

According to the third aspect of the present invention, in the apparatus for dispersing a granular material, the supplying means supplies the granular material to the outer peripheral surface of the second cylindrical body through the supply port. The second cylindrical body is rotated around an axis, the powder and the granular material are quantitatively received by a concave portion on the outer peripheral surface of the cylindrical body, and the second cylindrical body is further rotated to rotate the powder from the spray port. By spraying the granules, the spraying of the granules to unnecessary portions of the spray is surely suppressed, and an arbitrary spray pattern having a sharp contour is stably formed. In addition, the second cylindrical body
An opening is formed in a part of the peripheral wall of the second cylindrical body.
The powder and granules from the supply means falling from the opening
Powder that is not sprayed because a collection device is
The granules fall from the opening and are collected by the collection device,
Intermittent application of granules is ensured.

In the apparatus for dispersing powdery or granular material according to the fourth aspect of the present invention, since a plurality of projections are formed in the concave portion, in addition to the function of the apparatus for distributing the powder according to the third aspect, the conveying is performed. A stable spray pattern can be more reliably formed on the object.

[0017]

According to a fifth aspect of the present invention, in the apparatus for dispersing powdery and granular materials, the tip of the projection formed on the outer peripheral surface of the second cylindrical body and the inner peripheral of the first cylindrical body. since there is provided the gap 5~200μm between the surface, in addition to the operation of the spraying device of the granular material according to claim 4, granular material with the rotation of the second tubular body is first The movement between the cylindrical body and the second cylindrical body is surely suppressed, so that a uniform and clear contour spray pattern without uneven spray can be obtained.

[0019]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

FIGS. 1 and 2 show an embodiment of the apparatus for dispersing powdery and granular materials according to the present invention. In the figure, reference numeral 1 denotes a powder / granule spraying device (hereinafter simply referred to as “spraying device”), P denotes a powder / granule, and S denotes a moving conveyed object.

As shown in FIG. 1, the spraying device 1 comprises:
Supply port 2 for powdery material and spray port 3 opening downward
A cylindrical casing (first cylindrical body) 5 having a peripheral wall portion 4 (see FIG. 2) and disposed substantially horizontally, and a rectangular concave portion 7 on the outer peripheral surface 6 as viewed in plan. A cylindrical rotor (second cylindrical body) 8 having the same axis as the casing 5 and rotatably arranged around the axis in the casing 5, and an outer peripheral surface of the rotor 8 through the supply port 2. 6 is provided with a supply means 9 for supplying a granular material.

As shown in FIG. 2A, the supply port 2 and the spraying port 3 of the casing 5 are
In the present embodiment, the supply port 2 is provided above and the spray port 3 is provided below the peripheral wall section 4. Above the supply port 2, a supply means 9 described later is provided. The spray port 3 is formed in a rectangular shape in plan view for determining the spray pattern of the granular material. As shown in FIG. 1, the casing 5 is supported by a hollow support 5a at a back surface portion, and a rotating shaft (not shown) of the rotor 8 is disposed in the support 5a.

As shown in FIG. 2A, two concave portions 7 of the rotor 8 are formed at diagonal positions of the outer peripheral surface 6 of the rotor 8, and each concave portion 7 has A plurality of ridges (projections) 70 having a triangular cross section extending in the longitudinal direction are formed. A gap of 5 to 200 μm, preferably 20 to 120 μm is formed between the tip of the projection 70 and the inner peripheral surface of the casing 5. If the gap is out of the range of 5 to 200 μm, depending on the properties of the granular material, the granular material moves between the casing 5 and the rotor 8 as the rotor 8 rotates, and the outer peripheral surface of the rotor 8 This is because it is not possible to obtain a scatter pattern equal to the shape of the recessed portion 7 formed in the recess 6.

A rectangular opening 80 in a plan view is formed in a portion of the peripheral wall of the rotor 8 located between the recesses 7. Then, supply means 9 described later.
(Particles that are not sprayed) supplied from the company are dropped.

A collection hood (collection device) 10 for collecting the powders falling from the opening 80 is disposed in the rotor 8. Then, when the opening 80 of the rotor 8 reaches below the supply port 2 of the casing 5, the non-sprayed particles are dropped into the collection hood 10 and collected.

As shown in FIG. 1, the supply means 9 comprises a funnel 90 for storing a predetermined amount of powder and granules, and a screw auger 91 for measuring and sending out the powder and granules.
And a dispersion disk 92 for increasing the dispersion width of the granules, and a scattering prevention cylinder 93 for preventing the dispersion of the granules and determining the dispersion width.

Next, the procedure of the method of the present invention for dispersing the powder and granules will be described based on the operation of the above-mentioned dispersing apparatus 1 together with its operation.

First, the casing 5 and the rotor 8 are previously arranged above the article S as shown in FIG.
The above-mentioned supply means 9 is arranged on the upper part of the casing 5 ,
The granular material is stored in the funnel 90, and the screw auger 91 is rotated to continuously and quantitatively send the granular material to the spraying disk 92. Then, the continuous flow of the granular material is spread in a circular shape by the scatter disk 92, and is further dropped along the inner wall of the scattering prevention cylinder 93. Then, as shown in FIG. 2, the granular material is supplied to the outer peripheral surface 6 of the rotor 8 through the supply port 2 of the casing 5.

Next, as shown in FIG. 2A, the rotor 8 is rotated about its axis so that the peripheral speed of the outer peripheral surface 6 of the rotor 8 becomes the same as the moving speed of the article S. In the spraying apparatus 1, the powdery and non-sprayed particles fall into the collecting hood 10 when the opening 80 of the rotor 8 reaches below the supply port 2, are collected, and are sent to the supply means 9 again. .

Then, as shown in FIG. 2B, when the rotor 8 is further rotated, the quantitatively weighed powder particles held between the concave portion 7 and the inner peripheral surface of the casing 5 are sprayed. Sprayed from mouth 3. At this time, the granular material is newly taken into the other concave portion 7 from the supply means 9 through the supply port 2.

Then, as shown in FIG. 2C, when the opening 80 of the rotor 8 passes above the sprinkling port 3 of the casing, the particles are not sprinkled, and The part is made and is designed to be intermittently sprayed.

Then, as shown in FIG. 2 (d), when the rotor 8 is further rotated, the powdery material, which has been quantitatively weighed and newly held in one of the recesses 7, is sprayed from the spraying port 3,
The next pattern spraying is performed. By performing such continuous rotation of the rotor 8 and repeating the spraying operation, intermittent pattern spraying of the granular material on the transported object S is performed.

As described above, according to the granule spraying apparatus 1 and the method of spraying the granules using the same according to the present embodiment, the spraying of the granules to unnecessary portions is surely suppressed. At the same time, it is possible to stably form an arbitrary scatter pattern having a sharp outline. Further, since the structure of the apparatus is very simple, both maintenance and management are easy.

[0034] In the method for dispersing a powder or granule according to the present invention,
The powders and granules to be sprayed are not particularly limited, but when the present invention is applied to the production of absorbents for absorbent articles such as disposable diapers and sanitary napkins, the particle size constituting the absorbents Is preferably used, such as a water-absorbing powder having a particle size of about 10 to 750 μm.

The moving articles are not particularly limited. However, when the present invention is applied to the manufacture of absorbent articles for absorbent articles such as disposable diapers and sanitary napkins, the absorbent articles may be constituted. Absorbent paper, ground pulp laminated sheet, PE
Film sheets and the like are preferably used.

FIG. 3 schematically shows an example in which the spraying apparatus 1 is applied to a part of a manufacturing apparatus of an absorbent body for an absorbent article such as a disposable diaper using a large amount of water-absorbing powder. .
In addition, in the figure, the spraying apparatus 1 illustrated only the rotor 8 for convenience. In the drawings, reference numeral 11 denotes a rotary cutter, 12 denotes a conveyor, and 13 denotes a water-absorbent sheet constituting an absorber.

In the apparatus shown in FIG. 3, by making the outer diameter and the number of rotations of the rotary cutter 11 and the rotor 8 the same, the cutting position with respect to the sprayed portion can always be made equal. Further, by making the moving speed of the water-absorbent sheet 13 (the speed of the conveyor 12) equal to the peripheral speed of the outer peripheral surface 6 of the rotor 8, the powdery and granular material having the same pattern as the shape pattern of the concave portion 7 of the rotor 8 is obtained. Can be transferred (sprayed) onto the water-absorbent sheet 13. In the apparatus as described above, for example, when the apparatus is started up, even when the moving speed of the water-absorbent sheet is changed, there is no defect in dispersal or misalignment of the cut, and the defect occurrence rate of the product can be reduced. In addition, resources can be reduced, and the cost of the obtained product can be significantly reduced.

The apparatus for spraying powders and granules according to the present invention is not limited to the spraying apparatus 1 of the above-described embodiment, and the size, shape, etc. may be appropriately changed without departing from the object of the present invention. Can be.

For example, in the above embodiment, the rotor 8 is
Although it has a rectangular recess 7 and an opening 80 in plan view, in the device of the present invention, the shape of the rotor is not limited to this form, and is shown in FIGS.
As shown in FIG. 5, a rotor 8 'having a projection 70' and an opening 80 ', a recess 7 "as shown in FIG.
Like the rotor 8 "having the projections 70" and the openings 80 ", it can be arbitrarily selected according to the spray pattern of the granular material. The number of the concave portions is also appropriately selected according to the spray interval. can do.

Further, it is preferable to form the projection 70 in the concave portion of the rotor as in the above embodiment. In addition, the shape of the projection is preferably a ridge extending in the length direction of the rotor as described above, but may be formed in a lattice shape, concentric shape, or a ridge extending in the circumferential direction of the rotor, or a conical shape. May be formed in a pyramid shape or the like, and these may be randomly or scattered in a predetermined arrangement. Moreover, you may combine these protrusions and the protrusion formed in the shape of a cone.

[0041]

As described above, according to the method for dispersing the granular material according to the present invention, the peripheral speed of the outer peripheral surface 6 of the rotor 8 and the moving speed of the conveyed object S are set to the same speed, so that Although it is preferable to obtain a spray pattern having substantially the same shape, the peripheral speed of the outer peripheral surface 6 of the rotor 8 and the moving speed of the conveyed product are:
These speeds need not always be the same, and these speeds may be appropriately adjusted according to the shape of the concave portion 7 of the rotor and the spray pattern to be formed.

Further, the method for dispersing the granular material according to the present invention comprises:
It goes without saying that the embodiment is not limited to the application by the spraying apparatus 1 of the above embodiment.

[0044]

According to the method and apparatus for dispersing powdery and granular materials according to the present invention, the following effects can be obtained. Claim 1
According to the method for dispersing powders and granules described in (1), it is possible to reliably suppress the dispersion of the powders and granules to unnecessary portions and to stably form an arbitrary dispersion pattern having a sharp contour. Further, an opening is formed in a part of the peripheral wall of the second cylindrical body.
Forming part of the powder and granules supplied through the supply port.
Since it is collected in a collector, intermittent application of powder and granules
Can be performed reliably.

According to the second aspect of the present invention, in addition to the effect of the first aspect, the concave portion formed on the outer peripheral surface of the second cylindrical body. Can be obtained.

According to the apparatus for dispersing powder and granular material according to the third aspect, the method for dispersing the powder and granular material according to the first or second aspect having the above effects can be suitably implemented.

According to the dusting apparatus of the fourth aspect, since the plurality of projections are formed in the concave portion, in addition to the effect of the spraying apparatus of the third aspect, the surface of the article to be conveyed can be reduced. Thus, it is possible to more reliably form a uniform spray pattern without unevenness.

[0048]

According to the powdery and granular material spraying apparatus of the fifth aspect, the tip of the projection formed on the outer peripheral surface of the second cylindrical body and the inner peripheral surface of the first cylindrical body Between 5 and 200
A gap of μm is provided to reliably suppress the movement of the powder or granular material between the first cylindrical body and the second cylindrical body due to the rotation of the second cylindrical body. In addition to the effects of the powdery and granular material spraying device according to the fourth aspect, it is possible to obtain a clearer spraying pattern with a uniform spraying amount distribution.

[Brief description of the drawings]

FIG. 1 is a partially cut-away perspective view showing a main part of an embodiment of a powdery and granular material spraying apparatus according to the present invention.

FIG. 2 is a side cross-sectional view of a main part showing a process of dispersing the powder and granules by the powder and granule dispersing apparatus of the embodiment, and FIG. (B) is a side cross-sectional view showing a state in which the granular material is being sprayed from the spray port,
(C) is a side cross-sectional view showing a state in which a new predetermined amount has been received and non-sprayed particles have been collected in the collection device through the opening, and (d) is a newly quantitatively weighed particle. It is a sectional side view which shows the state which is spraying from a spray opening.

FIG. 3 is a schematic view showing a part of an absorber manufacturing apparatus to which the powdery and granular material spraying apparatus of the embodiment is applied.

FIG. 4 is a view showing the appearance of a rotor having a concave portion for an arbitrary spray pattern, (a) is a schematic perspective view of a rotor for obtaining a spray pattern having a non-spray portion having a triangular shape, and (b). 1 is a schematic perspective view of a rotor for obtaining a spray pattern having a T-shaped non-sprayed portion, and FIG. 2C is a schematic perspective view of a rotor for obtaining a spray pattern having a circular non-sprayed portion.

FIG. 5 is a schematic perspective view showing the appearance of a rotor for obtaining a triangular spray pattern.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Spraying apparatus of a granular material 2 Supply port 3 Spray port 4 Peripheral wall part 5 Casing (1st cylindrical body) 6 Outer peripheral surface 7, 7 ', 7 "recessed part 70, 70', 70" Projection 8, 8 ' 8 "rotor (second cylindrical body) 80, 80 ', 80" opening 9 supply means 10 recovery device

Continuation of front page (56) References JP-A-4-341368 (JP, A) JP-A-3-249974 (JP, A) JP-A-62-129180 (JP, A) JP-A-2-52070 (JP) , A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B05C 19/00-19/06 B05C 11/10 B05B 15/04 B05D 1/12 B05D 3/00

Claims (5)

(57) [Claims] 1. A method for dispersing a granular material on a moving conveyed object in a predetermined dispersing pattern, comprising: a first cylinder having a supply port and a dispersing port for the granular material on a peripheral wall portion. Shape
While disposed toward the diverging cloth opening downwards, the cylindrical body of the first recess have a and the peripheral wall portion of a predetermined shape on the outer peripheral surface
A second cylindrical body having an opening formed in a part thereof is rotatably disposed around an axis thereof, and the opening is further provided in the second cylindrical body.
Leave disposed collector for collecting the dropped granular material from,
Above the outer peripheral surface recess of the upper Symbol second tubular member first cylindrical body
And supplying the granular material through the supply port, and then rotating the second cylindrical body around an axis to spray the granular material from the spraying port. 2. The peripheral velocity of the outer peripheral surface of the second cylindrical body is:
2. The method according to claim 1, wherein the moving speed is the same as the moving speed of the article. 3. A first cylindrical body which is provided substantially horizontally and has a supply port for powdery particles and a spray port which opens downward, and a concave portion having a predetermined shape on an outer peripheral surface. A second cylindrical body provided in the first cylindrical body and having the same axis as the first cylindrical body and rotatably disposed around the axis; and the second cylindrical body through the supply port. Supply means for supplying the granular material to the outer peripheral surface of the cylindrical body, and an opening is provided on a part of the peripheral wall of the second cylindrical body.
Forming a mouth, and from the opening, the granular material from the supply means;
Of the second cylindrical member
A recovering device for recovering the powdered particles dropped into the cylindrical body in the body
Spraying apparatus granular material, characterized in that it has disposed. 4. The apparatus according to claim 3, wherein a plurality of projections are formed in the recess. Wherein said projection tip and the first tubular member inner peripheral surface and claim 4 Symbol mounting of the granular material of the sprayer, characterized in that a gap 5~200μm between .