JP2019052013A - Powder particle spraying device and method for producing powder particle-containing article - Google Patents

Abstract

To provide a powder particle spraying device and a method for spraying a powder particle capable of spraying powder particles on a continuously conveyed base material evenly and well quantitatively in a width direction of the base material.SOLUTION: A powder particle spraying device 1 includes a hopper 2 provided with a storage part 20 and a discharge port 23, and a conveying spraying part 3 for spraying powder particles P discharged from the discharge port 23 on a base material 100 continuously conveyed. The conveying spraying part 3 is constituted including a tabular receiving part 30 for receiving the powder particles P and a vibration generating part 31 for vibrating the receiving part 30, and operates the vibration generating part 31 to vibrate the receiving part 30, whereby the powder particles P on the receiving part 30 are conveyed in a predetermined direction. The vibration generating part 31 is operated at a frequency in which a value of an inclination m of a calibration curve determined from a relation of an amplitude N of the vibration generating part 31 with a spraying amount Q of a plurality of the powder particles P conveyed in the predetermined direction and sprayed on the base material 100 is larger than 0 and 0.4 or less in terms of a value shown as a variation.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a powder particle dispersion device and a method for producing a powder particle-containing article.

  In the manufacture of various products, it is desired to uniformly disperse powder particles over the width direction of a continuously conveyed substrate. With regard to the technology aimed at meeting such a demand, for example, Patent Document 1 includes a hopper capable of temporarily storing powder particles therein, and the powder particles discharged from the hopper are continuously conveyed. In the powder particle spraying device that can be sprayed on the base material, a screw conveyor for conveying the powder discharged from the hopper in the horizontal direction is disposed below the hopper, and A rotor for conveying the granular material in the vertical direction is disposed below, and a gap adjusting mechanism for discharging the granular material in a state of being aligned in the vertical direction one by one below the rotor Is disclosed.

Japanese Patent Laid-Open No. 6-92433

  The powder and particle distribution device described in Patent Document 1 aligns a large number of powder particles in the vertical direction immediately before the powder particles are sprayed on a continuously conveyed base material, and starts from the row of the powder particles. When the particles are sprayed on the base material, such a spraying mechanism can be applied only when the particles are spherical and have a small particle size distribution. When a non-spherical granular material or a granular material having a wide particle size distribution is dispersed using the granular material dispersing device described in Patent Document 1, it is difficult to align the granular material in the vertical direction. There is a possibility that clogging of granules occurs, and the powders cannot be dispersed with good quantitativeness.

  Therefore, the subject of this invention is providing the granular material spreading | diffusion apparatus which can eliminate the fault which the prior art mentioned above has.

  The present invention is disposed inside a storage unit capable of temporarily storing powder particles, a hopper having a discharge port for discharging the powder particles in the storage unit, and a gap with respect to the discharge port. , A granular material spraying device comprising a conveying and scattering unit that conveys the granular material discharged from the discharge port in a predetermined direction and spreads it on a continuously conveyed base material, the conveying and scattering unit comprising: A receiving unit that receives a plurality of powder particles discharged from the hopper and a vibration generating unit that vibrates the receiving unit, and operates the vibration generating unit to vibrate the receiving unit. The plurality of powder particles on the receiving part can be conveyed in the predetermined direction, and are conveyed in the predetermined direction by the amplitude of the vibration generating part and the vibration of the receiving part. Slope of the calibration curve obtained from the relationship with the amount of powder particles sprayed A value greater than the value expressed is 0 as the change amount, and at a frequency of 0.4 or less, there is provided a granular material spraying device for actuating the vibration generator.

  Further, the present invention is a method for producing a granular material-containing article, wherein the granular material discharged from the hopper is conveyed and dispersed in a predetermined direction to produce an article containing the granular material, Using a receiving part for receiving a plurality of powder particles discharged from the hopper and a conveying / spreading part including a vibration generating part for vibrating the receiving part, the substrate by the amplitude of the vibration generating part and the vibration of the receiving part Obtain a calibration curve from the relationship with the amount of the powder particles sprayed above, determine the absolute value of the change expressed as the amount of change with respect to the resonance frequency, and the absolute value of the change. A method of manufacturing a granular material-containing article, in which the vibration generating unit is operated at a frequency that is greater than 0 and equal to or lower than 0.4 to convey and disperse a plurality of granular materials in the predetermined direction. Is.

According to the granular material spreading | diffusion apparatus of this invention, a granular material can be spread | dispersed uniformly with sufficient quantitative property with respect to the continuously conveyed base material in the width direction of this base material.
Moreover, according to the manufacturing method of the granular material containing article of this invention, the granular material containing article by which the granular material was spread | dispersed uniformly with sufficient quantitative property in the width direction of a base material can be manufactured efficiently.

FIG. 1 is a side view schematically showing an embodiment of the powder particle distribution device of the present invention. FIG. 2 is a front view schematically showing a state in which the granular material spraying device shown in FIG. 1 is viewed from the downstream side in the conveyance direction of the granular material by the conveyance scattering unit. FIG. 3 is a perspective view of a hopper in the granular material spraying device shown in FIG. 1. FIG. 4 is a side view schematically showing the discharge port of the hopper and the vicinity thereof in the granular material spraying device shown in FIG. 1. FIG. 5 is a graph showing a calibration curve obtained from the relationship between the amount of powder and the amplitude of powder on the receiving part. FIG. 6 is a graph showing the relationship between the slope of the calibration curve shown in FIG. 5 and the frequency of the vibration generating unit. FIG. 7 is a graph showing the relationship between the value of the slope of the calibration curve shown in FIG. 6 as the amount of change and the frequency of the vibration generating unit. FIG. 8 is an enlarged graph showing an area where the vertical axis (absolute amount of change) of the graph of FIG. 7 is 0.6 or less.

Hereinafter, the present invention will be described based on a preferred embodiment thereof with reference to the drawings.
As shown in FIG. 1, the granular material spraying apparatus 1 according to the present embodiment includes a storage unit 20 that can temporarily store the granular material P therein, and an exhaust that discharges the granular material P in the storage unit 20. The outlet 23 and the hopper 2 provided with the moving path 22 for the granular material connecting between the storage unit 20 and the outlet 23 and the outlet 23 are arranged with a gap therebetween. The transporting and dispersing unit 3 that transports the granular material P discharged from the substrate in a predetermined direction and sprays it onto the continuously transported base material 100, and the total weight of the granular material stored in the hopper 2 and the hopper 2. The measuring device 50 that continuously measures, the amount of change per unit time of the total weight is measured by the measuring device 50, and the amount of spraying of the granular material sprayed by the transport spraying unit 3 is the unit time According to the amount of change, the transport capacity of the transport spray unit 3 is adjusted so as to match the target spray amount per hit. And a control unit 40 for control. The base material 100 can be continuously transported by a known transport device such as a transport roll as shown in FIG. 1 or a belt conveyor. In addition, the base material 100 and its conveying apparatus do not constitute the powder particle distribution apparatus 1.

  As shown in FIG. 1, in the granular material spraying device 1, the hopper 2 includes a carrier spraying unit 3 (receiving unit 30) fixed on the base plate 4 by a support member 5 erected on the base plate 4. It is fixed at the upper position.

  In the granular material spraying apparatus 1, the hopper 2 has an upper bottom as a lower base when viewed from the side as shown in FIG. 1, that is, when viewed from a direction orthogonal to the conveying direction X of the granular material P by the conveying and scattering unit 3. The storage unit 20 has a longer trapezoidal shape, and a rectangular parallelepiped discharge unit 21 connected to the lower end of the storage unit 20 and having a rectangular shape in a side view. The storage unit 20 has a space in which the powder particles P can be stored, and the powder particles P can be temporarily stored in the internal space. The granular material P is supplied from the upper opening of the storage unit 20 to the internal space of the storage unit 20 by the granular material supply device 90. The discharge part 21 has the moving path 22 for powder bodies inside. At the lower end of the discharge unit 21 (the end opposite to the storage unit 20 side), a discharge port 23 for the granular material P is formed, and the internal space of the storage unit 20 and the discharge port 23 are divided into particles. It communicates via the body movement path 22. With such a configuration, the hopper 2 can discharge the powder P stored temporarily inside the discharge port 23 via the powder moving path 22.

  The hopper 2 will be described in detail. In the granular material spraying apparatus 1, as shown in FIGS. 1 and 3, the inner wall 20i that defines the internal space of the storage unit 20 extends in a direction in which a part thereof intersects both the horizontal direction and the vertical direction. This is the inclined inner wall 20is. The remaining portions of the inner wall 20i are all vertical walls extending in the vertical direction perpendicular to the horizontal direction. Specifically, as shown in FIG. 3, the internal space of the storage unit 20 that stores the granular material P is defined by three inner walls 20 i and one inclined inner wall 20 is. 20i and the inclined inner wall 20is are respectively connected to the inner wall 21i that defines the moving path 22 for the granular material. Of the inner wall 20i and the inclined inner wall 20is, the most downstream side in the transport direction X or All of the remaining three inner walls 20i except for one inclined inner wall 20is located on the most upstream side are vertical walls extending in the vertical direction. When the hopper 2 has such a structure, when the aggregate of the granular material P flows from the storage unit 20 to the discharge unit 21, the central portion in the direction orthogonal to the flow direction of the aggregate is more than the surrounding portion. Since the increase in the flow rate is suppressed, it is advantageous for uniform dispersion of the powder P.

  Moreover, in the granular material spreading | diffusion apparatus 1, as shown in FIG.1 and FIG.3, the discharge part 21 has all the inner walls 21i which define the moving path 22 for granular materials in the perpendicular direction orthogonal to a horizontal direction. It is a vertical wall that extends. In other words, the moving path 22 for the granular material that is the internal space of the discharge unit 21 is the same with respect to the transport direction X from the end of the discharge unit 21 connected to the storage unit 20 toward the discharge port 23. It has a rectangular parallelepiped shape extending in the length and extending in the same length with respect to the width direction Y orthogonal to the transport direction X. Therefore, in the granular material spraying apparatus 1, the hopper 2 is configured so that the length of the upper base of the storage unit 20 is longer than the length of the discharge port 23 in the transport direction X and the width direction Y as shown in FIG. The length of the upper base of the storage unit 20 is the same as the length of the discharge port 23. With this structure, the hopper 2 can easily and stably discharge the particulate matter P from the discharge port 23.

  Moreover, in the granular material spreading | diffusion apparatus 1, the discharge port 23 is the length of the width direction Y orthogonal to the conveyance direction X of the granular material P by the conveyance distribution part 3 (refer FIG. 1) like the perspective view shown in FIG. The length W is longer than the length D in the transport direction X. The plan view shape of the discharge port 23 (the cross-sectional shape in the direction orthogonal to the discharge direction of the powder P) has a considerable influence on the flow of the powder P in the powder moving path 22 in the discharge unit 21. Therefore, when the shape is a rectangular shape or a shape equivalent thereto, that is, “a shape that is long in one direction”, compared to the case of a perfect circle shape or a square shape, The flow is likely to be steady. As shown in FIG. 3, in the granular material spraying apparatus 1, a size relationship of “length W in the width direction Y> length D in the transport direction X” is established at the discharge port 23. The ratio between the length W and the length D of the discharge port 23 is preferably 2 or more, more preferably 5 or more, and preferably 1000 or less, more preferably 100 or less, more specifically, as W / D. , Preferably 2 or more and 1000 or less, more preferably 5 or more and 100 or less. The length W means the maximum length of the discharge port 23 in the width direction Y.

  In the granular material spraying apparatus 1, the moving path 22 for granular material is transported as shown in FIG. 4 from the viewpoint of uniformly spraying the granular material P in the width direction Y on the substrate 100 with good quantitativeness. The length D in the direction X is 2 times or more and less than 5 times the maximum particle diameter r of the granular material P (2r ≦ D <5r). If the length D in the transport direction X of the powder moving path 22 is less than twice the maximum particle diameter r of the powder P, the powder P may be clogged in the powder moving path 22. There is. Further, when the length D in the transport direction X of the granular material moving path 22 is 5 times or more the maximum particle diameter r of the granular material P, the flow of the granular material P in the granular material moving path 22 is a steady flow. There is a risk that it will be difficult to convert. The length D in the conveyance direction X of the moving path 22 for the granular material is preferably 3 times or more and less than 4 times (3r ≦ D <4r) based on the maximum particle diameter r of the granular material P.

  In addition, the maximum particle diameter r of the granular material P can be measured by a well-known method. Known measurement methods include, for example, dry sieving method (JIS Z8815-1994), dynamic light scattering method, laser diffraction method, centrifugal sedimentation method, gravity sedimentation method, image imaging method, FFF (field flow fractionation). ) Method, electrostatic detector method, Coulter method and the like. Among these, it is preferable from the viewpoint of reproducibility and accuracy to employ the maximum particle diameter r measured by the laser diffraction method or the Coulter method. In particular, when the shape of the target granular material P is indefinite, or when the particle diameter of the granular material P is about 5 mm or less, the maximum particle diameter r of the granular material P is measured using a laser diffraction method. Is preferably measured.

  In the granular material spraying apparatus 1, as shown in FIGS. 3 and 4, in the granular material moving path 22, the length H in the discharge direction (vertical direction) of the granular material P is the largest particle of the granular material P. It is formed to be 1 or more times the diameter r (r ≦ H). If the length H of the particle moving path 22 is less than 1 times the maximum particle diameter r of the powder P, the flow of the powder P may not be steady in the particle moving path 22. The granular material P cannot be uniformly dispersed in the width direction Y with respect to the base material 100 with good quantitativeness. The length H of the particulate movement path 22 is preferably 5 times or more (5r ≦ H), more preferably 10 times or more (10r ≦ H), based on the maximum particle diameter r of the powder P. . The upper limit value of the length H of the moving path 22 for the granular material is not limited from the viewpoint of steady flow of the flow of the granular material P, but can be determined from the viewpoint of the appropriate size of the device, For example, it is preferable that the maximum particle diameter r of the granular material P is 100 times or less (H ≧ 100r).

  As shown in FIG. 1, in the granular material spraying apparatus 1, the conveying and scattering unit 3 vibrates the flat plate-shaped receiving unit 30 that receives a plurality of powders P discharged from the hopper 2, and the receiving unit 30. The vibration generating unit 31 is included.

  In the granular material spraying device 1, the transport spraying unit 3 is arranged with a gap G with respect to the discharge port 23 located at the lower end of the hopper 2 as shown in FIG. 1. Specifically, the conveying and scattering unit 3 forms a predetermined gap G between the upper surface 30a of the receiving unit 30, that is, the surface 30a that receives and conveys the granular material P discharged from the hopper 2 and the discharge port 23. Are arranged to be.

  In the granular material spraying apparatus 1, the gap G is formed to be not less than 1 times the maximum particle diameter r of the granular material P (r ≦ G), as shown in FIG. 4. If the gap G between the discharge port 23 of the discharge part 21 of the hopper 2 and the upper surface 30a of the receiving part 30 of the conveying and spreading part 3 is smaller than 1 times the maximum particle diameter r of the powder P, the powder in the gap G P clogging may occur, and the granular material P cannot be uniformly spread in the width direction Y with good quantitativeness on the base material 100.

  In the granular material spraying device 1, the gap G is preferably 1.5 times or more, more preferably 2 times or more, and preferably, based on the maximum particle diameter r of the powder material P, as shown in FIG. Is 10 times or less, more preferably 5 times or less, more specifically 1 to 10 times, preferably 1.5 to 10 times, and more preferably 2 to 5 times. When the gap G is 10 times or less of the maximum particle diameter r of the granular material P, the discharge speed of the granular material P is easily kept constant. In particular, in the case where the conveying / spreading unit 3 includes the vibration generating unit 31, the discharge amount of the granular material P can be controlled by the frequency of the vibration generating unit 31, but the gap G is 10 times or less the maximum particle diameter r. If it exists, since the discharge amount of the granular material P discharged | emitted from the discharge port 23 of the hopper 2 is easy to control, it is preferable.

  In the granular material spraying apparatus 1, the receiving unit 30 is arranged in parallel with the discharge port 23 with a gap G with respect to the discharge port 23 of the hopper 2, as shown in FIG. 1. In the granular material spraying apparatus 1, the receiving unit 30 is configured such that the length W1 in the width direction Y perpendicular to the conveying direction X of the granular material P by the conveying and spraying unit 3 has an outlet of the hopper 2 as shown in FIG. Compared to the length W of the width direction Y of 23, it has a long shape. In the granular material spraying apparatus 1, the receiving unit 30 is flat as shown in FIG. 1 from the viewpoint of appropriately transmitting the vibration generated by the vibration generating unit 31 to the granular material P on the receiving unit 30. A flat plate member having a smooth upper surface 30a is preferable. Although the material of the receiving part 30 which consists of such a flat plate member is not restrict | limited in particular, For example, iron, stainless steel, aluminum, a plastic etc. are mentioned.

  Further, a guide member may be provided on a side edge portion of the receiving unit 30 along the conveyance direction X so as to stand upward from the upper surface 30a (on the hopper 2 side). By providing such a guide member in the receiving portion 30, it becomes possible to more reliably receive the powder P discharged from the discharge port 23 of the hopper 2 by the receiving portion 30, and the received powder Until the particles P are sprayed on the base material 100, it is possible to more reliably retain the particles P on the upper surface 30a without spilling from the upper surface 30a of the receiving portion 30. Therefore, the inconvenience of spraying the powder P from an unexpected direction other than the transport direction X is avoided, and the powder P is uniformly sprayed on the base material 100 from the front end of the receiving unit 30 in the transport direction X. It will surely be done.

  In the granular material spraying device 1, the vibration generating unit 31 is fixed to the lower surface 30b of the receiving unit 30 as shown in FIG. In the receiving unit 30, the part used for receiving and transporting the granular material P (in contact with the granular material P) is a portion located below the discharge port 23 of the hopper 2 and its vicinity (see FIG. 4). ), Where the other parts are basically non-contact parts of the granular material that do not come into contact with the granular material P (see FIG. 1), the vibration generating unit 31 is in the non-contact part of the granular material of the receiving unit 30 It is fixed to the lower surface 30b (see FIG. 1).

  In the powder particle distribution device 1, the vibration generating unit 31 may be anything that can generate a vibration component that can convey the powder P on the receiving unit 30 in the conveyance direction X. For example, a piezoelectric ceramic or the like can be used. Known vibration generating means such as a piezoelectric element and a vibration feeder can be used. Among these, the vibration feeder is preferably used as the vibration generating unit 31 from the viewpoints of the transportability of the powder P on the receiving unit 30 and the uniformity and quantitativeness of the dispersion on the substrate 100.

  In the granular material spraying device 1, the drive frequency f of the vibration generating unit 31 that vibrates the receiving unit 30 is such that the transportability of the granular material P on the receiving unit 30 and the uniformity and quantification of the spraying onto the base material 100, etc. In view of the above, the resonance frequency fr of the granular material spreading device 1 is higher than the resonance frequency fr, and the difference value (f-fr) is preferably 10 Hz or more, more preferably 75 Hz or more, and preferably 175 Hz. Lower, more preferably 150 Hz or less, more specifically, preferably 10 Hz or more and 175 Hz, and more preferably 75 Hz or more and 150 Hz or less. If the value of the difference between the drive frequency f of the vibration generating unit 31 and the resonance frequency fr of the powder particle distribution device 1 is lower than 10 Hz, the transportability of the powder material P on the receiving unit 30 is too strong, There is a possibility that the uniformity and quantitativeness of the spraying onto the substrate 100 may be impaired. In addition, if the value of the difference between the drive frequency f of the vibration generating unit 31 and the resonance frequency of the granular material spreading device 1 is 175 Hz or more, the transportability of the granular material P on the receiving unit 30 is too weak. There is a risk that the quantitativeness of the dispersion on the substrate 100 may be impaired.

  The weighing device 50 is attached to the hopper 2. As the weighing device 50, a device capable of continuously measuring the total weight of the hopper 2 and the powder P stored in the hopper 2 is used. “Measurable continuously” means that the sampling time of the weighing data is 1 second or less. The hopper 2 weighed by the weighing device 50 and the total weight data of the powder P stored in the hopper 2 are transmitted to the control unit 40 every time data is acquired. A specific example of the weighing device 50 is an electric meter, and specifically, a load cell meter, an electromagnetic meter, a tuning fork meter, or the like can be used.

  The control unit 40 has a function capable of controlling the frequency and / or amplitude of the receiving unit 30. Further, the control unit 40 can receive the weighing data transmitted from the weighing device 50. Furthermore, the control unit 40 is connected to the powder / particle supply device 90 installed on the storage unit 20 of the hopper 2, and also controls the supply of the powder / particles to the storage unit 20 by the powder / particle supply device 90. It has a function. As the control unit 40, for example, a computer in which control / processing software is installed can be used.

  In the granular material spraying apparatus 1, the control unit 40 further has a function of controlling the driving frequency of the vibration generating unit 31 that vibrates the receiving unit 30 and the voltage applied to the vibration generating unit 31. In the granular material spraying apparatus 1, the frequency of the receiving unit 30 is controlled by controlling the drive frequency of the vibration generating unit 31 using the control unit 40. Moreover, in the granular material dispersion | distribution apparatus 1, the amplitude N of the vibration generation part 31 is controlled by controlling the voltage applied to the vibration generation part 31 using the control part 40. FIG. That is, in the granular material spraying apparatus 1, the transport capability of the transport spraying unit 3 is controlled using the control unit 40. Specifically, under the control of the control unit 40, when the vibration generating unit 31 is not in operation, the receiving unit 30 is not vibrating, so that the conveyance of the plurality of powder particles P on the receiving unit 30 is stopped or suppressed. . When the vibration generating unit 31 is operated from such a state, when the receiving unit 30 starts to vibrate, the stop or suppression of the plurality of granular materials P on the receiving unit 30 is released, and the plurality of granular materials P are released. While being transported in the transport direction X, it spreads in the width direction Y, and finally falls from the leading end of the receiving direction 30 in the transport direction X in a state of spreading in the width direction Y, as shown in FIGS. It is spread | dispersed on the base material 100 currently conveyed under the receiving part 30 continuously. The amplitude N (%) of the vibration generating unit 31 is a displacement when a voltage is applied to the vibration generating unit 31, and is a value with the displacement when the maximum voltage is applied as 100% (reference).

  Here, in the granular material spraying apparatus 1, the inventor is transported in the transport direction X by the amplitude N (%) of the vibration generating unit 31 and the vibration of the receiving unit 30 and sprayed on the base material 100. The value of the slope m (mg /% · sheet) of the calibration curve obtained from the relationship with the application amount Q (mg / sheet) of the plurality of granular materials P is expressed as the amount of change | m | (mg /% · sheet / Hz), by causing the vibration generating unit 31 to operate at a frequency f (Hz) at which the value expressed as 0.4 or less, the transportability of the granular material P on the receiving unit 30 and the uniform dispersion on the base material 100 It was found that the property and the quantitative property are stable.

  The graph shown in FIG. 5 includes a hopper 2, a conveying / spreading unit 3 having a receiving unit 30 and a vibration generating unit 31, and a control unit 40. The relationship between the amplitude N (%) of the generation unit 31 and the application amount Q (mg / sheet) of the granular material P applied from the receiving unit 30 is plotted. Specifically, in the graph shown in FIG. 5, the vibration generating unit 31 is operated at each driving frequency f (255 Hz, 260 Hz, 300 Hz, 325 Hz, 350 Hz, 375 Hz, 400 Hz, 410 Hz, 425 Hz), and the amplitude N (%). Is a plot of the results of measuring each of the spraying amounts Q (mg / sheet) when the value is changed.

  More specifically, a straight line A1 in FIG. 5 is a linear approximation of a measurement result in which the vibration generating unit 31 is operated at a driving frequency of 255 Hz to plot the amount Q (mg / sheet) of the granular material P (the least square method). Is a calibration curve by a regression line). A straight line B1 in FIG. 5 is a calibration curve of measurement results obtained by operating the vibration generating unit 31 at a driving frequency of 260 Hz, and a straight line C1 in FIG. 5 operates the vibration generating unit 31 at a driving frequency of 300 Hz. It is a calibration curve of measurement results. A straight line D1 in FIG. 5 is a calibration curve of measurement results obtained by operating the vibration generating unit 31 at a driving frequency of 325 Hz, and a straight line E1 in FIG. 5 operates the vibration generating unit 31 at a driving frequency of 350 Hz. It is a calibration curve of measurement results. A straight line F1 in FIG. 5 is a calibration curve of measurement results obtained by operating the vibration generating unit 31 at a driving frequency of 375 Hz, and a straight line G1 in FIG. 5 operates the vibration generating unit 31 at a driving frequency of 400 Hz. It is a calibration curve of measurement results. A straight line H1 in FIG. 5 is a calibration curve of measurement results obtained by operating the vibration generating unit 31 at a driving frequency of 410 Hz, and a straight line I1 in FIG. 5 operates the vibration generating unit 31 at a driving frequency of 425 Hz. It is a calibration curve of measurement results.

  As shown in FIG. 5, at the driving frequency of 255 Hz (straight line A1), it can be seen that there is a proportional relationship in which the application amount Q (mg / sheet) increases when the amplitude N (%) is increased. Similarly, the driving frequency is 260 Hz (straight line B1), the driving frequency is 300 Hz (straight line C1), the driving frequency is 325 Hz (straight line D1), the driving frequency is 350 Hz (straight line E1), the driving frequency is 375 Hz (straight line F1), and the driving frequency is 400 Hz (straight line G1). It can also be seen that, even at the drive frequency of 410 Hz (straight line H1), when the amplitude N (%) is increased, the spray amount Q (mg / sheet) is in a proportional relationship.

  On the other hand, at a driving frequency of 425 Hz (straight line I1), even if the amplitude N is increased, the spread amount Q (mg / sheet) is remarkably small and the powder P tends to be difficult to be conveyed in the conveyance direction X. I understand that there is. In other words, it can be seen that when the drive frequency f of the vibration generating unit 31 is 425 Hz, the spraying amount Q (mg / sheet) of the powder P sprayed from the receiving unit 30 tends to be significantly reduced.

  The graph shown in FIG. 6 shows the relationship between the drive frequency f (Hz) for operating the vibration generating unit 31 and the slope m (mg /% / sheet) of the straight lines A1 to I1 using the powder particle disperser 1. Are plotted. Specifically, the graph shown in FIG. 6 shows the slope m (mg /% / sheet) of the straight lines A1 to I1 at each driving frequency f (255 Hz, 260 Hz, 300 Hz, 325 Hz, 350 Hz, 375 Hz, 400 Hz, 410 Hz, 425 Hz). Is a plot of the value of.

  More specifically, A2 in FIG. 6 is a plot of the slope value of the straight line A1 (drive frequency 255 Hz), and B2 is a plot of the slope value of the straight line B1 (drive frequency 260 Hz). C2 in FIG. 6 is a plot of the slope value of the straight line C1 (drive frequency 300 Hz), and D2 is a plot of the slope value of the straight line D1 (drive frequency 325 Hz). E2 in FIG. 6 is a plot of the slope value of the straight line E1 (drive frequency 350 Hz), and F2 is a plot of the slope value of the straight line F1 (drive frequency 375 Hz). G2 in FIG. 6 is a plot of the slope value of the straight line G1 (drive frequency 400 Hz), H2 in FIG. 6 is a plot of the slope value of the straight line H1 (drive frequency 410 Hz), and I2 is The slope value of the straight line I1 (driving frequency 425 Hz) is plotted.

  From the results shown in FIG. 6, it can be seen that the value of the slope m (mg /% · sheet) of the straight lines A1 to I1 tends to decrease as the drive frequency f (Hz) of the vibration generating unit 31 increases. That is, it can be seen that if the drive frequency f (Hz) of the vibration generating unit 31 is increased, the change in the spray amount Q (mg / sheet) tends to decrease even if the amplitude N (%) is changed. That is, if the vibration generating unit 31 is operated at a driving frequency f (Hz) where the driving frequency f (Hz) of the vibration generating unit 31 is high, the amplitude is suppressed in a state where the change in the spray amount Q (mg / sheet) is suppressed. It can be seen that it is easy to control N (%).

  The graph shown in FIG. 7 uses the powder particle disperser 1 to change the drive frequency f (Hz) for operating the vibration generating unit 31 and the value of the slope m (mg /% · sheet) shown in FIG. Is a plot of the relationship with the value expressed as. Specifically, the graph shown in FIG. 7 represents the value of the slope m (A2 to I2) at each driving frequency f (255 Hz, 260 Hz, 300 Hz, 325 Hz, 350 Hz, 375 Hz, 400 Hz, 410 Hz, 425 Hz) as the amount of change. The values (AB3 to HI3) are plotted. The “value expressed as the amount of change” is a value obtained by dividing the amount of change in the value of the slope m (the value in A2 to I2) at each frequency f by the amount of change in each frequency f. . For example, CD3 shown in FIG. 7 and FIG. 8 represents the absolute value of the value representing the difference (D2−C2) between the value of the slope D2 of 325 Hz and the value of the slope C2 of 300 Hz as the amount of change, and the frequency of the slope D2 ( 325 Hz) and the frequency of the slope C2 (300 Hz) (D2-C2) is obtained by dividing by the absolute value of the value expressed as the amount of change.

  More specifically, AB3 in FIG. 7 is the value representing the amount of change between the value A2 (drive frequency 255 Hz) and the value B2 (drive frequency 260 Hz) of the slope m, and BC3 in FIG. 7 is the value of the slope m. This value represents the amount of change between B2 (drive frequency 260 Hz) and value C2 (drive frequency 300 Hz). CD3 in FIG. 7 is the value representing the amount of change between the value C2 (driving frequency 300 Hz) and the value D2 (driving frequency 325 Hz) of the inclination m, and DE3 in FIG. 7 is the value D2 (driving frequency) of the inclination m. 325 Hz) and the value representing the amount of change between the value E2 (drive frequency 350 Hz). EF3 in FIG. 7 is the value representing the amount of change between the value E2 (drive frequency 350 Hz) and the value F2 (drive frequency 375 Hz) of the slope m as the amount of change, and FG3 in FIG. 7 is the value of the slope m. This value represents the amount of change between F2 (drive frequency 375 Hz) and value G2 (drive frequency 400 Hz). GH3 in FIG. 7 is the value representing the amount of change between the value G2 (drive frequency 400 Hz) and the value H2 (drive frequency 410 Hz) of the slope m as the amount of change, and HI3 in FIG. 7 is the value of the slope m. The amount of change between H2 (driving frequency 410 Hz) and value I2 (driving frequency 425 Hz) is the above-described value.

  As can be seen from FIG. 6, when the value (f−fr) obtained by subtracting the resonance frequency fr (250 Hz) of the powder distribution device 1 from the drive frequency f (Hz) of the vibration generating unit 31 is 10 Hz or less (in FIG. 6). A2 (255 Hz) and B2 (260 Hz) to be shown, too close to the resonance frequency fr (250 Hz) of the granular material spraying device 1, the transportability of the granular material P is too strong, and the spraying amount (mg) relative to the amplitude (N) / Sheet) becomes large, the amplitude control becomes difficult, and the uniformity and quantitativeness of the spraying onto the substrate 100 may be impaired. In addition, when the value obtained by subtracting the resonance frequency fr (250 Hz) of the powder distribution device 1 from the drive frequency f (Hz) of the vibration generating unit 31 is 175 Hz or more (I2 (425 Hz) shown in FIG. 6), The transportability of P is too weak, and there is a possibility that the quantitativeness of the spraying onto the base material 100 may be impaired.

  FIG. 8 is a graph obtained by enlarging the vertical axis of FIG. 7 except for AB3 and BC3 in FIG. 7 based on A2 or B2 where the value (f-fr) is 10 Hz or less. From the result shown in FIG. 8, the present inventors can operate the vibration generating unit 31 at a driving frequency f in which the value expressed as the amount of change is greater than 0 and less than or equal to 0.4, such as DE3 to HI3. It has been found that all of the transportability of the granular material P on the receiving unit 30 and the uniformity and quantitativeness of the dispersion on the base material 100 are satisfied. Further, if the vibration generating unit 31 is operated at a driving frequency f in which the value expressed as the amount of change is greater than 0 and equal to or less than 0.3, the vibration generating unit 31 can be further satisfied. It has been found that it is particularly satisfactory if the vibration generating unit 31 is operated at the drive frequency f.

  In the granular material spraying apparatus 1, as the granular material P sprayed on the base material 100, water-absorbing polymer particles, sugar, PE pellets, PP pellets, PET chips, PC chips, PE granules, PBA beads, etc. Examples include organic powders and inorganic powders such as metal powder, sodium chloride (electrolyte), potassium chloride, calcium chloride, magnesium chloride, glass, and lime. Of these, water-absorbing polymer particles and sodium chloride (electrolyte) are preferred from the viewpoints of the transportability of the powder P on the receiving unit 30 and the uniformity and quantitativeness of dispersion on the substrate 100, and sodium chloride (electrolyte). Is particularly preferred.

  In the granular material spraying apparatus 1, the shape of the granular material P is not particularly limited, and examples thereof include a spherical shape, a meteorite shape, an elliptical shape, an elliptical column shape, a needle shape, and a cubic shape. According to the powder particle distribution device 1, the powder particle P is uniformly distributed in the width direction Y of the base material 100 in the width direction Y even when the particle particle P has a true spherical shape, even if it has a shape other than the true spherical shape. Can do.

  In the granular material spreading | diffusion apparatus 1, as a raw material of the inner wall 20i of the hopper 2 which contacts the granular material P, and the inclination inner wall 20is, it is preferable that the granular material P does not adhere easily. For example, when the powder P has a deliquescent property such as sodium chloride, or a material that is denatured by water absorption such as a water-absorbing polymer, the inner wall 20i and the inclined inner wall of the hopper 2 are used. It is preferable to use a material having a relatively low thermal conductivity as 20is. As the thermal conductivity, it is preferable to use a thermal conductivity of 25 W / m · K or less at the temperature at which the powder P is dispersed. It is because it becomes easy to prevent dew condensation in the hopper 2 by using a material with low thermal conductivity as the inner wall 20i and the inclined inner wall 20is of the hopper 2. The material of the inner wall 20i and the inclined inner wall 20is of the hopper 2 is more thermally conductive than the outer wall that is located on the opposite side of the inner wall 20i and the inclined inner wall 20is and constitutes the outer surface of the hopper 2. It is also possible to select a material with a low value. When such an inner wall 20i and an inclined inner wall 20is having relatively low thermal conductivity are employed in the hopper 2, particularly when a water-absorbing polymer is used as the granular material P, the water-absorbing polymer is absorbed by water absorption. Since it is less likely to cause inconvenience of swelling and sticking to each other, it is preferable from the viewpoint of more surely achieving the effects of the present invention described later. Moreover, as a raw material of the inner wall 20i and the inclined inner wall 20is of the hopper 2, it is preferable that the corrosion caused by the granular material P is difficult to occur. Specifically, for example, stainless steel, glass, zirconia, Examples thereof include ceramic materials such as silicon nitride. Further, for example, a non-conductive material such as a resin powder, and a material that can generate static electricity between the powder particles P or between the powder particles P and the inner wall 20i and the inclined inner wall 20is. When used as P, it is desirable to use a conductive material for the inner wall 20i and the inclined inner wall 20is of the hopper 2. This is because static electricity can be prevented by using a conductive material as the inner wall 20i and the inclined inner wall 20is of the hopper 2. Examples of such materials include metal materials such as stainless steel, aluminum, and copper, conductive ceramics, and conductive materials such as conductive resins.

  Moreover, it is preferable that the inner wall 20i and the inclined inner wall 20is of the hopper 2 have a surface property that allows the powder P to smoothly flow out to the discharge port 23. Therefore, it is preferable that the inner wall 20i and the inclined inner wall 20is of the hopper 2 have a smooth surface and a low dynamic friction coefficient. In particular, it is preferable that the inclined inner wall 20is extending in a direction intersecting both the horizontal direction and the vertical direction has such a property. Specifically, the surface roughness (Ra) of the inner wall 20i and the inclined inner wall 20is of the hopper 2 is a value measured according to JIS B 0601-2001, and is preferably 10 μm or less, particularly preferably 1 μm or less.

  The substrate 100 is preferably a sheet-like substrate, but is not limited to a sheet-like substrate. Examples of the sheet-like base material include non-woven fabrics, resin films, woven fabrics, knitted fabrics, papers, and the like produced by various manufacturing methods, and laminates obtained by laminating a plurality of the same or different materials.

  Moreover, as the base material 100, what laminated | stacked the material and composition which have functionality on the sheet-like material is mentioned. For example, the base material 100 can be formed by applying a heat generating composition containing an oxidizable metal and water on a sheet-like material such as a film or a nonwoven fabric. As an example of such a form, when manufacturing a heat-generating sheet containing oxidizable metal particles and water, particles of a superabsorbent polymer are formed on a sheet-like substrate made of a fiber sheet that is continuously conveyed. And a method of forming a heat generating composition by spraying one or more of metal particles, solid electrolyte, and the like. By disperse | distributing the granular material, such as electrolytes, such as sodium chloride, to the layer of the exothermic composition of this base material 100 using the granular material distribution apparatus of this invention, these granular materials are arrange | positioned in a uniform state. A heating element can be obtained. With such a heating element, it can be expected that excellent heat generation characteristics with less unevenness in heat generation can be obtained. In addition, although the granular material dispersion | spreading apparatus of this invention is preferable in manufacture of a heat generating body, it is applicable also to manufacture of another functional sheet. For example, a water-absorbent sheet can be produced by spraying particles of a highly water-absorbent polymer on a sheet-like substrate made of a continuously conveyed fiber sheet.

  Moreover, when the base material 100 contains the composition containing a water | moisture content, etc., when the granular material spread | dispersed on this base material 100 is difficult to move on this base material 100 immediately after the dispersion | spreading For this, it is important that uniform powder particles are sprayed from the discharge port 23. From this point of view, the powder particle distribution device of the present invention is very useful.

  As an example of a manufacturing method for producing a granular material-containing article by dispersing the granular material P on a sheet-like base material 100 continuously conveyed using the granular material dispersing apparatus 1, particles of an oxidizable metal, When a heat-generating sheet containing water and water is produced, a heat-generating composition is formed by spraying superabsorbent polymer particles, metal particles, solid electrolyte, etc. on a sheet-like base material composed of a continuously conveyed fiber sheet. The manufacturing method of the heat generating body to form is mentioned. By disperse | distributing the granular material, such as electrolytes, such as sodium chloride, to the layer of this exothermic composition using the granular material spreading | diffusion apparatus of this invention, the exothermic body by which these granular material was arrange | positioned in the uniform state is obtained. Can be obtained. With such a heating element, it can be expected that excellent heat generation characteristics with less unevenness in heat generation can be obtained. In addition, although the manufacturing method of the apparatus of this invention and a granular material containing article is preferable in the manufacturing method of a heat generating body, it is applicable also to the manufacturing method of another functional sheet.

  When spraying the powder P on the sheet-like base material 100 that is continuously conveyed using the powder spraying device 1, the powder stored in the hopper 2 through the discharge port 23 of the hopper 2. The granular material P is dropped and sprayed on the receiving unit 30 of the transport spraying unit 3. Then, the vibration generating unit 31 is operated at a driving frequency f at which the absolute value m of change obtained from the slope value of the calibration curve described above is greater than 0 and less than or equal to 0.4. The granular material P is conveyed in a predetermined direction and dispersed on the substrate 100. By operating the vibration generating unit 31 at the frequency to convey the plurality of powder particles P in a predetermined direction, the powder particles P on the receiving unit 30 are uniformly distributed in the width direction on the base material 100 with good quantitativeness. Can be sprayed on. Moreover, in the manufacturing method of the heat generating body using the granular material spraying apparatus 1, the value (f-fr) which deducted the resonant frequency fr of the granular material spraying apparatus 1 from the drive frequency f (Hz) of the vibration generation part 31 is obtained. The granular material P is sprayed in a frequency band higher than 10 Hz and lower than 175 Hz. By spraying the granular material P with the said value, the conveyance property of the granular material P on the receiving part 30, and the uniformity and quantitative property of the distribution to the base material 100 can be improved.

  As the granular material P falls, the storage amount of the granular material P in the hopper 2 gradually decreases. The amount of the granular material P in the hopper 2 is continuously measured by the measuring device 50 in the form of the hopper 2 and the total weight of the granular material P stored in the hopper 2. In the following description, for the sake of simplicity, the total weight of the hopper 2 and the powder P stored in the hopper 2 is also referred to as “hopper-containing powder weight”. Prior to continuous weighing of the hopper-containing powder weight A, it is preferable to measure the hopper-containing powder weight A1 in a fully filled state of the powder P in advance. The weight AF of the granular material P dropped from the hopper 2 can be easily calculated from the calculation of A1-A by measuring the weight A1 including the hopper in the fully filled state of the granular material P in advance. be able to.

  In order to stably disperse the granular material P on the sheet-like base material 100 in a fixed amount, the granular material P dropped on the receiving unit 30 in the transporting and spraying unit 3 is sprayed on the base material 100 in a constant amount. As described above, it is desirable to control the amplitude and frequency of the receiving unit 30. The amplitude and frequency of the receiving unit 30 are determined by the control unit 40 controlling the vibration generating unit 31. Specifically, the control of the vibration generating unit 31 by the control unit 40 is preferably performed according to the following criteria. That is, the control unit 40 continuously measures the hopper-containing powder weight A using the weighing device 50, and calculates the change amount ΔA per unit time of the hopper-containing powder weight A. ΔA is defined by (Aa−Ab) / t. Aa is the weight of the hopper-containing powder at a certain time, and Ab is the weight of the hopper-containing powder after the elapse of time t. Since the weight of the hopper 2 is unchanged, ΔA is equal to the rate of decrease in the weight of the granular material P in the hopper 2. In accordance with this weight reduction rate, the transporting capacity of the transporting and spraying unit 3 is controlled by the control unit 40, and the spraying amount ΔS per unit time of the granular material P sprayed on the base material 100 by the transporting and spraying unit 3 Is made to coincide with the target application amount ΔSt per unit time. In the control of the transport capacity of the transport spray unit 3 by the control unit 40, for example, when ΔA is smaller than ΔSt, the control unit 40 performs control to increase the transport capacity of the transport spray unit 3 and increase the spray amount ΔS. Do. On the contrary, when ΔA is larger than ΔSt, the control unit 40 performs control to reduce the spray amount ΔS by reducing the transport capability of the transport spray unit 3.

  The conveyance capability of the conveyance scattering unit 3 can be changed, for example, by controlling the amplitude and / or frequency of vibration of the vibration generation unit 31 or both. For the control of the vibration generating unit 31 by the control unit 40, for example, a known feedback control method such as P control (proportional control), PI control, or PID control can be employed. The coefficients in these various control methods can be determined by trial and error.

  The weight reduction rate ΔA of the hopper-containing granule weight can be calculated by various methods. For example, the weight of the hopper-containing powder particles is measured every predetermined time t (seconds), and the difference between the measured weight of the hopper-containing powder particles and the weight of the hopper-containing powder particles measured before t (seconds) is calculated. A value obtained by dividing the value by t (seconds) can be defined as a weight reduction rate ΔA. The value of t is preferably 1 second or more and 300 seconds or less. For example, by measuring the weight of the powder containing hopper every 5 seconds, taking the difference between the latest measured value and the measured value 5 seconds ago, and dividing the difference by 5 seconds, the weight reduction rate ΔA is It can be calculated.

  Alternatively, the weight of the hopper-containing powder particles is measured every predetermined time s (seconds), and is measured before the measured weight of the hopper-containing powder particles and t (seconds) (where s <t). A value obtained by calculating a difference from the weight of the hopper-containing powder and dividing the value by t (seconds) can be defined as a weight reduction rate ΔA. Regarding the relationship between s and t, the value of t / s is preferably 1 or more and 3000 or less. Moreover, it is preferable that the value of s is 0.1 second or more and 10 seconds or less. It is preferable that the value of t is 1 second or more and 300 seconds or less on condition that the value of t is larger than the value of s. For example, by measuring the weight of the powder containing hopper every second, taking the difference between the latest measured value and the measured value five seconds ago, and dividing the difference by 5 seconds, the weight reduction rate ΔA is It can be calculated.

  By the way, the hopper-containing powder weight A gradually decreases with the lapse of time for spraying the powder P, but when the powder P is dropped from the lower part of the hopper 2, it is stored in the hopper 2. It is empirically known that there may be a difference in the amount of fall depending on the amount of the powder P. Therefore, in the method of spraying the granular material P using the powder particle spraying device 1, a threshold (for example, a hopper in the fully filled state) with respect to the powder weight A4 in the hopper in the fully filled state of the granular material P When the hopper inner powder weight A3 falls below the threshold value, the hopper inner powder weight A3 is set to the initial set weight, that is, the powder P is full. The granular material replenishment operation for replenishing the granular material P in the hopper 2 is performed until the weight of the granular material A4 in the hopper in the filled state is reached.

  The weight actually measured in this embodiment is the hopper-containing powder weight A (that is, the hopper-internal powder weight A3 + the hopper weight A2), and the hopper weight A2 is the hopper-containing powder when the powder P is empty. Since the particle weight is unchanged, the above-described replenishment operation is performed by setting, for example, a value of 40% by mass of the powder weight A4 in the hopper in the fully filled state of the powder P as a threshold value. When the body weight A is continuously measured and the hopper-containing powder weight A falls below 0.4A4 + A2, which is the threshold value for the measured value, the hopper is mixed until the hopper-containing powder weight A reaches the initial set weight. It is synonymous with performing the granular material replenishment operation which replenishes this granular material in 2. FIG. Note that “when the value falls below 0.4A4 + A2” includes not only the time when the value falls below 0.4A4 + A2, but also the time after the value falls below 0.4A4 + A2. This granular material replenishment operation is performed by issuing an operation command from the control unit 40 to the granular material supply device 90 and supplying the granular material P into the hopper 2 by the granular material supply device 90. In addition, this powder and granule replenishment operation is performed independently of the control of the conveyance capability described above. “Independently performed” is not intended to carry out the powder replenishment operation and the conveyance capacity control operation using separate control systems, and uses only one control system to replenish the granules. Performing the operation and the conveyance capacity control operation by parallel processing is also included.

  As described above, in the method of manufacturing a heating element using the powder particle dispersion device 1, the vibration control unit 32 is used to spread the material on the substrate 100 by the amplitude N of the vibration generation unit 31 and the vibration of the receiving unit 30. The vibration generating part at a driving frequency f in which the value of the slope m of the calibration curve obtained from the relationship with the application amount Q of the granular material P to be applied is greater than 0 and less than or equal to 0.4. 31 is operating. Therefore, the granular material P can be uniformly distributed in the width direction Y of the base material 100 with good quantitativeness on the base material 100 that is continuously conveyed.

  In particular, in the manufacturing method using the granular material spraying device 1, the vibration control unit 32 is used to subtract the resonance frequency fr of the granular material spraying device 1 from the drive frequency f (Hz) of the vibration generating unit 31 ( In the frequency band in which f-fr) is greater than 10 Hz and smaller than 175 Hz, the vibration generating unit 31 is operated and the granular material P is dispersed. Therefore, it is possible to improve the transportability of the granular material P on the receiving unit 30 and the uniformity and quantitativeness of dispersion on the base material 100.

The present invention is not limited to the above embodiment and can be modified as appropriate.
The plan view shape of the discharge port 23 in the discharge portion 21 of the hopper 2 is not limited to a rectangular shape as shown in FIG. 3 and can be arbitrarily set, for example, a circular shape, an elliptical shape, a polygonal shape, or the like. it can. However, as described above, the shape of the discharge port 23 in plan view is such that the length in the width direction Y perpendicular to the transport direction X of the powder P by the transport sprinkler 3 is longer than the length in the transport direction X. The “long shape in one direction” is preferable.

  EXAMPLES Hereinafter, the present invention will be described more specifically with reference to examples, but the present invention is not limited to such examples.

[Example 1]
A base material (nonwoven fabric, transport speed 40.95 m / sec) continuously conveyed in one direction using a powder particle spray apparatus (resonance frequency 250 Hz) having the same configuration as the powder particle spray apparatus 1 shown in FIGS. ) Powder particles were sprayed on top.
As the powder, sodium chloride having a maximum particle size of 1000 μm was used. In addition, the maximum particle diameter of the granular material was measured by a dynamic light scattering method, and a laser diffraction / scattering particle diameter distribution measuring apparatus LA950V2 manufactured by HORIBA was used as a measuring apparatus.
A vibration feeder was used as the vibration generating part of the granular material spraying device, and a stainless steel flat plate member having a smooth upper surface was used as the receiving part. The vibration feeder was operated at a drive frequency of 325 Hz, and the weight of the powder particles applied to the substrate was measured at 0.1 second intervals using a commercially available load cell according to a conventional method. This was measured three times while changing the amplitude of the vibration generating portion, and a calibration curve obtained from the relationship between the amplitude of the vibration generating portion and the amount of powder particles was obtained. The amplitude of the vibration generating part was obtained by changing the voltage applied to the vibration feeder. The slope value of the calibration curve was 13.0 (mg /% / sheet), and the value representing the slope value of the calibration curve as the amount of change was 0.22 (mg /% / sheet / Hz).
The plan view shape of the discharge port of the hopper of the powder and particle distribution device was a rectangular shape. The maximum width D in the transport direction X of the hopper moving path was 2 mm, the length H in the discharge direction was 30 mm, and W was 40 mm.

[Example 2]
Sodium chloride was sprayed on the substrate under the same conditions as in Example 1 except that the drive frequency f of the vibration generating unit was 400 Hz. The slope value of the calibration curve was 4.5 (mg /% / sheet), and the value representing the slope value of the calibration curve as the amount of change was 0.03 (mg /% / sheet / Hz).

[Comparative Example 1]
Sodium chloride was sprayed on the base material under the same conditions as in Example 1 except that the drive frequency f of the vibration generating unit was 255 Hz. The slope value of the calibration curve was 376 (mg /% / sheet), and the value representing the slope value of the calibration curve as the amount of change was 37.6 (mg /% / sheet / Hz).

[Comparative Example 2]
Sodium chloride was sprayed on the base material under the same conditions as in Example 1 except that the drive frequency f of the vibration generating unit was 300 Hz. The slope value of the calibration curve was 25.1 (mg /% · sheet), and the value representing the slope value of the calibration curve as the amount of change was 0.48 (mg /% · sheet / Hz).

[Comparative Example 3]
Although the vibration feeder was operated with the drive frequency f of the vibration generating unit being 425 Hz, the transportability was weak and sodium chloride could not be spread on the substrate. That is, the slope value of the calibration curve was 0 (mg /% / sheet), and the value representing the slope value of the calibration curve as the amount of change was also 0 (mg /% / sheet / Hz).

[Evaluation test] About Examples 1-2 and Comparative Examples 1-3, according to a conventional method using a commercially available load cell (manufactured by A & D), the dispersion weight of the granular material on the substrate is 100 seconds at 0.1 second intervals. Measured (N = 1000). The results are shown in Table 1.

As shown in Table 1, in Examples 1 and 2, the difference between the maximum value and the minimum value of the spray amount of the granular material is smaller than in Comparative Examples 1 and 2, and the target spray amount can be obtained. It is clear that the dispersion is excellent in uniformity and quantitativeness.
From the above results, when the value representing the slope of the calibration curve as the amount of change is greater than 0 and less than or equal to 0.4 (mg /% / sheet / Hz), the uniformity and quantitativeness of the spraying of the granular material is It has been found that improvement is effective.

DESCRIPTION OF SYMBOLS 1 Powder body dispersion apparatus 2 Hopper 20 Storage part 21 Discharge part 22 Movement path for powder bodies 23 Discharge port 3 Conveyance part 30 Receiving part 31 Vibration generating part 32 Vibration control part 100 Base material A1-G1 Straight line (calibration curve)
f Driving frequency of vibration generating part fr Resonance frequency m Inclination of straight line (calibration curve) N Amplitude of vibration generating part P Granules Q Amount of spraying powder X X Direction of transport of powder by transporting spraying part Y Width direction (base material width direction) perpendicular to the conveyance direction

Claims (9)

A hopper provided with a storage part capable of temporarily storing the powder particles therein and a discharge port for discharging the powder particles in the storage part, and arranged with a gap with respect to the discharge port, from the discharge port A granular material spraying device including a transporting and spraying unit that transports the discharged powdered material in a predetermined direction and sprays it onto a continuously transported base material,
The conveying / spreading unit includes a receiving unit that receives a plurality of powder particles discharged from the hopper, and a vibration generating unit that vibrates the receiving unit, and operates the vibration generating unit to receive the receiving unit. , The plurality of powder particles on the receiving part can be conveyed in the predetermined direction,
The slope of the calibration curve obtained from the relationship between the amplitude of the vibration generating unit and the amount of the plurality of powder particles that are conveyed in the predetermined direction and dispersed on the substrate by the vibration of the receiving unit. A granular material spraying device that operates the vibration generating unit at a frequency at which a value expressed as a change amount is greater than 0 and equal to or less than 0.4. A weighing device for continuously weighing the total weight of the hopper and the granular material stored in the hopper;
The amount of change per unit time of the total weight is measured by the weighing device, and the amount of the powder particles sprayed by the transport spraying unit is consistent with the target amount sprayed per unit time. Thus, the granular material spreading | diffusion apparatus of Claim 1 provided with the control part which controls the conveyance capability of the said conveyance distribution part according to this change amount. A powder supply device for supplying the powder in the hopper;
When the total weight falls below a threshold, the control unit performs a granular material replenishment operation for replenishing the granular material in the hopper by the granular material supply device until the total weight reaches an initial set weight. The granular material dispersion | spreading apparatus of Claim 2.   The granular material spraying device according to any one of claims 1 to 3, wherein the frequency is 10 Hz or more higher than a resonance frequency of the granular material spraying device.   The granular material spraying device according to any one of claims 1 to 4, wherein the gap is 1 to 10 times the maximum particle diameter of the granular material. A method for producing a granular material-containing article, wherein the granular material discharged from the hopper is conveyed in a predetermined direction and dispersed on a substrate that is continuously conveyed, thereby producing an article including the granular material. And
Using a receiving and receiving unit that receives a plurality of powder particles discharged from the hopper, and a conveying and dispersing unit that vibrates the receiving unit,
A calibration curve is obtained from the relationship between the amplitude of the vibration generating unit and the amount of the plurality of powder particles dispersed on the base material due to the vibration of the receiving unit, and the value of the slope of the calibration curve with respect to the resonance frequency is obtained. A change amount absolute value expressed as a change amount is obtained, and the receiving unit is vibrated by operating the vibration generating unit at a frequency at which the change amount absolute value is greater than 0 and equal to or less than 0.4. The manufacturing method of the granular material containing article which conveys several upper granular material. Using a weighing device that continuously weighs the total weight of the hopper and the granular material stored in the hopper,
The amount of change per unit time of the total weight is measured by the weighing device, and the amount of the powder particles sprayed by the transport spraying unit is consistent with the target amount sprayed per unit time. Thus, the manufacturing method of the granular material containing article of Claim 6 which operates the said vibration generation part according to this variation | change_quantity, and controls the conveyance capability of this conveyance distribution part. Using a granular material supply device for supplying the granular material into the hopper,
When the total weight falls below a threshold value, the granular material is contained in the hopper according to claim 6 or 7, wherein the granular material is replenished in the hopper until the total weight reaches an initial set weight. Article manufacturing method.   The manufacturing method of the granular material containing article of any one of Claims 6-8 which act | operates the said vibration generation part by the frequency 10Hz or more higher than a resonant frequency.