JP4940178B2 - Method and apparatus for mixing powder particles - Google Patents

Description

  The present invention relates to a powder mixing method and apparatus, and more particularly, from a powder storage tank for laminating and storing a plurality of lots of powder, while reducing variations in powder characteristics between lots, The present invention relates to a method of taking out and mixing particles and an apparatus therefor.

  Conventionally, after supplying multiple batches of granular material sequentially from the top of the hopper or tank that becomes the granular material storage tank, temporarily storing it in the inside, and then removing the granular material from the bottom of the tank as necessary However, when the characteristics of the granular material supplied from the upper part in such a granular material storage tank vary from lot to lot, in such a storage tank, the granular material having such variation However, it is layered and stacked and stored. For this reason, since the granular material discharged | emitted from the bottom part of a storage tank or taken out from a storage tank will be discharged sequentially, reducing the dispersion | variation in the granular material between such several lots. Was extremely difficult.

  In particular, in the casting field, resin-coated sand (RCS) used to mold molds (main molds and cores) is manufactured in units of up to several hundred kilometres and stored in a granular material storage tank. However, since it is difficult to always make the RCS characteristic for each production batch (lot) always uniform, the RCS characteristic for each batch is subtle. Variation cannot be eliminated even in the RCS taken out from the granular material storage tank, and therefore, when a mold is formed using RCS having such a characteristic variation, the mold characteristics are greatly affected. The problem is that it is difficult to mold a mold having uniform characteristics.

  By the way, in the granular material storage tank which stores the granular material which has the dispersion | variation in such a characteristic, in order to eliminate the variation, the mixing apparatus using power, for example, a mixer, a tank with a stirring screw, air for stirring As a storage tank structure using an attached tank or the like, after the powder particles of each lot are sequentially added, the whole powder particles in the storage tank are stirred and mixed, and then the powder particles are taken out from the storage tank. In that case, in order to agitate and mix the entire granular material in the storage tank, the mixing device becomes larger and the storage tank itself becomes larger. In addition, there is a problem that causes great consumption of energy by using power and causes cost increase.

  In order to make the powder particles discharged from the storage tank uniform, Japanese Patent Publication No. 61-5970 discloses a powder having a structure in which a plurality of discharge ports are provided at the bottom of one storage tank. Although a granular storage tank has been clarified, in such a structure, in a granular material taken out from a plurality of granular particle layers laminated in the storage tank and having various characteristics, It has been difficult to sufficiently reduce the variation, and the granular material discharged from the storage tank still has the same characteristics as in the storage tank.

Japanese Patent Publication No. 61-5970

  Here, the present invention has been made in the background as described above, and the problem to be solved is a tank in which a plurality of lots of powder particles are sequentially added, stacked and stored. An object of the present invention is to provide a powder mixing method and apparatus capable of sufficiently reducing variation in powder discharged from a container.

  The present invention can be suitably implemented in various aspects as listed below in order to solve the problems described above or the problems grasped from the description of the entire specification and the drawings. Each aspect described below can be adopted in any combination. It should be understood that aspects or technical features of the present invention are not limited to those described below, and can be recognized based on the description of the entire specification and the inventive concept disclosed in the drawings. It should be.

(1) A rectangular tank body having a longitudinal cross-section having a polygonal shape, the longitudinal direction of which is inclined with respect to a horizontal plane and extending upward, and one ridge line of the polygon is the lowest in the cross-section. In a state where it is inclined to be positioned, a plurality of lots of powder particles are sequentially introduced through the powder particle receiving portion provided at the upper end of the rectangular tubular tank body, and stacked in the tank body, On the other hand, in the ridge line portion located at the lowermost part of the rectangular tubular tank body, the lowermost position of the ridge line and the lowermost position of the ridge line sequentially provided at predetermined intervals along the ridge line. The plurality of outflow parts including the outflow part are configured such that the laminated and stored powder particles are discharged simultaneously, and a plurality of powder particles respectively discharged from the plurality of outflow parts. Gather the flow A mixing method of the granular material, wherein the plurality of granular material flows are mixed .

(2) The angle of the square tubular tank main body with respect to the horizontal plane, together with the inclination angle with respect to the horizontal plane of the bottom wall inner surface on both sides sandwiching the ridge line located at the lowermost portion of the square tubular tank main body, It is set so that it may become larger than the angle of repose of a granular object, and the above-mentioned granular material is allowed to flow down naturally from a plurality of above-mentioned outflow parts, The above-mentioned mode (1) characterized by things How to mix powder.

(3) The method for mixing particles according to the above aspect (1) or (2), wherein the particles are foundry sand or resin-coated sand.

(4) (a) It is provided with a rectangular tank body having a longitudinal cross-sectional shape that has a polygonal shape, and the tank body has a longitudinal direction inclined upward with respect to a horizontal plane and one ridge line of the polygon Is arranged so as to be positioned at the bottom in the cross section, and a granular material receiving portion in which powder particles of a plurality of lots are sequentially added to the upper end portion of the tank body and stacked and stored. In addition, a plurality of outflow portions including a lowermost position of the ridge line and provided at predetermined intervals along the ridge line at a ridge line portion located at the lowermost part of the tank body And (b) the plurality of outflow portions of the granular material storage tank are simultaneously opened, and the granular materials stacked and stored in the tank body are respectively downward from the plurality of outflow portions. an outlet portion opening means which is adapted to be drained, the powder or granular material Tomeso of provided below, particulate material characterized by having a collecting flow means for collecting a plurality of flow of powder and granular material reservoir tank of the plurality of outlet portions respectively flowing out allowed are granular bodies, Mixing equipment.

( 5 ) The mixing of the granular material according to the aspect ( 4 ), wherein the current collecting means is configured by one or a combination of two or more of a hopper, a chute and a belt conveyor. apparatus.

( 6 ) The powder mixing apparatus according to the above aspect (4) or ( 5), wherein the outflow part opening means is configured by valves respectively disposed in the plurality of outflow parts.

( 7 ) The granular material according to any one of the above aspects (4) to ( 6 ), wherein the rectangular tank body has a triangular, quadrangular, or pentagonal cross-sectional shape. Mixing equipment.

  As described above, in the present invention, the tank body in the granular material storage tank has a long rectangular tube shape with a transverse cross section that is polygonal, and the longitudinal direction is inclined upward with respect to the horizontal plane. The ridge line is inclined and arranged so that one ridge line of the polygon is located at the lowermost part in the cross section, and the ridge line is located at the lowermost part of the tank body. From a plurality of outflow portions respectively provided at a lowermost position of the tank and a plurality of positions spaced apart from each other by a predetermined distance along the ridgeline, a plurality of lots of powder particles stacked and stored in the tank body are respectively From the place where it was made to flow out automatically, the granular material will flow out uniformly from each part in the vertical direction of the granular material stacked in the tank body. Yo Te, between a plurality of lots, even if there are variations in the granular material properties, variations in characteristics in the outflow allowed is granular material is to be able to be effectively reduced.

  Further, in the present invention, the inclination angle of the rectangular tube-shaped tank main body with respect to the horizontal plane, together with the inclination angles of the bottom wall inner surfaces on both sides sandwiching the ridge line located at the lowermost portion of the tank main body with respect to the horizontal plane, By setting the angle of repose to be larger than the angle of repose of the granule, each of the granules contained in the tank body flows naturally from the multiple outflow parts provided along the ridgeline at the bottom of the tank body. From the point of being able to squeeze out, there is a feature that can advantageously reduce the dispersion of the discharged granular material without the need for any special device such as a mixing device using power. Can be effectively reduced, and an advantage that the cost of the apparatus can be reduced can be enjoyed.

  In particular, in the present invention, in the case where RCS (resin coated sand) used in the casting field is targeted as the granular material, it is possible to effectively reduce variation in RCS characteristics for each production batch. From the point of view, when molding a mold using such an RCS, a characteristic that a mold having a certain property such as strength and disintegration can be stably produced can be exhibited.

  Hereinafter, in order to clarify the present invention more specifically, embodiments of the present invention will be described in detail with reference to the drawings.

  First, FIGS. 1 to 4 schematically show an example of a tank main body used in the present invention. Specifically, FIG. 1 shows a front view of such a tank body, FIGS. 2 and 3 show its left side view and right side view, respectively, and FIG. The planar form is shown.

  In these drawings, the tank body 2 is a rectangular tube with a long rectangular tube whose cross section in a direction perpendicular to the longitudinal direction is a regular quadrangle, as is apparent from the cross-sectional explanatory views of FIGS. The two end openings in the center line direction, which is the longitudinal direction, have a sealed box structure in which the lower end wall 4 and the upper end wall 6 are respectively closed. Is configured. Moreover, the rectangular tank body 2 has its lower end wall 4 down, and its longitudinal direction (center line direction) is inclined at a predetermined angle: α with respect to the horizontal plane and extends upward. One rectangular ridge line is supported and arranged by using a known appropriate support mechanism or support device so that it is located at the lowermost part in the cross section, and is in an inclined arrangement form. .

  Further, the upper end corner portion in the inclined arrangement form of the tank body 2 is cut off in the horizontal direction, and as shown in FIG. 4, a granular material receiving portion 8 including a triangular opening is formed, A plurality of batches of powder are sequentially fed through the powder receiving unit 8, and as shown in FIG. 5, the powder layers 10 a to 10 d. It is formed every time. Here, a lot generally refers to a part (group) classified by some common characteristic that can be clearly distinguished, and is also referred to as a batch. It means a collection of powders that are produced, processed or processed.

  Furthermore, in the tank body 2 that is inclined and arranged in this way, with respect to the ridge line portion located at the lowermost part, the lowermost position of the ridge line and a position spaced from the ridge line along the ridge line by a predetermined size. A plurality of outflow portions 12 each having a through hole are provided. In other words, here, seven outflow portions 12 are provided at the same interval with the same opening diameter, and the granular material of each of the granular material layers 10a to 10d is discharged from the seven outflow portions 12, respectively. It is supposed to be. In addition, an appropriate number of outflow holes 14 are also provided in the lower end wall 4 of the tank main body 2, and the lower end wall is formed by allowing the powder particles to flow out through the outflow holes 14. Consideration is given so that the granular material does not stay on the inner surface of 4.

  As shown in FIG. 8, the tank body 2 having such a configuration is provided with a roof shutter 16 having a three-surface covering structure configured to cover the surface where the outflow portion 12 and the outflow hole 14 are provided. On the other hand, the plurality of outflow portions 12 and outflow holes 14 provided in the tank main body 2 are closed so as to be accommodated therein, and the outflow of the granular material stored in the tank main body 2 is blocked. Is to be blocked. As shown in the figure, the shutter 16 has a structure in which two flat plates 16a and 16b are abutted at right angles and connected, and one end thereof is closed by a triangular plate 16c having a right isosceles triangle shape. It has been made.

  Therefore, in the tank body 2 having such a configuration, as shown in FIG. 8, the upper end portion of the tank main body 2 is accommodated and overlapped in the shutter 16 to close the outflow portion 12 and the outflow hole 14. A plurality of lots of powder particles are sequentially charged through the powder particle receiving unit 8 and stacked in the tank main body 2 so as to be stored in layers of the powder particle layers 10a to 10d corresponding to the respective lots. (See FIG. 5).

  Next, the shutter 16 shown in FIG. 8 superimposed on the tank main body 2 is moved downward along the longitudinal direction of the tank main body 2 to move the shutter 16 on the ridge line positioned at the lowermost portion of the tank main body 2. The plurality of outflow portions 12 provided are simultaneously opened together with the outflow holes 14 provided in the lower end wall 4, so that the powder particles stacked and accommodated in the tank body 2 can be removed from the outflow portions 12 and the outflow holes 14. At the same time, it will be allowed to drain naturally.

  At that time, the granular materials of each lot stacked and accommodated in the tank body 2 are simultaneously discharged from the outflow portions 12 corresponding to the respective granular material layers 10a to 10d. Because of this, by collecting the granular material flow that flows out from the plurality of outflow portions 12, the powder particles of each lot in the tank body 2 are effectively mixed, Therefore, the variation in the characteristics of the granular material taken out from the tank body 2 can be advantageously reduced.

  In particular, when the granular material flows out of the tank main body 2, in the present invention, the inclination angle α of the tank main body 2 is the horizontal surface of the inner surface of the bottom wall on both sides sandwiching the ridgeline where the outflow portion 12 is provided. The tank main body 2 is inclined and arranged so as to be larger than the angle of repose of the charged granular material together with the inclination angle with respect to. With such an inclined arrangement, when the granular material in the tank body 2 flows out, the granular material is self-weighted from the tank body 2 without requiring any special device such as a mixing device using power. By this, it will be possible to effectively drain naturally.

  By the way, the present invention can also be advantageously implemented in the form as shown in FIG. In this case, appropriate valves 18 such as ball valves are separately provided for the plurality of outflow portions 12 and outflow holes 14, and these individual valves 18 are automatically controlled by an appropriate control device. By controlling the opening and closing, at least the plurality of outflow portions 12 can simultaneously discharge the granular material. In addition, the outflow of the granular material from the outflow hole 14 provided in the lower end wall 4 of the tank main body 2 is appropriately controlled by the control device. And the granular material discharged | emitted from the several outflow part 12 through these each valve | bulb 18 is dropped on the belt conveyor 20 which is one of the current collection means which collects these several granular material flows. In the form in which the plurality of powder flows are mixed, they are moved and transported to the target place.

  In this way, the outflow of the granular material from the plurality of outflow portions 12 is controlled by the automatic opening / closing operation of the individually provided valves 18, thereby simultaneously There is a feature that makes it easier to outflow.

  In addition to the belt conveyor 20 illustrated in FIG. 9, as the current collecting means for collecting the plurality of powder flows from the plurality of outflow portions 12 provided below the tank main body 2, a well-known method is known. Various current collectors can be used, for example, received by a hopper, received by a chute, and a plurality of powder flows are combined to form a granular material aggregate with little variation. It will be provided to the intended use or process.

  As described above, the representative embodiments of the present invention have been described in detail. However, the embodiments are merely examples, and the present invention is not limited to specific descriptions according to such embodiments. It should be understood that this is not to be construed as limiting.

  For example, regarding the cross-sectional shape of the tank body 2, a rectangular cross-sectional shape is employed in the illustrated embodiment, but generally a polygonal shape of about octagonal to decagonal can be employed. Among them, in the present invention, a structure having a pentagonal cross section that can effectively perform storage and outflow of powder particles even in an inclined arrangement form is advantageously employed, an example of which is shown in FIG. 10.

  That is, in the various pentagonal cross-sectional shapes shown in FIG. 10, (a) shows a home base shape used in baseball, and a structure in which an outflow portion 12 is provided at the tip corner portion. In (b), the outflow portion 12 is provided at one ridge line portion in the regular pentagonal cross-sectional shape. Further, in (c), in the home base shape as described above, the tip portion is A structure is shown in which a narrow flat surface is provided, and an outflow portion 12 is provided on the narrow flat surface.

  Further, in order to facilitate the outflow of the granular material stacked and stored in the tank body 2, as described above, the inclination angle α is set to be larger than the repose angle of the granular material. It is desirable to place the tank body 2 in an inclined manner. However, if the tank body 2 is inclined, the outflow of powder particles in the tank body 2 may be further reduced to the ridge line (the outflow portion 12 is disposed). If the inner surface of the bottom wall located on both the left and right sides of the ridge line is inclined, this is possible. It is also possible to add a vibration device that applies vibration. In addition, even if it exists in the inner surface of the lower end wall 4 of this tank main body 2, if it inclines as shown in figure, the outflow of a granular material is possible, but especially the inclination angle with respect to the horizontal surface is set to granular material. If the angle of repose is set to be larger than the angle of repose, the arrangement of the outflow hole 14 with respect to the lower end wall 4 can be omitted.

  Further, even in the plurality of outflow portions 12 provided in the ridge line portion located at the lowermost part of the tank main body 2, the number, size, arrangement intervals, etc. thereof are the same as the size, length, and powder of the tank main body 2. It is appropriately selected according to the type of granule, the amount taken out (outflow amount), the size of the granule lot, etc. In addition to the fixed intervals as in the embodiment, an arrangement form such as a narrow arrangement interval at different intervals in the ridge line direction, for example, on the upper side of the lower side of the tank body 2 is also adopted as appropriate. By the way.

  In addition, the plurality of outflow portions 12 provided in the tank main body 2 are simultaneously opened, and the granular materials stacked and stored in the tank main body 2 are caused to flow downward from the plurality of outflow portions 12 respectively. In the illustrated embodiment, the shutter 16 and the valve 18 are used as the outflow portion opening means to be obtained. However, the present invention is not limited to the illustrated one, and various known openings are available. A device or an opening mechanism can be appropriately employed.

  And in the present invention, as the granular material to which the mixing method and the mixing apparatus as described above are applied, if the granular material is a plurality of lots sequentially put into the tank body 2, the type is particularly Although not questioned, for the purposes of the present invention, such a granular material having a characteristic difference between a plurality of lots, and when it is taken out from the tank body 2, variation in the characteristic difference is reduced. It is preferably applied to what is desired to be done. In particular, in the casting field, the present invention is suitably applied to RCS (resin coated sand) used for mold making, and the RCS characteristics of each production lot (batch) of RCS as such a granular material. Variations can be effectively reduced, so that the properties such as strength and disintegration of the mold to be molded can be advantageously made constant, which can greatly contribute to stable production of the mold. Of course, the present invention is also advantageously applied to other ordinary foundry sands where it is desirable that the characteristic variation is small.

  In addition, although not listed one by one, the present invention can be implemented in a mode with various changes, modifications, improvements, and the like based on the knowledge of those skilled in the art. It goes without saying that any one of them falls within the scope of the present invention without departing from the spirit of the invention.

  Examples of the present invention will be shown below to clarify the features of the present invention more specifically. However, the present invention is not limited by the description of such examples. Should also be understood.

  First, as an example of the present invention, a mixing test of RCS as a granular material was performed using a testing machine in which the rectangular tank body 2 shown in FIGS. The tank body 2 has a square cross-sectional shape with a side of 7 cm, a length in the longitudinal direction of 19 cm, and the outflow portion 12 is constituted by a through hole having a diameter of 3.8 mm. In addition, seven are arranged from the lowest end position of the ridge line at a pitch of 2.5 cm. And such a tank main body 2 is installed in the inclined state which gives an angle ((alpha)) of 45 degrees with respect to a horizontal surface so that it may become more than the repose angle of RCS used as a sample.

  And RCS as a granular material prepares three types, A (brown), B (white), and C (red), which have different hues and masses, and put these three types of samples on the upper end of the tank body 2. The sample (RCS) is simultaneously supplied from the plurality of outflow portions 12 provided at the ridge line portion of the tank body 2 after the RCS: A → RCS: B → RCS: C is charged in order from the provided granular material receiving portion 8. And then collected and stored in a hopper disposed below. When the mixed state in the hopper of the sample (RCS) thus obtained was observed, the three types of RCS were sufficiently mixed so that the hues of RCS: A, RCS: B and RCS: C could not be distinguished. It was confirmed that she was squeezed.

  On the other hand, as a comparative example, a mixing test was performed in the same manner as described above using a conventional testing machine including a rectangular hopper arranged in the vertical direction. That is, after the above three types of RCS (A, B, C) are sequentially added, the sample (RCS) is caused to flow out from the rectangular bottom opening (1 cm × 1 cm) provided at the bottom of the hopper. Then, when collecting and accommodating in a transparent hopper and observing the mixed state, the existence of brown, white and red areas corresponding to the three RCS hues from the bottom to the top is clearly recognized. It was found that the effluent (mixture) could be, and the mixing of the three RCSs was not sufficient.

  In addition, using a tester (example of the present invention) having a tank body 2 inclined and a structure similar to the above and a tester (comparative example) provided with a conventional vertical hopper, three types having different strengths and masses are used. For RCS (RCS1, RCS2, and RCS3), run out and mix in the same way as above, and measure the strength of the test piece obtained from the first half outflow, central outflow and second half outflow of the resulting mixture. Based on this, the degree of mixing was judged.

For each of the three types of RCS used here, five test pieces were prepared, their strength (bending strength) was measured, and an average value thereof was calculated. As a result, RCS1 was 356.7 N / cm ^2. , RCS2 was 627.2 N / cm ² , and RCS3 was 840.8 N / cm ² . In addition, for the sample in which the three types of RCS taken out from the testing machine as described above are mixed, five test pieces are prepared from the first half outflow part, the central outflow part, and the second half outflow part, And the intensity | strength was measured and the result of having calculated those average values is shown in following Table 1. In addition, it measured also about the mass of five test pieces obtained in each said part, those average values were calculated, and the result is shown in following Table 1. The test piece strength measurement method described above is as follows.

-Measurement of test piece strength-
Using RCS corresponding to each outflow part, JIS type test piece (width: 10 mm x thickness: 10 mm x length: 60 mm, firing time: 250 ° C. x 60 seconds) according to JIS-K-6910 And about the obtained JIS type test piece, the intensity | strength was calculated | required by measuring the intensity | strength (N / cm < ² >) according to JACT test method: SM-1.

  As is clear from the results of Table 1, when the three types of RCS are mixed using a tester in which the tank body 2 is inclined as in the present invention example, the conventional vertical type is used. Compared to the comparative example in which three types of RCS are mixed using a tester equipped with a hopper, the variation in strength and mass of the test piece obtained from the flowing sample is effectively improved. From this, it is understood that, by adopting the mixing method according to the present invention, when mixing RCS having different characteristics, the variation in the characteristics can be advantageously reduced.

It is a front schematic explanatory drawing which shows an example of the square cylindrical tank main body used in this invention. It is a left side schematic explanatory drawing of the square cylindrical tank main body shown by FIG. It is a right-side schematic explanatory drawing of the square cylindrical tank main body shown by FIG. It is a plane schematic explanatory drawing of the square cylindrical tank main body shown by FIG. It is a VV cross-section schematic explanatory drawing in FIG. It is VI-VI cross-section schematic explanatory drawing in FIG. It is a VII-VII cross-sectional schematic explanatory drawing in FIG. It is a perspective explanatory view showing the combination form of the rectangular tubular tank main body and the shutter shown in FIG. It is a schematic explanatory drawing which shows an example of the mixing apparatus according to this invention. It is explanatory drawing which shows the other example of the rectangular cylindrical tank main body used for this invention, Comprising: (a)-(c) has shown the example from which all differ in a cross-sectional form.

Explanation of symbols

2 Tank body 4 Lower end wall 6 Upper end wall 8 Granule receiving part 10a to 10d Powder body layer 12 Outflow part 14 Outflow hole 16 Shutter 16a, 16b Flat plate 16c Triangular plate 18 Valve 20 Belt conveyor

Claims (7)

A rectangular tank body having a longitudinal cross-sectional shape with a polygonal shape, the longitudinal direction of which is inclined with respect to a horizontal plane and extending upward, and one ridge line of the polygon is located at the lowermost part in the transverse cross-section. Thus, in the state of being arranged in an inclined manner, a plurality of lots of powder particles are sequentially charged through the powder particle receiving portion provided at the upper end of the rectangular tubular tank body, and stacked and stored in the tank body. In the ridge line portion located at the lowermost part of the rectangular tubular tank main body, the lowermost position of the ridge line and the outflow portion at the lowermost position of the ridge line are sequentially provided along the ridge line at a predetermined interval from the lowermost position. And a plurality of flows of the granular material respectively discharged from the plurality of outflow portions are collected from the plurality of outflow portions. And The mixing method of the granular material, characterized in that Luo plurality of powdery grains flow has to be mixed.   The angle of inclination of the rectangular cylindrical tank body with respect to the horizontal plane, together with the inclination angle of the inner surfaces of the bottom walls on both sides sandwiching the ridge line located at the bottom of the rectangular cylindrical tank body, 2. The mixing of powder particles according to claim 1, wherein the powder particles are set so as to be larger than an angle of repose so that the powder particles are allowed to flow naturally from the plurality of outflow portions. Method.   The said granular material is foundry sand or resin coated sand, The mixing method of the granular material of Claim 1 or Claim 2 characterized by the above-mentioned. A rectangular tank body having a longitudinal cross-section having a polygonal shape, wherein the tank body has a longitudinal direction inclined upward with respect to a horizontal plane and one ridge line of the polygon is The tank body is inclined so as to be positioned at the bottom, and a powder body receiving section is provided at the upper end of the tank body, in which powder bodies of a plurality of lots are sequentially added, stacked and stored, and further the tank A granular material storage tank in which a plurality of outflow parts are provided at a predetermined interval along the ridge line, including a lowermost position of the ridge line, in the ridge line portion located at the lowermost part of the main body,
The plurality of outflow portions of the granular material storage tank are simultaneously opened, and the outflow portions are configured such that the granular materials stacked and stored in the tank main body can flow downward from the plurality of outflow portions, respectively. Opening means ;
A current collecting means provided below the granular material storage tank and collecting a plurality of flows of the granular material respectively discharged from the plurality of outflow portions of the granular material storage tank;
An apparatus for mixing granular materials, comprising: 5. The powder particle mixing apparatus according to claim 4 , wherein the current collecting means is configured by one or a combination of two or more of a hopper, a chute, and a belt conveyor. 6. The apparatus for mixing powder particles according to claim 4 or 5, wherein the outflow part opening means is constituted by valves respectively arranged in the plurality of outflow parts. The said granular cylinder tank main body has the cross-sectional shape of a triangle, a tetragon | quadrangle, or a pentagon, The mixing device of the granular material as described in any one of the Claims 4 thru | or 6 characterized by the above-mentioned.

Images