JPS59102727A - Granular powder supplying device - Google Patents

Abstract

PURPOSE:To enable enormous volume of granular powder to be precisely measured and supplied by arranging plural pairs of scratching tools each comprising a rough scratching member and a fine scratching member on a rotary table into plural stages, and gradually increasing scratching width as said stages are advanced. CONSTITUTION:A pair of rough scratching members 3-3'' and a pair of fine scratching members 4-4'' are arranged on the upper surface of a rotary table 2 below a granular powder supplying hopper 1, and granular powder supplying ports 5-5'' arranged corresponding to said members along the peripheral edge of the rotary table 2. And, the respective rough scratching members 3-3'' are arranged on the upper stream side in the powder flowing direction on the upper surface of the rotary table 2 for the respective fine scratching members 4-4'', and scratching widths a, b-a', b' of the respective pairs of scratching members 3, 4-3'', 4'' are increased as they advance to their later stages. Hereby, it is possible to precisely measure enormous volume of the granular powder and supply it at a stroke while avoiding complicated processing for excessive granular powder.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a powder supply device using multistage scraping.

As shown in FIG. 1, powder and granules are made to flow down onto the surface of the rotary table from a supply hopper 1 placed directly above the center of the rotary table 2, and are leveled by the first rough scraping member 3, and then the rotary table A device that forms a uniform plane powder layer on a surface, scrapes this uniform plane powder layer with a second-stage fine scraping member 4, and scrapes a certain amount of powder into a powder supply port 5. is known.

This conventional device is superior in that it can relatively accurately supply powder and granules through two stages of scraping operations: coarse scraping and fine scraping. The structure is such that the surplus powder is scraped separately from the periphery toward the container 6 and then returned to the hopper IK, which requires a variety of operations and is not efficient.

Although not shown in the figure, in order to efficiently supply the powder and granular material in a fixed quantity, one coarse scraping member with a large scraping width is placed on the upstream side in the direction of flow of the powder and granular material on the rotary table, and one on the downstream side thereof. The scraping width of the plurality of fine scraping members increases as it goes downstream in the flow direction of the powder and granules. This is also being done.

This method has the advantage of being able to feed multiple quantities of powder and granules at once, but the excess powder and granules generated during rough scraping still need to be returned to the hopper separately, and the fine scraping member in the previous stage still needs to be returned to the hopper. There is an inconvenience that a slight change in width affects the amount of fine scraping in the subsequent stage and often deviates from the purpose of quantitative supply.

) The inventor of the present invention has completed the present invention as a result of numerous studies on the above-mentioned disadvantages of the conventional device, and its main points are: a rough scraping member for forming a uniform powder layer; A plurality of scraping tools, each consisting of a fine scraping member for scraping the uniform powder layer and a pair thereof, are sequentially arranged in multiple stages on the rotating surface of a rotary table, and each stage's scraping tool is placed in a subsequent stage. Accordingly, the scraping width is increased, and each coarse scraping member forms a uniform powder layer with respect to the corresponding fine scraping member, and the excess powder is scraped inward of the table surface as the rotary table rotates. This is a powder supply device that is positioned in a direction that allows the powder to move downstream.

The present invention will be described in detail below with reference to the drawings.

FIG. 2 is a perspective view showing the powder supply device of the present invention,
FIG. 6 is a plan view illustrating the operation of the device of the present invention.

First, in FIG. 2, 1 is a powder supply hopper, 2 is a rotary table, and these are the same as the drawing numbers shown in FIG. 8g1. 3.6' and 3" are rough scraping members, 4.41.4" is a fine scraping member, and 5.5"
, 51 indicates a powder supply port. And these rough scraping members, fine scraping members 3, 4.3', 41.31 and 4.
″ are arranged in pairs on the upper surface of the rotary table 2,
Also, granule supply ports 5, 51 are correspondingly arranged along the periphery of the rotary table.

The volume scraping members 4.4', 4'' are arranged on a line passing through the diameter of the rotary table 20 or in a direction along the vicinity thereof, and are paired with each coarse scraping member 3.31.3. " is arranged at an angle with the volume scraping member.

That is, as is particularly evident in FIG.
1.31 is the rotation of the fine scraping member while maintaining a predetermined gap between the rotating table surface and the rotating table surface at the upstream pressure in the direction of powder flow on the rotating table surface with respect to the fine scraping member 4.41.4'' The inner end K of the table is open in the circumferential direction of the rotary table in contact with the table at different levels, and when viewed in plan, forms a V-shape with the fine scraping member.

Further, a plurality of such a pair of scraping tools, such as a rough scraping member and a fine scraping member, are arranged in stages on the rotary table surface, and each scraping tool has a third scraping tool.
As is particularly clear in the figure, the depth at the rotary table surface,
In other words, the scraping width is arranged so as to increase as it moves toward the rear stage. In other words, the scraping widths a and b of the scraping tool composed of the coarse scraping member 3 and the fine scraping member 4 [in contrast to
Scraping width a1 of the scraping tool consisting of 3' and 4';
b' has a larger width, and 31 and 4'' have even larger widths.

In the powder supply device having such a structure, the powder and granules discharged from the hopper 1 are deposited on a rotary table 2 driven by a motor and a shaft (not shown). By rotating the table 2 in the direction of the arrow, the coarse scraping member 3 is first set at a position that is outside the diameter line of the rotary table and pushes the powder inward of the rotary table. Because of this, it flows inward of the rotary table, and as the table rotates, it moves toward the scraping tool at the later stage.

Next, the powder and granules transferred in this manner are similarly scraped off by the coarse scraping member 3' and the fine scraping member 41 of the next stage. .4° has a longer scraping width than members 3 and 4 in the previous stage, so it is possible to easily scrape the powder and granules in this longer part inside the rotary table. Similarly, the scraping members 6" and 4" can also scrape off the difference in scraping width between the previous scraping tools further inward of the rotary table, and the powder supply ports 5.51. It is possible to supply a fixed amount of powder or granular material all at once as the rotary table rotates.

Furthermore, since the coarse scraping members 3.3'' and 6'' are arranged in the direction of scraping the powder and granules into the inside of the rotary table, the excess powder and granules generated by rough scraping are removed from the surroundings of the rotary table. There is no need to discharge the ashes from the hopper (therefore, there is no need to collect the excess powder and granules in a container and store them in the hopper).

In addition, in a conventional device equipped with one coarse scraping member and multiple fine scraping members on the downstream side, by adjusting the scraping amount of the fine scraping member on the upstream side, fine scraping on the downstream side can also be achieved. However, since the device of the present invention allows excess powder to flow downstream, the amount of scraping can be adjusted within the range of the flowed amount, thereby reducing the effect of adjusting the scraping tool in the previous stage. It is not affected and is advantageous.

In the device of the present invention, the pair of coarse scraping member and fine scraping member do not necessarily have to form a V-shape in plan (the coarse scraping member is used to form a uniform powder layer with respect to the corresponding fine scraping member). At the same time, the excess powder and granules generated by rough scraping are scraped into the rotary table as the rotary table rotates, and positioned in a direction that allows the powder and granules to move downstream. good.

Such direction is preferably at an angle of less than 90° with respect to the springing fine scraping member when the fine scraping member is placed along or near the diameter line of the rotary table.

It is desirable that the phase scraping member in the apparatus of the present invention be able to change the position and adjust the scraping thickness (i.e., the slit between the rotating table and the rotating table) and the scraping width. It is desirable to be able to change and adjust the scraping width.

According to the device of the present invention, by combining a rough scraping member and a fine scraping member, providing a plurality of sets of these, and specifying their arrangement, it is possible to eliminate the similar handling of surplus powder and granules, and to scrape a large number of It is excellent in that it can supply precisely measured powder and granules all at once.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing a conventional powder supply device, Fig. 2 is a perspective view showing an example of the device of the present invention, and Fig. 3 is a part of a rotary table showing the operation of the device in Fig. 2. FIG. 1・・・・・・・・・・・・Powder supply hopper 2・
・・・・・・・・・Rotary table 3.3', 3-
...Rough scraping member 4.4°, 4-...Fine scraping member 5.5°, 5"...Powder supply port Name of patent applicant Toagosei Chemical Industry Co., Ltd.-155

Claims (1)

[Claims] 1. A plurality of scraping tools consisting of a coarse scraping member for forming a uniform powder layer and a fine scraping member paired with this for scraping the uniform powder layer are sequentially placed on the rotating surface of the rotary table. It is arranged in multiple stages, and each stage's scraping tool increases its scraping width as it goes to the next stage, and each coarse scraping member forms a uniform powder layer with respect to the corresponding fine scraping member and rotates the excess powder. A powder supply device that is positioned in a direction that allows the powder to move toward the downstream side by scraping inward of the table surface as the table rotates.