JPS6243955Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is mainly aimed at powder and granular materials whose properties are difficult to supply quantitatively due to adhesiveness, brittleness, coagulability, etc. Regarding a fixed quantity supply device.

A conventional example is shown in FIG. 1 and FIG. 2. 1 is a motor,
2 is a reducer, 3 is a stirring shaft, 4 is an impeller, 5 is a storage tank, 6 is a stirring tank, 7 is a partition wall, 8 is a hole, 9 is a stirring impeller, 10 is fixed to the tank wall 11 of the stirring tank A first scraper, 12 is a supply plate fixed to the stirring shaft 3, 13 is a powder storage part formed on the supply plate 12, 14 is a stirring plate fixed to the upper part of the supply plate 12, and 15 is a cutter formed on the stirring plate. 16 is a discharge tube, 18 is a second scraper provided at the discharge port 17, and 19 is a shielding plate that covers the top of the discharge port 17.

While stirring the powder with the first scraper 10, the impeller 9, and the stirring plate 14, the powder is fed into the storage part 13 through the notch 15 and spread out to the back. In the accommodating portion 13, the granular material forms a layer having a substantially constant thickness that is continuous in the rotation direction. At the second scraper 18, the discharge tube 16 is scraped aside and discharged.

This conventional example has the following problems.

(a) Powder adheres to both the first and second scrapers 10 and 18 and grows. This acts as a simulated scraper, causing a change in the transport cross-sectional area and inhibiting quantitative supply. In addition, the adhering material separates at a certain moment, causing a sudden decrease in the transport cross-sectional area, causing transport troubles.

(b) Accommodation section 1 for the first scraper 10 and supply board 12
3. A phenomenon in which a small lump is trapped between the bottom surface and the bottom surface occurs, and transport is interrupted by the cross-sectional area of the small lump, thereby inhibiting quantitative supply.

The purpose of the present invention is to solve such problems.

The measures (gist structure) taken by this invention for this purpose are as follows:
The following paragraph [] is based on the following paragraph []. In order to facilitate understanding, they will be described with the numbers used in the drawings related to the embodiments to be described later, but this should not be construed as limiting the technical scope of the present invention.

[] In the lower part of the stirring tank 26, the tank wall 31
A first scraper 30 fixed to the first scraper 30, a supply plate 32 rotatably attached to the stirring tank 26 below the first scraper 30, and a tank wall where the powder storage section 33 of the supply plate 32 faces. A second scraper 38 is provided at a discharge port 37 formed at 31.

[] The first and second scrapers 30, 38
The first vibrator 4 is attached to at least one of the
1 is attached thereto, and a second vibrator 42 is attached to the tank wall 31 near the outlet 37. The effect of this structure of [] and [] is as follows.

(A) The first or (and) second scraper 30, 38 to which the first vibrator 41 is attached vibrates in response to the vibration of the first vibrator 41. Therefore, the adhesion of the powder particles to the scrapers 30, 38 is prevented, and the powder particles once attached are peeled off before they start growing (immediately after adhesion).

(B) At the discharge port 37, the flow direction of the granular material in the storage section 33 of the supply plate 32 is forcibly changed by the scraping action of the second scraper 41, so the granular material is compressed, and the second scraper 41 Not only 38 but also
Particles also tend to adhere to the tank wall 31 near the discharge port 37. The second vibrator 42 applies vibration to the tank wall 31 near the discharge port 37. Therefore, adhesion of the powder or granules that would otherwise adhere to the tank wall 31 is prevented, and the powder or granules that have once adhered are peeled off before growth begins (immediately after adhesion).

(C) The combination of (A) and (B) above reduces the factors that change the transport cross-sectional area of powder and granules. Furthermore, there is almost no change in the transport cross section due to vibration.

Thus, the effect of this invention is: (i) to enable accurate, measured supply of powdered or granular material.

(b) Enables smooth supply of powder and granular materials.

(c) The structure for obtaining the effects of (a) and (b) above is simple.

-That is.

Next, embodiments of the present invention will be outlined.

A means for adjusting the frequency and amplitude of the first and second vibrators 41 and 42 is provided so as to cope with changes in the type and properties of the powder and granular material.

In the case of fine powder particles of 100 meshes or more, especially in the case of ultrafine powders such as pigments, high frequency vibration (frequency above the audible frequency range) is suitable. Usually, a range of 50KHz to 100KHz is sufficient.

Regarding the amplitude, 100 microns or less is good.
For ultrafine powder, 10 microns or less is preferable.

The first and second vibrators 41 and 42 may be of any type, but a Sanderch type vibrator (for example, trade name: Langevin vibrator) in which ceramic is sandwiched between metals is particularly suitable.

Next, an embodiment of the present invention will be described based on FIGS. 3 and 4.

21 is a motor with a reducer, 23 is a stirring shaft, 24
is an impeller, 25 is a storage tank, 26 is a stirring tank, 27 is a partition wall, 28 is a hole, 29 is a stirring impeller, 30 is a first scraper fixed to the tank wall 31 of the stirring tank 26, 32
The stirring shaft 2 is located below the first scraper 30.
3 is a fixed supply board, and 33 is a powder storage part formed on the outer periphery of the supply board 32.

The bottom plate part 40 of this housing part 33 is continuous over the entire circumference. On the other hand, the stirring plate 34, which is also the top plate of the accommodating portion 33, has a plurality of notches 35 formed at equal intervals in the circumferential direction.

37 is the tank wall 3 in a state facing the powder storage section 33.
1 is a discharge port, 38 is a second scraper provided at the discharge port 37, and 39 is a shielding plate that covers the top of the discharge port 37. This shielding plate 39 is fixed to the tank wall 31 while being located between the first scraper 30 and the stirring plate 34.

41 is a first vibrator attached to the outer end of the second scraper 38, and 42 is a second vibrator attached to the outer surface of the tank wall 31 in the vicinity of the discharge port 37.

The motor 21 rotates the stirring shaft 23. Stirring shaft 2
The impeller 24, the stirring impeller 29, and the supply plate 32, which are fixed at 3, rotate integrally.

The granular material shaped into a layer of constant thickness in the storage section 33 of the supply board 32 reaches the discharge port 37, where it is scraped off by the second scraper 38 and discharged. Due to the forced change in the flow direction at this time, the powder and granules are compressed, and the second scraper 38
Although the vibrator 41, 4
2, the second scraper 38 and the tank wall 31 are vibrated, thereby preventing their adhesion.

FIG. 5 shows another embodiment. In this case, a first vibrator 41 is attached to the first scraper 30.

FIG. 6 shows another embodiment. In this case, first vibrators 41, 41 are attached to both the first scraper 30 and the second scraper 38.

Regarding the ones in Figures 5 and 6, other configurations are as shown in Figure 1.
This is the same as the embodiment.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing a conventional example, Fig. 2 is a sectional view taken along the - line arrow in Fig. 1, Fig. 3 is a sectional view showing an embodiment of the present invention, and Fig. 4 is a sectional view in Fig. 3. 5 and 6 are cross-sectional views showing different embodiments, respectively. 26... Stirring tank, 30... First scraper, 3
DESCRIPTION OF SYMBOLS 1... Tank wall, 32... Supply board, 33... Powder storage part, 37... Discharge port, 38... Second scraper, 41... First vibrator, 42... Second vibrator.

Claims (1)

[Scope of utility model registration request] A first scraper 30 fixed to the tank wall 31 in the lower part of the stirring tank 26, a supply plate 32 rotatably attached to the stirring tank 26 below the first scraper 30, and a powder supply plate 32 on the supply plate 32. A second scraper 3 provided at a discharge port 37 formed in the tank wall 31 facing the granule storage section 33
8, the first and second scrapers 3
A powder quantitative supply device in which a first vibrator 41 is attached to at least one of 0 and 38, and a second vibrator 42 is attached to the tank wall 31 in the vicinity of the discharge port 37.