JPS59221279A - Hopper for powdered raw material - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention uses fine powders with strong adhesive and cohesive properties such as lactose,
Joshin powder, pigment, carbon black.

The purpose is to provide a raw material hopper that can continuously discharge agricultural chemicals, silicon dioxide, barium titanate, etc. from the outlet at the bottom.

For the powdered raw materials as described above stored in the raw material hopper, the raw material hopper has an inverted conical shape, and the cone angle is 40.
Even if the inner wall is made extremely smooth, the raw material near the center line of the cone will flow out from the outlet at the bottom.
A cylindrical space, a fragmented rat hole, is formed in the center and the outflow is stopped, and then the clothing layer collapses and CJj
Significant fluctuations occur in the discharge of the material, or the lower part of the inverted cone arches and stops discharge. If a vibrator is placed on the side of the cone to constantly vibrate, the presence of the vertical component of the vibration will cause the cotton density of the raw material in this area to decrease, resulting in a decrease in the fluidity of the raw material. It tends to harden at the upper part of the discharge port, which may obstruct discharge.

When trying to ultra-finely grind raw materials stored in a hopper to a size of several microns or less using a jet mill, etc., fluctuations in the amount of raw material supplied per unit time will significantly affect the fineness of the pulverized product. , the supply of raw material from the raw material hopper to the ultrafine grinder, that is, the raw material u1 from the raw material hopper
It is necessary that the output be continuous and that there be no fluctuation in m M [configuration.

The present invention has an inverted cone-shaped raw material hot spring with an input port at the top and an outlet at the bottom, and vibration (σ) whose locus is a circular motion on a horizontal plane, or the center of the cone. An angular vibration centered on the line is performed to create horizontal sliding between the inner wall of the raw material hopper and the surface of the raw material in contact with it,
This is characterized by reducing the shear friction force acting between the two f).

By doing this, as the raw material flows out from the discharge port at the bottom, the top surface of the raw material continues to gently descend while remaining almost horizontal, achieving a so-called mass flow state, and the discharge fluctuates over time. When things are made, it's rough.f)
, it is possible to completely prevent variations in the particle size structure from one fine particle to the next.

The embodiment shown in Fig. 1 will be explained.Powder raw material 1 is stored inside, supported by several springs 2. Inlet port 4
A discharge port 6 for raw materials and a valve 7 for opening and closing the discharge port 6 are provided at the bottom. The electric shaft Iσ) shaft 8 is located on the center line A-A of the raw material hopper a,
An unbalanced weight 9 is attached to this.

When the electric motor i is started, the unbalanced weight @i9 rotates around the center line A-A, and the centrifugal force acting on it causes each part of the raw material hopper i to vibrate with a circular trajectory in a horizontal plane. Due to this vibration T, horizontal sliding occurs between the inner wall of the raw material hopper i and the surface of the raw material 1 that is in contact with the inner wall of the raw material hopper i, and the friction between the two is significantly reduced. Increase the vibration acceleration (then the raw material 1 will slowly rotate around the center line A-A, and the horizontal slippage between it and the inner wall of the raw material hopper 3 will become larger and larger. %r) If you open it,
Since the friction between the raw material 1 and the inner wall of the raw material potper i is extremely small, the raw material that comes into contact with the inner wall slides down along this, and the raw material 1 continuously flows down from the discharge port 6. The upper surface of the raw material 1 descends while remaining almost horizontal, creating a cylindrical space centered on the center line A-A, and sometimes the upper surface of the raw material falls down like an avalanche.
The raw material does not solidify above the discharge port 6 and prevent the raw material from flowing out from the discharge port 6.

The embodiment shown in FIG. 2 has several electric motors 11a located on a horizontal plane near the center of gravity of the raw material hopper 10 and equally dividing the center angle of the raw material hopper 10 from the center line B-13.
, unbalanced weight 1 rotated in the horizontal plane with flb
2a and 12b. Electric motor 11a
, When llb is started, unparallel M weights 12a, 12b
The phases of rotation of the raw material hopper 10 automatically match, and the centrifugal force acting on these causes circular vibrations of equal radius to occur in each part of the raw material hopper 10 in a horizontal plane.

The embodiment shown in FIGS. 3 and 4 will be described. An inverted overhead conical raw material hopper 16 contains several steel balls 2.
1 a , 21 b , 21 c . . . are supported so as to be able to rotate at four angles around the center line C-C. A connecting rod 26 whose one end is connected to a crank 25 rotated by an electric Nb machine 24 provided externally.
is connected to the other end.

When the N motive 25 is started, the center line C appears in the raw material hopper 20.
-An angular vibration around C occurs.

Almost no angular vibrations around the center line C--C occur in the raw material inside the raw material hopper 20 due to inertia. That is, a horizontal force is generated between the raw material hopper 20 and the raw material in contact with its inner wall, and the friction between the two is extremely small.1. c, the internal raw materials are discharged in a mass flow state.

When implementing the present invention, the unbalanced ia9 rotated by the electric motor 5
Instead, compressed air is blown into the doughnut-shaped space, and a vibrator that rotates the steel balls inside is placed horizontally at the top or bottom of the raw material hopper 1, so that its center is the center of the raw material hopper 1!
i! It is also possible to generate circular vibration in the horizontal plane of the raw material hopper 3 by attaching it in the upper position. In addition, on the side of the raw material hopper B, there is one opening or several openings at the same height in the direction of the radial force with respect to the center line C-C, and this reading is provided with a connection in the direction perpendicular to this. - Attach a magnetic vibrator or electric vibrator to provide the vibration method, and when there are multiple vibrators, make sure that the center line C-CIC opening moment of each vibration force is in the same phase so that the raw material hopper 20 center line C-C of
It is also possible to cause angular vibration around the .

[Brief explanation of the drawing]

Figure 1 is an elevational view of a first embodiment of the present invention, Figure 2 is an elevational view of a second embodiment, and Figures 3 and 4 are an elevational view and a plan view of a third embodiment. . 1 ・・・・・・・・・Powder, @feed 3 ・・・・・・Raw material hopper i ・・・・・・・・・Electric motor 6 ・・・・・・・・・19 Output Mouth 9...
...... Unbalanced weight 10 ...... Raw material hopper 11a, l
lb-4u motive 12a, 12b ---
- Complaint M wheel 20 ...... Raw material hoppers 21a, 21b, 21c ... - Steel balls 24 ...
・・・・・・Electric motor 25 ・・・・・・・・・Crank 26 ・・・・・・・・・One person acting as a substitute for the rod Yu Saito, 1゛゛ㅅ～・2 other people 1 ! l l Figure Ha82 Koji Octopus Figure 3 @ Figure 4

Claims (1)

[Claims] Inlet for powder raw material at the top 4. At the bottom of the inverted conical raw material hopper 3.10゜i with an outlet 6, the powder is characterized by generating circular vibration in the horizontal plane or horizontal sliding in the middle of the horizontal plane. Hopper for raw materials.