JPS5819212B2 - powder filling equipment - Google Patents

Description

[Detailed description of the invention] The present invention relates to a powder filling device.

More specifically, the present invention includes an upper tubular cell for filling with powder, a lower tubular cell having a step in the middle and for installing a plate made of a material other than powder, and A holder whose axial direction is vertical and can be stacked and held; a porous horizontal upper partition plate that can vertically slide inside the tubular upper cell; a horizontal lower partition plate that is secured to the horizontal lower partition plate so that the upper surface of the plate material to be placed substantially coincides with the dividing plane of the upper and lower tubular cells; The present invention relates to a powder filling device characterized in that a passage is formed.

Measuring the shear force, adhesion force (or tensile strength), etc. of powders is useful in research and development of powders, such as foundry sand, and in the design of equipment that handles powders. Measuring the adhesion force with materials other than the body is important for the actual design of the above-mentioned device.

Further, the values of shearing force, adhesion force, etc. are greatly influenced by conditions such as the water content of the powder and the gas atmosphere.

However, it is very difficult to provide these conditions to the powder in a filled cell.

For example, in a square (container-shaped) cell, that is, a Jenike cell, which is often used as a divided cell, the moisture content can be maintained at a certain predetermined value by adding moisture to the powder before filling. Although it can be set up close, it is very difficult to set up the gas atmosphere.

The present invention has been made in view of these circumstances, and particularly provides a powder filling device for a filled cell that can measure the adhesion force between powder and materials other than powder.

One of the main structural features of the present invention is that the lower tubular cell is provided with a step, a horizontal partition plate is secured to this step, and a plate made of a material other than powder is placed on top of the step. The purpose is to place the cell so that its upper surface substantially coincides with the dividing plane of the upper and lower tubular cells.

Another feature of the present invention is that a porous horizontal partition plate is interposed between the inner space of the tubular upper cell and the presser (for compression) member, and yet another feature is that the presser member has the porous holes. This is because a gas flow path is formed that communicates with the outside from the surface adjacent to the horizontal partition plate.

Due to these features, the present invention makes it possible to measure the adhesion force between powder and materials other than powder with a simple configuration, and to uniformly supply gas for adjusting the atmosphere of the powder to the entire powder. Furthermore, the supply can be carried out during the powder compaction process.

The present invention is capable of measuring the adhesion force between powder and other materials such as sawn cloth, metal plates, etc.; however, when the other material is sawn cloth, P
A cloth is placed on a porous horizontal partition plate, and dust is collected on the cloth while being suctioned from below the partition plate to form a powder layer.

It is also possible to measure the adhesion force between the dust and the cloth, which plays an important role in the operation of the dust collector.

Note that the adhesion force with the metal plate is related to the adhesion force between the powder and the wall of a chemical device that handles powder.

Furthermore, since the present invention allows dry air to pass through the powder in the cell, it is possible to easily determine the powder particle diameter or the filling state of the powder by a so-called permeation method.

Further, according to the present invention, since reduced pressure can be applied from the bottom of the filled cell, it is possible to compensate for the compression at the bottom where the compressive force due to pressurization from above is difficult to reach, making it possible to manufacture a filled cell with uniform compression conditions.

Other features and advantages of the invention will become apparent from the description below.

In the present invention, a porous partition plate refers to a plate-like body consisting of one or more stacked plates having pores uniformly perforated on the partition surface that are large enough to allow gas to pass through and hold powder. Preferred examples include a metal plate with pores formed by machining, and a sintered metal plate.

In the present invention, it is used as an upper/lower horizontal partition (or partition) plate above the filled powder (or the space inside the cell) if necessary, and in this case, both the upper and lower sides can slide vertically within the cell. It is desirable that it be designed so that

The present invention will be described in detail below based on the embodiment shown in FIG.

Note that the present invention is not limited to this.

(a) First, before explaining the embodiment shown in FIG. 6, a powder filling device for a cell for measuring adhesion force between powders shown in FIGS. 1 to 5 will be described for reference.

1 and 2, a powder filling device 1 for filling divided cells with powder includes a holder 4 that can hold two cylindrical cells 2゜3 stacked with their axial directions perpendicular to each other, and a cell 2. A porous horizontal upper partition plate 5 consisting of a sintered metal layer 10 and a sintered paper 11 that can vertically slide inside the cell, a holding member 6 that can also slide inside the cell, and the same specifications as the upper partition plate 5. The holder 4 is mainly composed of a porous horizontal upper partition plate 7, and the holder 4 has a gas outlet passage 8 communicating with the entire bottom surface of the lower partition plate 7 from the outside.
Each of the presser members 6 is provided with a gas inlet passage 9 communicating from the outside on the entire upper surface of the upper partition plate 5.

Next, the operation of the powder filling apparatus 1 having the above structure will be explained.

. First, in FIG. 3, cells 2 and 3 are connected to their protruding rods 15
．． By engaging the fixing fittings 19 and 20 with 16, 17, and 1B, they are overlapped so that they do not shift.

Next, the engaged cells 2 and 3 are fitted and inserted into the holder 4, and the sintered metal layer 12 of the porous partition plate 7 and the paper 13 are laid on the bottom of the lower cell 3, and the powder is spread thereon. Inject sample P.

Then, a porous upper partition plate 50 is placed on top of the charged powder sample P.
The paper 11 and the sintered metal layer 10 are placed on top of each other, and a predetermined pressure is applied thereon by the presser member 6.

Next, a pre-adjusted atmosphere gas (for example, air containing a predetermined amount of moisture, or gas containing a component that alters the quality of the powder) is supplied from the gas inflow path 9 to impart a predetermined atmosphere to the powder P.

Note that the gas that has passed through the powder P is released to the outside from the gas outlet path 8.

When the cells 2 and 3 are filled with powder under predetermined conditions as described above, the device 1 is removed as a filled cell S and installed in the measuring device.

For example, as shown in FIGS. 4 and 5, two hanging frames 21 and 22 are arranged side by side, the upper end of which is coaxially supported, and the lower end of which is fixed so that both cells 2 and 3 of the filled cell can move in the same trajectory, One of the hanging frames 22 is made swingable, the other hanging frame 21 is forcibly rotated and tilted gradually, and the outer cell 2 is configured to pull the inner cell 3 through the powder, so that it reaches a certain inclination angle θ. to cut the filled powder.

The tensile force at the time of cutting is measured as the adhesion force of the powder.

In other words, the adhesion force F of the powder is determined by the following equation. F=mg
(sin θ)/S However, F: Adhesive force per unit area of powder m: Weight of inner cell, weight of powder filled in inner cell, etc. θ: Inclination angle at cutting S: Adhesive force per unit area of powder Cross-sectional area g of powder: gravitational acceleration Of course, the filled cell S manufactured as described above can also be used as a sample for shear force measurement.

In addition, in FIG. 2, when the powder P is compressed by the presser member 6, if a vacuum is applied to the gas outlet passage 8 at the same time, the compression of the bottom part of the powder P, where the compression force is difficult to reach, is promoted, and the entire powder is uniform. Compression becomes possible.

(b) Unlike the powder-filled cells described above, the production of a powder-filled cell for measuring the adhesion force between powder and materials other than powder (wood, cloth, metal, etc.) according to the present invention. For example, this is done as follows.

In FIG. 6, 23a is a thin wood board, 12a is a sintered metal plate, and 3a is a stepped portion 2 that holds the sintered metal plate horizontally.
4a, and the other configuration is the same as the example φ in FIGS. 1 to 5 described above.

Therefore, a filled cell with a predetermined atmosphere can be manufactured by installing the filled cell Sa shown in FIG. 6 in place of the filled cell S shown in FIG. 2 and performing similar operations.

Note that the powder filling device 1 can supply dry air to the powder in the filling cells.

Therefore, it becomes extremely easy to measure the particle diameter, which is necessary when calculating the tensile strength (per particle) from the measured value of the adhesion force of the powder.

That is, the particle diameter: d can be determined as follows using the so-called "transmission method".

η: Granularity coefficient of permeated gas L: Thickness of packed bed A: Cross-sectional area of packed bed △P: Pressure difference between both ends of packed bed] Q/l: Flow rate of induced gas ε: Porosity, 4 Brief explanation of the drawing □ Figures 1 to 5 are reference explanatory diagrams for explaining embodiments of the powder filling device according to the present invention, and Figure 1 is a perspective view showing the filling device when measuring the adhesion force between powders, etc. , Figure 2 is a longitudinal sectional view of the device, Figure 3 is a sectional view explaining the assembly of cells used in the device, and Figures 4 and 5 are the adhesion force of powder using the powder-filled cell of the device. FIG. 6 is a side view illustrating measurement and a sectional view showing an embodiment of the powder filling ↓ rule according to the present invention.

□-2a, 3a---Seno, 5a---
Porous horizontal upper partition plate, 7a... Porous horizontal upper partition plate, Sa... Filled cell, 11a...
1 paper, 10a, 12a...Sintered metal plate, 23a
...Thin wood board, 24a...Stepped portion, Pa
・−・・Powder sample.

Claims (1)

[Claims] 1. A tubular upper cell for filling an object, a tubular lower cell with a stepped part in the middle for installing a plate made of a material other than powder, and these tubular cells with their axial directions perpendicular,
A holder that can be stacked and held, a porous horizontal upper partition plate that can be vertically slidable inside the tubular upper cell, and its pressing member, and the upper part of the tubular lower cell that can be slid vertically and locked at the stepped portion, and then placed. The method further includes a horizontal lower partition plate that makes the upper surface of the plate material to be placed substantially coincide with the dividing plane of the upper and lower tubular cells, and further includes a gas flow passage leading to the outside formed in the upper surface of the upper partition plate in the holding part. Characteristic powder filling equipment.