JPH0457703A - Nozzle shutter device for auger automatic filling machine - Google Patents

Abstract

PURPOSE:To prevent flying in the atmosphere, fusion-bonding or granulation in a shutter of a powdery body from happening by a method wherein a straightener/diffuser consisting of a grating plate with directional property which surrounds a sliding type plate shaped opening/closing valve is provided, and the outside is wrapped by a casing, and a gas to clean the plate shaped opening/closing valve is introduced from the outside of the casing, and an air inlet/outlet from which a gas to clean the plate shaped opening/closing valve is introduced from the casing outside, and guided to a space surrounded by the straightener/ diffuser, and discharged to the outside from a rear stream part in the rectification direction, is provided. CONSTITUTION:When filling is performed, pressurized air introduced from air introducing parts 8, 9 is always fed or fed when a screw auger 2 is stopped, and is evenly rectification- dispersed by straighteners/diffusers 5 consisting of grating plates with direction property, and jetted to the surface of a plate shaped opening/closing valve 4 in the fixed direction as shown by arrows. The jetted air gives impact to an article to be filled accumulated or the surface of the plate shaped opening/closing valve 4, and the article to be filled is discharged from a pressurized air outlet 10, being accompanied with the jetted air. By this method, the article to be filled in a shutter, i.e., the article to be filled accumulated on the surface of the plate shaped opening/closing valve 4 or rectification dispersing plates 5 is totally discharged to the outside of the shutter.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a nozzle shutter device for an auger-type automatic filling machine, which is used when filling containers with powder such as toner.

[Prior Art] The toner used in the electrophotographic image forming method is
It usually contains at least a binder resin and a coloring agent or magnetic powder, has a particle size of 20 μm or less, has excellent scattering and jetting properties, and is fused due to the property of causing plastic deformation when heat or pressure is applied to the binder resin. , has the property of coarsening.

Conventionally, when filling a toner container with the toner using an auger-type automatic filling machine, a shutter having a plate-shaped opening/closing valve connected to a filling machine nozzle has been used as shown in FIGS. 5 and 6. To explain based on this figure, first,
The toner supplied to the funnel 23 through the nozzle 21 by the rotation of the screw auger 22 is supplied to the lower container 30 for a certain period of time when the shutter is open (FIG. 6). At the end of the set time, the screw auger 22 stops rotating, and the funnel 23 is raised several centimeters by the action of an air cylinder (not shown) or the like. In this case, a small amount of toner attached to the inner wall of the funnel may fall due to the vibration when the funnel 23 rises.
scatter. Next, the compressed gas filling the cylinder 29 is removed, and the plate-shaped on-off valve 26 of the shutter device is activated to be in the closed state (FIG. 5). At this time, a portion of the toner adhering to the inside of the nozzle 21 or the funnel 23 often peels off again and falls and accumulates on the plate-shaped on-off valve 26 . Further, when the toner container 30 is replaced with an unfilled one, compressed gas is supplied into the cylinder 29, and the plate-shaped on-off valve 26 is operated to be in the open state as shown in FIG. 6 again.

Here, the toner deposited on the plate-shaped on-off valve 26 is removed to some extent by air that is constantly sucked from the air suction section 28 of the casing 27. However, when the plate-like on-off valve 26 is operated, that is, when compressed air is supplied into the cylinder 29 and the plate-like on-off valve 26 rapidly moves in the opening direction, the toner accumulated on the plate-like on-off valve 26 is removed from the valve. It is dispersed into the atmosphere due to the impact when the body moves. Also,
While repeating the above series of filling operations, toner adheres to and accumulates in the gap between the shutter casing 27 and the plate-shaped on-off valve 26, fuses, and coarse-grained toner is generated, which adversely affects toner quality. .

That is, in the above-mentioned conventional technology, (1) the toner deposited on the plate-shaped on-off valve 26 and the casing 27 of the shutter cannot be completely removed, and the toner that has become fused and coarsened due to repeated opening and closing operations of the on-off valve body; Occur.

(2) When the plate-shaped on-off valve 26 is opened and closed, a portion of the toner deposited on the on-off valve body is blown away into the surrounding atmosphere, which adversely affects surrounding workers and equipment.

[Problems to be Solved by the Invention] It is an object of the present invention to provide a nozzle shutter device for an auger-type automatic filling machine that eliminates the above-mentioned defects, and in particular, to improve the A shutter device connected to the nozzle of the filling machine used when filling containers with powder that has plastic deformation characteristics due to heat or pressure using an auger-type automatic filling machine. It is an object of the present invention to provide a nozzle shutter device for an auger-type automatic filling machine that prevents scattering, fusion of the powder in the shutter, coarsening, etc.

[Means for Solving the Problems] The present invention is characterized in that a screw auger for rotating and conveying the material to be filled is installed inside a nozzle connected to the lower end of a hopper into which the material to be filled is introduced, and In an auger-type automatic filling machine that discharges the material to be filled from a lower end opening of a funnel connected to the funnel and fills it into a container provided below, a passage is provided connected to the lower end opening of the funnel, and a passage is provided in the middle of the passage. A sliding plate opening/closing valve which can be opened and closed and is interlocked to be in an open state when the screw auger is in operation and a closed state when it is stopped is provided, and has directionality so as to surround the plate opening/closing valve. A rectifying and dispersing plate made of a perforated plate is provided, and the outside of the plate is covered with a sink.
Further, an intake/exhaust port is provided for introducing gas for cleaning the plate-shaped on-off valve from the outside of the casing, introducing it into the space surrounded by the rectifying dispersion plate (and discharging it to the outside from the downstream part in the rectifying direction). The main feature is that it is a nozzle shutter device for an auger-type automatic filling machine.

[Example] Hereinafter, the constituent elements and effects of the present invention will be explained in detail in Examples.

An embodiment of the present invention is shown in FIGS. 1, 2, 3, and 4.

The shutter device according to the present invention mainly includes a plate-shaped on-off valve 4, an air cylinder 14 for operating the plate-shaped on-off valve 4,
It consists of a directional perforation plate that uniformly disperses the air supplied from the air introduction parts 8 and 9 of the shutter casing 67 and injects it to the on-off valve 4 at a constant angle with the on-off valve body surface. It is composed of a rectifying and dispersing plate 5, a material to be filled in the shutter, and a suction hood 12 attached to the outer periphery of the discharge port.

Now, the material to be filled conveyed by the rotational movement of the screw auger 2 is discharged from the lower end of the nozzle 1, and is then discharged from the lower end of the nozzle 1.
The liquid then passes through the shutter and is filled into the container 15. During this time, the plate-shaped on-off valve 4 is in the open state (Fig. 2)
. Immediately after the rotation of the screw auger 2 stops, the plate-shaped on-off valve 4 moves from the open position to the closed position by bleeding the compressed air filled inside the air cylinder 14 from the cylinder. (Fig. 1), completely block the passage of the object to be filled. Thereafter, a portion of the material to be filled that has adhered or accumulated on the tip of the nozzle 1 or inside the funnel 3 is peeled off, falls onto the plate-shaped on-off valve 4, and is deposited thereon.

Immediately after the filled container 15 is removed and a new container is set at the discharge port of the shutter, compressed air is introduced into the cylinder 14 and the plate-shaped on-off valve 4 is opened. It is moved to a new position and refilled. The pressurized air introduced from the air introduction parts 8 and 9 is supplied at all times or when the screw auger 2 is stopped, and is uniformly rectified by the rectifying and dispersing plate 5 composed of a directional perforated plate. The air is dispersed and blown out toward the surface of the plate-shaped on-off valve 4 in the direction shown by the arrow in FIG. It gives an impact, and is entrained by the ejected air and exhausted from the pressurized air exhaust port 1O in Fig. 1.As a result, it is deposited inside the shutter, that is, on the surface of the plate-shaped on-off valve 4 or the surface of the rectifier dispersion plate 5, etc. All of the material to be filled is discharged to the outside of the shutter.Therefore, even if this operation is continued repeatedly, the material to be filled will not accumulate inside the shutter.
At least, there is no possibility of fusion or coarsening of the toner to be filled, and since the shutter is sealed with the casing 6.7, the toner can be filled when the plate-shaped on-off valve 4 is operated. There is no scattering outside the system.

In addition, the amount of suction air required to remove the material to be filled inside the shutter shown in the conventional technology shown in Figures 5 and 6 was compared with the amount of pressurized air required by the present invention. case,
It is sufficient that the amount of pressurized air is 172 to 1/3 of the amount of suction air.

Furthermore, the factors that influence the cleanability of the surface of the plate-shaped on-off valve of the shutter device of the present invention include the shape of the opening of the rectifying and distributing plate 5, the jetting speed of pressurized air due to the aperture ratio of the opening, and the jetting angle. etc.

The shape of the openings is, for example, as shown in FIG. 4, and the openings are preferably arranged in a staggered arrangement. In addition, the aperture ratio is 1
~2%, a jetting angle of 30' to 60'' is good, and a jetting speed of 30 to 80 m/sec is good.

For one-component toner with a particle size of at least 20 pm or less, it is preferable to have an aperture ratio of 1.3%, an ejection angle of 45 to 6o°, and an ejection speed of 50 m/sec or more. No granulation was observed. Further, the pressure of the pressurized air supplied to the shutter depends on the aperture ratio of the dispersion plate and the ejection speed, but 70 to 500 mmAg is sufficient.

[Effects of the Invention] As explained above, by using the shutter device of the present invention, (1) The material to be filled does not scatter into the atmosphere from a part of the shutter, improving the working environment and reducing the amount of material to be filled. It can prevent contamination of equipment, product containers, etc. by objects.

■No fusion or coarsening of the filling material occurs within the shutter;
There is no deterioration in the quality of the material to be filled.

There are advantages such as

[Brief explanation of the drawing]

FIG. 1 is a sectional view of the shutter device of the present invention. FIG. 2 is a sectional view showing the positional relationship between the lower part of the shutter and the container when the container is being filled with a material to be filled using the shutter device of the present invention. FIG. 3 is a cross-sectional view showing a state in which pressurized air (arrow) cleans the plate-shaped on-off valve from the rectifying and distributing plate in the shutter device of the present invention. FIG. 4 is a perspective view showing an example of a rectifying and dispersing plate. FIG. 5 is a sectional view of a shutter according to the prior art. FIG. 6 is a sectional view showing the positional relationship between the container and the shutter during a filling operation when a conventional shutter is used. 1... Auger type automatic filling machine nozzle 2... Screw auger 3... Funnel 4... Plate opening/closing valve 5... Rectifier dispersion plate 6.7... Casing 8.9... Addition Pressured air supply port 10...Air exhaust port 11...Packing 12...Suction hood 13...Suction port I4...Air cylinder 15...Container to be filled 21...Auger type automatic filling machine Nozzle 22... Screw auger 23... Funnel 24... Suction hood 25... Suction port 26... Plate opening/closing valve 27... Casing 28... Shutter suction port 29... Air cylinder 30...Container to be filled

Claims (1)

[Claims] (1) A screw auger for rotating and conveying the material to be filled is installed in a nozzle connected to the lower end of the hopper into which the material to be filled is placed, and the material to be filled is discharged from the lower end opening of a funnel connected to the lower end of the nozzle. In an auger-type automatic filling machine for filling a container provided below, a passage is provided in series with the lower end opening of the funnel, and the passage can be opened and closed in the middle of the passage, and when the screw auger is operated, the screw auger can be opened and closed. A slide-type plate-shaped on-off valve is provided which is interlocked to be in a closed state when the plate-like on-off valve is stopped, a rectifying dispersion plate made of a directional perforated plate is provided to surround the plate-shaped on-off valve, and further outside is enclosed in a casing, and gas for cleaning the plate-shaped on-off valve is introduced from the outside of the casing, guided into the space surrounded by the rectifying distribution plate, and discharged to the outside from the downstream part in the rectifying direction. A nozzle shutter device for an auger-type automatic filling machine, which is characterized by being provided with an intake and exhaust port that can be used.