JPH0199987A - Powder filling equipment - Google Patents

Abstract

PURPOSE:To prevent powder from scattering with a simple means in filling into a container, by providing the outer periphery of the filling port with an expandable/shrinkable annular tube, and by allowing the tube to contact the inner surface of the container opening in an expanded state to be filled with powder. CONSTITUTION:The lower-end of a cylinder 10 is provided with an annular tube 50. The tube 50 is supported by a hollow support member 51 so provided as to surround the lower end of a filling chute 2 at the lower end of the cylinder 10; further, fluid such as air is pressed into the tube 50 by a suitable rubber tube 52 and discharged. This annular tube 50 is made of an expandable/ shrinkable material such as rubber and expands at the time of powder supply to contact the opening inner wall of a bag 20, thereby effectively preventing powder supplied into the bag 20 from scattering outside.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a powder filling device, and more specifically, when filling powder into a container, the powder to be filled scatters around and causes environmental damage. The present invention relates to a powder filling device that effectively prevents contamination of the powder.

(Prior Art and its Problems) A device for filling a container such as a bag with a powder product generally has a filling port inserted into the opening of the container to fill the powder product into the container.

In this type of filling device, in order to prevent the powder to be filled from scattering from the opening of the bag-like container, the opening of the bag is tightened from the outside with a clamp, a rubber band, etc. during filling.

However, when such means are used, kinks, creases, etc. occur at the opening of the bag-like container, resulting in dust leakage from these parts, and the method is still unsatisfactory in preventing environmental pollution.

In addition, when transporting powder raw materials or intermediate powder in factories, etc., the powder is simply put into a container from a hopper, and no measures are taken to prevent powder from scattering. It has not been done. For this reason, there is an inconvenience in that a special local exhaust device or the like must be installed within the factory.

(Object of the Invention) Therefore, an object of the present invention is to provide a powder filling device in which the problem of powder scattering can be effectively solved by an extremely simple means when filling powder into a container.

(Structure of the Invention) According to the present invention, in a filling device for inserting a filling port into the mouth of a container and filling powder into the container, a ring-like shape that can be expanded and contracted is provided on the outer peripheral surface of the filling port. There is provided a powder filling device characterized in that a tube is provided, and the tube is in close contact with the inner surface of a container mouth portion in an expanded state to perform powder filling.

(Function) That is, an important feature of the filling device of the present invention is that an expandable and contractible ring-shaped tube is provided on the outer peripheral surface of the filling port.

In this invention, by inflating the ring, the ring is brought into close contact with the inner surface of the opening of the container, thereby keeping the inside of the container in a sealed state.

That is, according to the present invention, the sealed state is not maintained by tightening from the outer peripheral portion of the container opening, but by the expansion of the ring from the inner surface of the container opening. Therefore, when the inflated ring comes into contact with the inner surface of the container opening, no wrinkles, creases, kinks, etc. will occur at the container opening, and the ring and the inner surface of the container opening will be in complete contact with each other, resulting in a good seal. It will be understood that a state is formed.

Moreover, in the present invention, expansion of the ring to form a sealed state is extremely easily performed by introducing a fluid such as gas into the ring.

Thus, according to the present invention, scattering of the powder to be filled can be effectively prevented by extremely simple means.

(Example) The present invention will be described below based on specific examples shown in the accompanying drawings.

1-A to 1-A showing an example of the powder filling device of the present invention
In figure -C, the filling device comprises a chamber 1 and a filling chute 2 extending through the chamber 1. In FIG.

The chamber 2 includes a passage 4 communicating with a pipe 3 connected to a predetermined ventilation mechanism (not shown) and a passage 6 communicating with a pipe 5 connected to a ventilation mechanism (not shown). The passages 4 and 6 are completely separated by a wall 7.

Further, a small-diameter cylinder 10 is formed at the lower end of the chamber 2, and the inner space of the cylinder 10 communicates with the passage 4.

Further, the filling chute 2 extends through the interior of the chamber 1 and also extends through the inner space of the cylindrical body 10, and is configured to slightly protrude from the cylindrical body 10.

The upper end of this filling chute 2 is connected to a powder supply or storage device (not shown) such as a hopper, and a predetermined amount of powder falls down the filling chute 2 and is supplied into a predetermined bag 20. It looks like it will be done.

That is, in order to supply the powder, the cylinder 10 is inserted into the mouth of the bag 20, and the inside of the bag 20 is depressurized in advance by an exhaust mechanism such as a vacuum pump, so that the powder can be easily supplied. I'll leave it as is. In this case, the discharge flow path for the air inside the bag 20 is indicated by the center line A in the drawing.

Further, in this case, it is preferable to provide a partition plate 31 in which a plurality of openings 30 are formed at regular intervals at the lower end of the passage 6. As a result, air is discharged almost uniformly from the space between the opening of the bag 20 and the cylindrical body 10.

After the inside of the bag 20 is in a reduced pressure state, air is sent into the bag 20 through the passage 4 by a blower such as a blower. The ventilation flow path in this case is indicated by arrow A.

This air blowing is for guiding the powder falling from the filling chute 2 into the bag 20 without scattering it during powder supply, and it is sufficient to perform it only when powder supply is started. If this air blowing time is increased or the air blowing pressure is excessively increased, the reduced pressure inside the bag 20 will become almost meaningless, and the powder will be introduced into the bag 20 by the air pressure inside the bag 20. may become difficult.

In this way, a predetermined amount of powder is transferred from the filling chute 2 to the bag 2.
Supplied within 0.

An important feature of the filling device of the present invention is that a ring-shaped tube 50 that can be expanded and contracted is provided at the lower end portion of the cylindrical body 10.

This ring-shaped tube 50 is supported by a hollow support member 51 provided at the lower end of the cylindrical body 10 so as to surround the lower end of the filling chute 2, and is further supported by a suitable rubber tube 52 or the like. Fluid such as air is pressurized into the interior of the housing 50 and discharged therefrom.

Further, the support member 51 is arranged so that the tube 50 is in an expanded state (
The outer surface is curved in order to provide good support even in the case shown in FIG. 1-B).

In the present invention, the ring-shaped tube 50 is made of a material that can expand and contract, such as rubber, and when the powder is supplied, it expands and comes into close contact with the inner wall of the mouth of the bag 20, so that the ring-shaped tube 50 is made of a material that can expand and contract, such as rubber. This effectively prevents the supplied powder from scattering to the outside.

As described above, the tube 50 is expanded and contracted via the rubber tube 52, but the rubber tube 52 is connected to the air blowing mechanism connected to the tube 3 and to the tube 5 through, for example, a suitable valve. All you have to do is connect it to the existing ventilation mechanism.

According to the present invention, the tube 50 is inflated (the state shown in FIG. 1-B) after the bag 20 is brought into a vacuum state. The bag 20 is generally made of a resin material having appropriate flexibility and strength, or has a structure in which a cloth base material is impregnated or coated with the resin material, so that when the tube 50 is expanded, both Almost perfect adhesion is formed between the
Moreover, the bag 20 is firmly supported by the tube 50.

Thus, according to the filling device of the present invention, the opening of the bag 20 is in complete contact with the outer surface of the expanded tube 50 to form a closed state, and leakage or scattering of powder from this portion is completely prevented. Ru.

Another example of the filling device of the present invention is shown in FIG. In this filling device, a ring-shaped tube 62 similar to that described above is provided around the outer periphery of a filling port 61 provided at the lower end of a hopper 60.

That is, the filling port 61 is inserted into the opening 70a of the container 70 to be filled with powder, and in this state the tube 62 is expanded to bring the tube 62 into close contact with the opening 70a. This effectively prevents powder from scattering or leaking from the opening 70a.

In this embodiment, it is preferable that the filling port 61 is provided in the hopper 60 so as to be movable up and down via a bellows 80 or the like, and its height can be adjusted as appropriate using a height adjustment mechanism 81 such as hydraulic pressure or a spring. It is. By employing such a mechanism, it is possible to easily mechanically insert the filling port 61 into the opening 70a of the container 70.

Such aspects of the present invention are effectively utilized when transporting powder raw materials and intermediate powder products in factories and the like.

That is, the scattering or leakage of powder can be reliably prevented by the extremely simple method of installing a ring-shaped tube at the filling port of an existing hopper, etc., and there is no need to provide any large and expensive equipment such as a local ejector. Therefore, environmental pollution can be effectively and reliably prevented.

[Brief explanation of the drawing]

Fig. 1-A is a side view showing an example of the filling device of the present invention, Fig. 1-B is a diagram showing the expanded state of the ring-shaped tube in the device of Fig. 1-A, and Figs. ic-c. is a partially sectional perspective view of FIG. 1-A, and FIG. 2 is a diagram showing another example of the device of the present invention. 1...Chamber 2...Filling chute 20...Bag 50...Ring-shaped tube. Patent applicant: Mizusawa Chemical Industry Co., Ltd. Figure 1-A Figure 1-8 Figure i- (Figure 2' Figure 2

Claims (1)

[Claims] (1) In a filling device for inserting a filling port into the mouth of a container and filling the container with powder, a ring-shaped tube that can be expanded and contracted is provided on the outer peripheral surface of the filling port, and the tube is A powder filling device characterized by being in close contact with the inner surface of a container opening in an expanded state, and filling powder therewith.