JPH018481Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a powder bagging device.

Since the powder supplied into the bag contains a large amount of air, simply pouring the powder into the bag will not
(b) The actual amount stored in the bag decreases and the bag cost increases.
(b) Vibrations during transportation cause the air in the powder to escape, making the shape of the bags unstable, making it impossible to stack them one on top of the other, leading to problems such as high transportation costs. Conventionally, vibration methods and internal deaeration methods are known as means for dealing with such problems.

In other words, the vibration method uses a vibrator to vibrate the bag's placement plate, thereby forcing the powder downward under its own weight while allowing air to escape upward from the powder inside the bag. . However, when the powder is fine, the vibration causes the powder to fly up, making it difficult to effectively degas the air.

In addition, the internal degassing method involves inserting an open-celled foam cylinder with a bottom inside the powder bag and vacuuming the inside of the cylinder to remove the air inside the powder to the outside of the bag. It is something. However, the suction effect only reaches near the periphery of the cylinder, and deaeration performance is insufficient.
In addition, the fine pores of the cylinder tend to become clogged, making it difficult to efficiently degas the powder in response to the pulverization of the powder.

The present invention was developed in view of the above-mentioned circumstances, and its purpose is to make degassing effective and efficient regardless of the particle size of the powder by devising a degassing means. do.

The characteristic structure of the powder bagging device according to the present invention for achieving this purpose is as follows: A bag accommodating device for accommodating bags for powder filling; a drive mechanism that rotates at high speed as a center; a powder supply tube inserted into the bag through the upper end opening of the bag accommodated in the bag accommodating device at a location corresponding to the rotation axis of the bag accommodating device; The present invention includes a drive mechanism that gradually moves the powder supply tube upward from a state where the lower end supply port is located at the bottom of the bag while the tool is rotating at high speed.

The effect of this configuration is as follows.

In other words, when powder is supplied to the bottom of the bag from the lower end supply port of the powder supply tube, the bag is rotating at high speed together with the bag container, so the powder that falls to the bottom of the bag is subjected to centrifugal force and It migrates outward in the direction, is pressed against the inner circumferential surface of the bag, and in this state is deposited along the inner circumferential surface of the bag.

Since the powder is supplied one after another from the lower end supply port of the supply cylinder, it moves radially outward in the same manner as described above. Then, the powder is received by the surface layer of the powder that has already been received on the inner circumferential surface of the bag, and is deposited one after another.

Since the powder supply tube is gradually raised, the powder that is being supplied one after another is kept in a concave shape in the bag, with the surface layer being lower in the center and higher in the periphery. It gradually grows upwards.

Even if the powder is quite fine, the centrifugal force received when the powder supplied from the supply port at the bottom of the supply cylinder falls onto the bottom of the bag is due to the force of the air mixed with the powder. It is much larger than the centrifugal force exerted on the constituent molecules. As a result, when the powder is transferred radially outward, the powder and the air mixed therein are effectively separated. Further, since the powder received on the inner circumferential surface of the bag is continuously subjected to the compaction effect due to centrifugal force, it is compressed to a high density while pushing out the air that it contained without being separated.

According to the present invention having the above-described configuration and operation, the following effects can be achieved.

In other words, instead of eliminating the air in the powder using the vibration method, which has the drawback of easily causing powder to fly up, centrifugal force was applied to the powder, which was interpreted as a centrifugal separation effect between the powder and air. By synergistically with the centrifugal compaction effect on the powder, the air mixed in with the powder is removed from the powder, so the powder is difficult to fly up and can be degassed effectively. Since there is no need to insert a cylindrical body into the powder, even fine-grained powder can be degassed continuously and efficiently. Effective and efficient degassing is possible regardless of particle size.

Embodiments of the present invention will be described below with reference to the drawings.

Reference numeral 1 designates a bottomed cylindrical bag accommodating device for accommodating a bag 2 for filling powder, and is provided with a removable lid 4 having an opening 3 in the center. A is a drive mechanism for rotating the bag accommodating device 1 at high speed around its longitudinal center line as the rotation axis. It consists of a drive shaft 7 fixed to the bottom plate, and a transmission system 8 between the electric motor 6 and the drive shaft 7. The drive shaft 7 is supported by a bearing 9 attached to the frame 5 via bearings 10, 10.
The frame 5 is placed on three or more load detectors 12 such as load cells provided on a base 11. A free roller 13 that is pivotally supported at the upper end of the frame 5 is used to prevent the bag storage device 1 from swinging at high speed, and is attached to a protective band 14 that is wound and fixed near the top end of the bag storage device 1. are in contact. There are three or more free rollers 13, and they are arranged at equal intervals around the rotation axis of the bag container 1.

Reference numeral 15 denotes a powder supply tube that can be raised and lowered and is inserted into the bag 2 through the upper end opening 16 of the storage bag 2 at a location corresponding to the rotation axis of the bag container 1. is slidably fitted onto a fixed powder supply cylinder 18 having a hopper 17 at its upper end, which is mounted on a fixed frame (not shown).
A gap 19 is formed between the powder supply cylinder 15 inserted into the bag 2 and the opening 16 of the bag 2 to allow air inside the bag 2 to escape to the outside during powder supply.

Reference numeral B designates a drive mechanism for gradually moving the elevating powder supply cylinder 15 upward from a state where its lower end supply port 20 is located at the bottom of the bag. It is composed of a drum 22 rotated by an electric motor 21, a wire 23 wound around the drum 22, and the like. The end of the wire 23 is connected to the upper end of the powder supply tube 15 which can be moved up and down. A pulley 24 guides the wire 23 and is attached to the fixed powder supply tube 18. 25 is a shutter attached to the fixed powder supply tube 18 so as to be freely retractable, and 26 is an air cylinder as an actuator of the shutter 25.

27 is a controller, to which the load detector 12... is connected to the input side, and 2 to the output side.
Two electric motors 6, 21 and a cylinder 26 of a shutter 25 are connected.

Next, the operation based on automatic control of the controller 27 of the powder bagging apparatus configured as described above will be explained.

(a) The electric motor 21 is rotated to the side where the wire 23 is fed out, and the elevating powder supply tube 15 is inserted into the bag 2 through the opening 16 of the bag 2, and the lower end supply port 2 is inserted into the bag 2.
0 reaches the inner bottom of the bag 2, the electric motor 21 stops.

(b) Next, the electric motor 6 is excited, and the bag storage device 1 and the storage bag 2 are rotated at high speed. Thereafter, the shutter 25 is opened and the powder 28 is supplied into the bag 2. The powder 28 is subjected to the centrifugal separation action and centrifugal compaction action as described above, and is filled in such a state that its surface layer exhibits a concave curved surface.

(c) When the powder 28 is filled in the bag 2 to the angle of repose as shown in FIG. 1 (this point is known in advance based on experimental data), the motor 21 starts winding the wire 23 It begins to rotate at a low speed toward the taking side, and the powder supply cylinder 15 is gradually raised to the state shown in FIG. 2 and then to the state shown in FIG. 3.

(d) During this time, the signal from the load detector 12 is input to the controller 27, and when the detected load reaches a predetermined value, the shutter 25 is closed, but the powder supply cylinder 15 continues to rise. The powder 28 in the supply tubes 18, 15 below the shutter 25
The entire amount is supplied into the bag 2, resulting in the state shown in FIG. 4, and then the electric motor 21 is stopped.

Incidentally, although reference numerals are written in the claims section of the utility model registration for convenience of comparison with the drawings, the present invention is not limited to the structure of the attached drawings by such entry.

[Brief explanation of the drawing]

The drawings show an embodiment of the powder bagging device according to the present invention, and FIG. 1 is a partially cutaway front view showing the entire device, and FIGS. 2 to 4 show main parts for explaining the operation. It is a partially broken front view shown. DESCRIPTION OF SYMBOLS 1...Bag storage device, 2...Bag, 15...Powder supply tube, 16...Top opening of bag, 20...Lower end supply port of powder supply tube, A...Driving mechanism of bag storage device , B
...The drive mechanism of the powder supply tube.

Claims (1)

[Scope of utility model registration request] A bag accommodating device 1 that accommodates a bag 2 for filling powder, a drive mechanism A that rotates the bag accommodating device 1 at high speed about a center line along the longitudinal direction of the bag accommodating device 1 as a rotation axis, and a rotation of the bag accommodating device 1. The powder supply tube 15 is inserted into the bag 2 through the upper end opening 16 of the bag 2 housed in the bag holder 1 at a location corresponding to the axis, and the powder is This powder bagging device is equipped with a drive mechanism B that gradually moves the powder supply cylinder 15 upward from a state where its lower end supply port 20 is located at the inner bottom of the bag 2.