JP5680281B2 - Powder quantitative feeder - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a powder quantitative feeder device, and in particular, a powder for accurately conveying a quantitative amount in a minute range of about 1 cc to 1000 cc per hour corresponding to various powders having different physical properties. In particular, it relates to a forced discharge device for the powder.

  Conventionally, except for powders with particularly good fluidity, accurate and quantitative supply of powder in a minute range means that the physical properties of the powder, such as differences in specific gravity, particles, particle sizes, moisture and static electricity It is very difficult work because it is affected by adhesion and cohesiveness caused by the above.

  Conventionally, vibratory feeders, screw feeders, and table feeders are known as fine powder feeders. Of these, vibratory feeders can be used for powders with good fluidity, but applicable powders are limited. In addition, it is required to control the flow manually, and a sufficient amount of control is not possible, resulting in unevenness and poor accuracy. Another major bottleneck is the need to rely on human hands.

  In addition, in the case of screw feeders, both the horizontal and auger types, when the amount of powder to be transported becomes very small, the spiral screw groove becomes inevitably smaller in both width and depth. It becomes easy to cause adhesion and sticking of the powder, and the groove is filled and becomes a rod shape. Conversely, since the amount of the powder is small, the frictional force between the particles is insufficient, slipping and impossible to discharge. More cases.

  Furthermore, in the case of a table feeder, it has been experimentally found that it is the most effective and effective, but sometimes the powder remains in the measuring groove of the supply board and does not discharge, or returns to the container as it is. Will happen.

Application documents for Japanese Patent Application No. 2008-26044 Application documents for Japanese Patent Application No. 2009-32273

  The problem to be solved by the present invention is the powder feeder, which is the most effective table feeder. Finally, the powder is surely and precisely dropped from the measuring groove of the supply board to the discharge part to measure the powder. When a mechanic is used as a technique for solving the situation where powder remains in the groove, vibration may be applied, and the amount of discharged powder may be changed slightly.

In order to solve this problem, a powder quantitative feeder according to the present invention has a powder container, a drive unit installed below the container, and the container from the drive unit. A main shaft protruding into the main shaft, an agitating means which is an L-shaped round bar attached to the main shaft, a supply means attached to the main shaft below the agitating means, and a rotating shaft interlocked with the drive unit And a discharge plate formed below the outer end of the supply plate, and the measurement of the supply plate is provided on the discharge chute. A means for forcibly dropping the powder in the groove with respect to the discharge chute is provided, and the means for forcibly dropping is disposed above a position where the measurement groove of the supply board and the discharge chute overlap. , Point the tip to the discharge chute Atmosphere in the quantitative feeder device of the powder was air pump or a plurality of vacuum pumps hose (tube) is injected from the air nozzle being connected, air nozzle 19 described above, air is injected out into the environment, the powder A structure fitted in an airtight sealing plug 22 that seals between the injection port and the measuring groove so as not to deteriorate the environment by being scattered inside, or to be mixed into a machine component to cause a failure. It is characterized by becoming.

The powder quantitative feeder according to the present invention is characterized in that an inert gas is used instead of air in the air nozzle described above .

  The powder quantitative feeder according to the present invention is configured as described above. For this reason, the powder that enters the metering groove of the supply board can be reliably blown or sucked off by air that is jetted or sucked from the air nozzle, and the powder is scattered around. The agitation means that the powder does not deteriorate and the powder does not enter the machine components and cause a failure, and the powder becomes a bridge in the powder container. Can be prevented.

It is a front view which shows the fixed_quantity | feed_rate feeder apparatus of the powder which concerns on this invention. It is a top view. It is an enlarged view which shows an air blowing inlet part.

  This was realized by configuring as illustrated in the drawings and described in the examples.

  Next, an example of a preferred embodiment of the present invention will be described with reference to the drawings. In these drawings, reference numeral 1 denotes a gantry, and the gantry 1 has a box shape with front and rear opened. A disk frame 2 is provided on the gantry 1, and a gear box is formed on the disk frame 2.

  A driving motor 3 connected to a speed reducer 4 is mounted on the upper surface of one side of the disk frame 2 described above. A gear 5 for transmitting a rotational force is attached to a shaft 4a protruding downward from the speed reducer 4 described above.

  On the other hand, reference numeral 6 in the figure is attached to the disk frame 2 described above, a powder container (hopper) provided with a powder inlet opening at the top and provided with a flange connected to the inlet pipe at the opening edge. The container 6 has a straight cylindrical shape for the purpose of preventing powder bridging, but it can also be formed in a cone shape.

  A drive unit is provided below the container 6, and the drive unit has a stirring shaft (main shaft) 7 having a conical upper end protruding into the central portion of the container 2. A gear 8 for transmitting the rotational force from the gear 5 and rotating the stirring shaft 7 is provided at the lower end of the stirring shaft 7. A transmission gear 9 is provided between the gear 8 and the gear 5. Is intervened.

  In addition, above the stirring shaft 7, a stirring bar 10 made of a round bar formed in a substantially L shape is attached in the container 6. The stirring rod 10 is rotated in synchronism with the stirring shaft 7 so that the powder is constantly stirred so that the powder is not bridged or adhered in the container 6. Further, a partition plate 11 is provided below the stirring bar 10 with a slight gap from the inner wall surface of the storage container 6, and the presence of the partition plate 11 can further prevent bridging and adhesion. .

  On the lower end side of the stirring shaft 7, a supply means 12 for feeding and supplying a predetermined amount of powder into measuring grooves 15a, 15a... ing. Specifically, the supply means 12 includes a plurality of blade bodies 12a, 12a... Provided along the tangential direction of the stirring shaft 7, and pushes the powder by rotation at the tangential side edge of the blade body 12a. The supply means 12 is provided with a ring-shaped guide 12b at the tip end side of the blade bodies 12a, 12a,.

  Further, a gear 13 that transmits the rotational force from the motor 3 is attached below the gear 8 that receives the rotational force of the stirring shaft 7. The gear 13 is meshed with a gear 14 that is coaxial with the transmission gear 9. . The gear 13 is meshed with a gear 17 attached to a rotary shaft 16 provided with a supply board 15 at the upper end to rotate the rotary shaft 16, thereby forcing the supply board 15 to rotate.

  The above-mentioned supply board 15 is formed by a disk, and has a substantially spur gear shape in which measuring grooves 15a, 15a,... The blades 12a, 12a,... Are partly in sliding contact with the upper surface of the supply board 15, and the powder sent by the blades 12a, 12a,. 15a is sent to the inside and the measurement grooves 15a, 15a are filled with powder.

  On the other hand, reference numeral 18 in the figure denotes a discharge chute, and the powder put in the measuring grooves 15a, 15a,... Of the supply board 15 is sequentially dropped from above the discharge chute 18 and discharged. That is, one of the measurement grooves 15a, 15a,... In which the powder on the supply board 15 is placed slides on the upper surface opening of the discharge chute 18, and the powder naturally falls by its own weight.

  An air nozzle 19 for forcibly feeding the powder remaining in the measuring grooves 15a, 15a,... Into the discharge chute 18 is provided above the supply board 15 in sliding contact with the discharge chute 18. The air nozzle 19 has its tip directed toward the upper surface opening of the discharge chute 18 and faces the upper side of the measuring groove 15a.

  The air nozzle 19 is connected to an air pump 20 and two hoses (tubes) 21, 21 placed in the gantry 1, and the air sent from the air pump 20 is discharged to the discharge chute 18, forcibly the measuring groove 15 a, .. Are blown off into the discharge chute 18. The powder remaining in the measuring grooves 15 a, 15 a.

  Further, the air nozzle 19 is hermetically sealed so that the air to be injected does not leak to the surroundings and the powder is scattered in the atmosphere to deteriorate the environment or enter the machine components to cause a failure. The structure is fitted in the stopper 22.

  By this action, the powder does not remain in the measuring grooves 15a, 15a, etc., and the precise amount is continuously discharged. Although this action is performed regardless of the physical properties of the powder, in particular, in the present invention, a powder having a relatively large particle size and having no moisture is suitable. And since it is forcibly excluded by the injection of air, no vibration is applied, a fixed amount is always ensured, and no variation occurs.

  The powder quantitative feeder according to the present invention is configured as described above. Therefore, although the object is powder, it is of course possible to use an inert gas such as nitrogen gas instead of air as the forced exhaust means when there is a risk of combustion. In this embodiment, the air nozzle 19 is used as a means for forcibly sending the powder remaining in the measuring grooves 15a, 15a... Into the discharge chute 18, but this is replaced with a suction nozzle. , 15a... Can also be sucked from the lower side. In this case, the penetration of the powder into the suction nozzle can be avoided by various means such as a filter.

DESCRIPTION OF SYMBOLS 1 Stand 2 Disc frame 3 Motor 4 Reduction gear 4a Shaft 5 Gear 6 Storage container (hopper)
DESCRIPTION OF SYMBOLS 7 Agitation shaft 8 Gear 9 Transmission gear 10 Agitation rod 11 Partition plate 12 Supply means 12a Blade body 12b Ring-shaped guide 13 Gear 14 Gear 15 Supply board 15a Measuring groove 16 Rotating shaft 17 Gear 18 Discharge chute 19 Air nozzle 20 Air pump 21 Hose ( tube)
22 Sealing stopper

Claims (2)

A drive unit having a powder container, a drive unit installed below the container, a main shaft protruding from the drive unit into the storage container, and an L-shaped round bar attached to the main shaft A stirring means, a supply means attached to the main shaft below the stirring means, a supply plate attached to a rotating shaft interlocked with the drive unit, and a powder measuring groove formed on the periphery at an appropriate pitch; A discharge chute formed below the outer end of the supply board, and comprises means for forcibly dropping the powder in the measurement groove of the supply board on the discharge chute on the discharge chute, The means for forcibly dropping is arranged above the position where the measuring groove of the supply board and the discharge chute overlap, the tip is directed to the discharge chute, and a plurality of hoses (tubes) are provided from the air pump or vacuum pump. Connected In the quantitative feeder device of the powder was air injected from which air nozzle, air nozzle 19 described above, air is injected out into the environment, or the powder is scattered in the atmosphere of deteriorating the environment, machinery components The powder metering feeder is characterized in that it is inserted into an airtight sealing plug 22 that seals between the injection port and the measuring groove so as not to cause a malfunction due to contamination. . The powder quantitative feeder according to claim 1, wherein an inert gas is used instead of air in the air nozzle .

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