JPH0532190Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Field of Application) The present invention relates to a quantitative supply device for sand-like objects that can stably supply sand-like objects at a desired supply amount.

(Prior Art) A rotary feeder that supplies a fixed amount of granular objects has a structure in which blades of a rotating body are arranged in a radial direction, and the granular objects get caught between the blades and the casing. As a conventional technique for preventing this, there is a technique as shown in Japanese Utility Model Application Publication No. 60-168544, in which a flexible blade body is provided with a receding angle to prevent the supplied object from being crushed. However, in this conventional technology, the shape of the container that stores the object to be supplied is complicated, so the metering is not uniform, and when the object is discharged, the object remains in the space without being discharged, resulting in variations in the amount of supply. There is a problem that occurs. In other words, if the powder particles in the form of sand-like objects have a high hardness such as SiC, they will not flow into the clearance areas of the equipment components.
SiC powder, etc. enters, making the equipment extremely unstable and causing noticeable galling and wear of component parts.

(Problems to be solved by the invention) The invention enables uniform weighing of granular objects, which is a problem with conventional rotary feeders, and prevents granular objects from being caught between the rotating blade and the casing. The purpose is to reliably discharge granular objects when discharging granular objects and to reduce variations in supply amount. In particular, the purpose of the present invention is to easily set a desired supply amount of highly hard sand-like objects such as SiC powder in a desired atmosphere (inert gas, pressurized atmosphere, etc.) (particularly when supplying a very small amount). )
It is an object of the present invention to provide a compact and inexpensive quantitative supply device for sand-like substances.

(Means for Solving the Invention) In order to achieve the above object, the quantitative supply device for sand-like objects of the present invention includes a casing having a supply hole for supplying the sand-like objects and a discharge hole for discharging the sand-like objects. A flocking member is rotatably disposed within the casing and is elastically deformable in sliding contact with the inner wall of the casing around the rotation axis, and a flocking member having a width with a facing gap between the flocking members. It has a recess with a constant area and a depth corresponding to the length of the recess, and when it communicates with the supply hole, the sand-like object supplied into the recess is stored in a fixed amount, and the sand-like object in the recess is conveyed by rotation. The structure includes a rotating part that discharges objects into the discharge hole by its own weight, and a driving part that rotationally drives the rotating part.

(Function/Effect) The quantitative supply device for sand-like objects of the present invention having the above configuration is particularly effective for supplying minute quantities, and the recess for storing the sand-like objects is in sliding contact with the inner wall of the casing, and is located between elastically deformable flocked members. This makes it easy to store and discharge sand-like objects. Furthermore, when a sand-like object is measured and stored from the supply hole into the recess of the measuring member, if the sand-like object tries to be caught between the recess and the casing, the flocking member is elastically deformed. By expanding and changing the volume of the recessed portion, it is possible to efficiently and accurately store the amount of the sand-like object to be bitten, and to transport the sand-like object stably and smoothly while preventing the sand-like object from being bitten. Moreover, when the sand-like object is discharged from the recess, the sand-like object can be positively and reliably continuously discharged by the restoring force of the flocking member that is in sliding contact with the inner wall of the casing and is elastically deformable.

The device of the present invention achieves the above-mentioned effects, so it enables uniform metering, prevents sand-like objects from getting caught, and reliably discharges sand-like objects when discharging sand-like objects, thereby adjusting the supply amount. Variations can be reduced.

(Embodiment) An embodiment of the present invention will be described with reference to FIGS. 1 and 2.

In this example, it has been difficult to supply small amounts in the past.
This is a quantitative supply device for sand-like objects that continuously supplies high-hardness sand-like objects such as SiC with good quantitative accuracy in any atmosphere.

As shown in FIGS. 1 and 2, the funnel-shaped hopper 1 at the top of the device of this embodiment
The hopper 1 is filled with silicon carbide powder 3, which is a quantitatively supplied material. The average size of the powder is about 500 μm.

The hollow cylindrical casing 2 is fixed to an installation stand with screws. Said casing 2
, a supply nozzle N for supplying the powder or granular material to the upper part is provided.
A supply hole 4 with a diameter d of 6 mm is provided in the hopper 1.
The silicon carbide powder 3 is supplied to the lower part, and the lower part is provided with a discharge hole 5 for discharging the particles, and the discharge hole 5 communicates with a supply passage 6 communicating with a pressurized atmosphere (not shown). are doing. Both end surfaces of the casing 2 are fixed via gaskets 7, 8 to side plates 9, 10 forming the casing by a plurality of bolt means. In addition, bearings 11 and 12 are located in the central recesses of the side plates 9 and 10.
is fitted. The rotation shaft 13 is the bearing 1
1 and 12, and protrudes from a through hole in the center of the side plate 10, and a pulley 13' is fixed to this protruding end with a bolt (not shown). has been done.
An O-ring 14 is provided around the rotating shaft 13 and an opening in the center of the side plate 10 .
The rotating part 15 is inserted into one end of the rotating shaft 13 and fixed by a screw 16, and the outer diameter of the rotating part 15 is smaller than the inner diameter of the casing 2.
The rotating part 15 and the supply hole 4 are in sliding contact with each other and are provided with zero clearance to prevent particles from being caught between them.

That is, in the rotating part 15, a flocking member 17 such as rasher cloth, bedding, etc., which is elastically deformable and is in sliding contact with the supply hole 4 of the supply nozzle N serving as the inner wall of the casing, is arranged in an annular manner around the rotation shaft 13. The flocked member 1
7, an annular recess 18 having a width t of 3 mm and a depth 3 mm is formed around the rotating shaft and opening toward the outer circumference.

The recess 18 has a volume suitable for the amount of powder to be metered and supplied.

The electric motor M is installed on an installation stand, and a pulley 19 is fixed to its output shaft. The pulley 19 and a pulley 13' fixed to the rotating shaft 13
are configured to be interlocked with each other by a V-belt 20, so that the rotating part 15 fixed to the rotating shaft 13 is rotationally driven by the electric motor M. The rotational speed of the rotating part 15 is determined by the required supply amount, but in this embodiment it is about 3 to 56 rpm, so the supply amount of silicon carbide powder is about 0.5 to 5 ml/min.

In the apparatus of this embodiment having the above-mentioned configuration, when storing the granular material from the supply hole 4 into the recess 18, the granular material is stored in the recess 18 as an annular groove that slides into the supply hole 4. Weigh uniformly without any variation. Then, the powder and granular material stored in the recess 18 is rotationally conveyed by the rotating part 15 which is driven and rotated by the electric motor M.

When the recess 18 rotates and reaches the position of the discharge hole 5, the powder is discharged from the recess 18.
8 has a concave cross section and is in an open state, so that the powder 3 can be easily discharged.

As described above, in the embodiment, the sand-like objects are stored and weighed uniformly in the recess 18 of the annular groove, the supply amount of the sand-like objects is stabilized, jamming is prevented, and the crushing of the sand-like objects is prevented. It is possible to prevent this and ensure smooth operation of the machine, and also to ensure that the sand-like objects are discharged when discharging the sand-like objects, thereby reducing variations in the amount of supply.

In order to reduce the amount of sandy material supplied, the diameter d of the supply hole 4 of the supply nozzle N in the hopper 1 may be made small.
In this case, there is a limit to reducing the aperture due to the bridging phenomenon of sand-like objects. For this reason, the recess 18
This can be realized by reducing the width t of .
In addition, the supply amount of the sand-like object can be changed by using the diameter d of the supply hole 4.
When t is constant, the width t of the recess 18 is 1 to 6 mm.
Further, the depth of the recess is preferably 2 to 3 mm, and can be realized by changing the rotation speed of the electric motor M.

In addition, in one embodiment of the present invention, one recess is arranged in an annular shape, but it is also possible to increase the number and size of the recesses as the amount of sand-like material supplied increases. It can also be placed in Further, the cross-sectional shape of the recess is not limited to a concave shape, but may be an arcuate shape, a triangular shape, or the like.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view of one embodiment of the present invention, and FIG. 2 is a cross-sectional view of one embodiment of the present invention. 1... Hopper, 2... Casing, N... Supply nozzle, 4... Supply hole, 5... Discharge hole, 13...
...Rotating shaft, 15... Rotating part, 17... Flocking member,
18...Concavity.

Claims (1)

[Scope of Claim for Utility Model Registration] A casing having a supply hole for supplying a sand-like object and a discharge hole for discharging the sand-like object, and a casing rotatably disposed within the casing and slidingly in contact with the inner wall of the casing around a rotation axis. Elastically deformable flocking members are disposed, and a recess of a constant area is provided between the flocking members with a width separated by a facing gap and a depth corresponding to the length of the flocking members, and the supplying A quantity of sand-like object is stored in the recess when communicating with the hole,
and a rotating part that rotatably transports and discharges the sand-like object in the recess into the discharge hole by its own weight, and a drive part that rotationally drives the rotating part, and the sand-like object stably supplies the weighed sand-like object. Quantitative feeding device.