JPH0441333A - Circle feeder and manufacture thereof - Google Patents

Abstract

PURPOSE:To enable uniform and quantitative discharge from a material discharge opening by inclining the lower end of an adjusting cylinder upward in the turning direction of a spoke from the discharge opening, and forming the approximately entire periphery of the lower end into a spiral shape. CONSTITUTION:When a material 5 is supplied into an inner cylinder 1 and a shaft 6 is rotated in the direction of the arrow (a), a turning wheel 7 is rotated in the same direction through a spoke 3, and small scrapers 9 are rotated in the same direction along a baseplate 8 in a space (s). The material 5 delivered into the space (s) through a gap (t) adjusted by an adjusting cylinder 4 so as to form an angle of repose alpha is thereby rotated along the space (s) and discharged outboard from a discharge opening 2. At the whole periphery of the space (s), the gap (t) is gradually enlarged from the discharge opening 2 toward the arrow mark (a) and narrowed immediately after the discharge opening 2, that is, at a B-part, so that the delivery quantity of the material 5 is restricted, and a large quantity of delivery toward the space (s) is not generated. Also because of the gradual enlargement of the gap (t), the material 5 is delivered by the enlarged quantity, and the delivery quantity is not changed even right before the discharge opening 2.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a rotary metering feeder for powder or granules.

"Prior Art" Conventionally, in a circle feeder, a gap of the same height is provided between the bottom plate of the outer cylinder and the lower end of the inner cylinder, and the material in the inner cylinder passes through the gap into the material transport space between the inner and outer cylinders. The material was cut out naturally from the ground, rotated along the space with a small scraper, and continuously dropped from the outlet provided in the bottom plate to supply a fixed amount (Utility Model Publication No. 58-2379
No. 5).

However, the particle size of the material introduced or supplied into the inner cylinder,
Depending on the shape, fluidity, etc., the amount cut out from the gap to the space side changes immediately and just before falling from the discharge port. In other words, depending on the material, the amount of cutout is greater immediately after falling than immediately before falling (because the angle of repose is rapidly formed and stabilized,
A phenomenon occurred in which the material was cut out to the space side only from the gap immediately after falling, and not from the other circumferential portions.

Such a phenomenon goes against the uniform supply theory of first-in, first-out, in which the material in the inner cylinder is evenly cut out from the entire circumference of the gap, and depending on the material, an undesirable phenomenon of uneven descent within the inner cylinder occurs.

``Problems to be Solved by the Invention'' The present invention aims to lower the material in the inner cylinder evenly by cutting the material supplied into the inner cylinder uniformly from almost the entire circumference of the gap to the space side, thereby discharging the material. The purpose is to supply a constant amount of material from the outlet without unevenness.

"Means for Solving the Problems" In order to achieve the above object, the present invention includes an inner and outer cylinder provided concentrically on the machine frame, a material transport space interposed between these cylinders, and a bottom plate provided on the outer cylinder. is provided, with a material cutting gap interposed between the bottom plate and the lower end of the inner cylinder, and a cylinder for adjusting the gap is arranged along the outer periphery of the inner cylinder, and a cylinder is provided in the center of the bottom plate. A rotating shaft is provided with a rotating shaft via spokes, the rotating ring is arranged along the inner circumference of the outer cylinder, and a material transport space scraper is provided on the rotating shaft in the space along the bottom plate. In a powder/granule rotating feeder having a material discharge port, the lower end of the adjusting cylinder is inclined upward from the material discharge port in the rotational direction of the spokes, and almost the entire circumference of the lower end is formed in a spiral shape. The circle feeder according to the above invention, wherein the lower end of the inner cylinder is formed parallel to the lower end of the adjustment cylinder. It is constructed by the circle feeder manufacturing method.

"Operation" Therefore, when the material 5 is supplied into the inner cylinder 1 and the rotating shaft 6 is rotated in the direction of the arrow a, the rotating wheel 7 rotates in the same direction via the spokes 3, and moves upward along the bottom plate 8 of the space S. The Kiko scraper 9 rotates in the same direction, and the material 5 cut into the space S through the gap t adjusted by the adjustment cylinder 4 to form an angle of repose α is rotated along the space S. This is then discharged from the discharge port 2 to the outside of the machine. The gap t gradually expands around the entire circumference of the space S from the discharge port 2 in the direction of the arrow a, and narrows immediately after the discharge port 2 (section B in Figure 3), which limits the amount of material 5 to be cut out. Therefore, a large amount is not cut out toward the space S. Since the gap t is gradually enlarged, the material 5 is cut out by the enlarged amount, and the cutout amount does not change even just before the discharge port 2. Therefore, the material 5 in the inner cylinder 1 is moved from the center toward the gap t by the spokes 3, and further descends uniformly over the entire circumference.

The inclination angle B of the lower ends 1', 4' of the inner or adjusting cylinder 1.4 is appropriately determined from 0 degrees (FIG. 4) depending on the type of material 5.

Of course, the gap t can be adjusted by raising and lowering the adjusting cylinder 4.

"Example" The bottom plate 8 of the outer cylinder 11 is fixed to the machine frame 10, and the outer cylinder 1
1 and a concentric inner cylinder] are connected to each other via a flange]2, and a material transport space S is provided between the circles W11 and W11. A material cutting gap t is interposed between the bottom plate 8 and the lower end 1' of the inner cylinder l, and a cylinder 4 for adjusting the gap t is fitted on the outer periphery of the inner cylinder 1 so as to be adjustable up and down. The gap t can be adjusted by means of its lower end 4'. A rotating shaft 6 is provided in the center of the bottom plate 8, a rotating shaft 7 is provided on the shaft 6 via a material guide spoke 3.3, and the rotating shaft 7 is arranged along the inner circumference of the outer cylinder 11, A plurality of material transport space scrapers 9 are provided on the shaft 7 at regular intervals toward the center and along the bottom plate 8 in the space S, and a material discharge port 2 is opened in the space S to remove the powder. - A granule rotating feeder is formed. The lower end 1' of the inner cylinder 1 is inclined upward from the position of the material discharge port 2 (the position shown in FIG. 3A) in the direction of rotation of the spokes 3 (arrow a), thereby The lower end 1' is formed in a spiral shape over almost the entire circumference (a horizontal part 1'' may be formed at the discharge port 2), and the angle β of the inclination is determined by the particle size and shape of the material 5. Alternatively, it is determined appropriately depending on the fluidity, etc. That is, it is preferable that the material 5 with high fluidity is set at a large angle β, and the material 5 with low fluidity is set horizontally (0 degrees) with a small angle β. Flowability is a factor that depends on the particle size of the material and the nature or shape of the surface.The lower end 4' of the adjusting cylinder 4 is inclined parallel to the lower end 1' of the inner cylinder 1. In the figure, reference numeral 13 indicates a bolt for adjusting the elevation of the adjustment cylinder 4, reference numeral 14 indicates a speed reducer on the rotary shaft 6, reference numeral 15 indicates a driving motor, and reference numeral 16 indicates a material supply hopper connected to the upper end of the inner cylinder 1.

"Effects of the Invention" Since the present invention is configured as described above, the material fed into the inner cylinder 1 of the circle feeder is cut out in equal amounts to the space S side over almost the entire circumference of the gap t. As a result, the material 5 in the inner cylinder 1 can be processed evenly from the center to almost the entire circumference, so the material 5 cut into the space S has no unevenness and can be discharged uniformly and in a fixed amount from the discharge port 2. There are benefits to be gained.

Further, since the present invention is based on the above-described method, it is possible to easily obtain a circle feeder that can uniformly cut out material 5 from almost the entire circumference of the gap t depending on the type of material 5.

[Brief explanation of the drawing]

Fig. 1 is a side view showing the circle feeder of the present invention, Fig. 2 is a plan view taken along the line x-X of Fig. 1, and Fig. 3 is Fig. 2 A.
, Fig. 4 is a developed view of the inner cylinder as seen from directions B, C, and D. Fig. 4 is a developed view of the inner cylinder with the lower end having an inclination angle of 0 degrees.
The figure is a developed view of an adjustment cylinder having a lower end with an inclination angle of 0 degrees. 1...Inner cylinder, 1', 4'...Lower end, 2...Material discharge port, 3...Spoke, a...Rotation direction, 4...Adjustment cylinder, β...Inclination angle, 5...Material .

Claims (3)

[Claims] (1) An inner and an outer cylinder are provided concentrically on the machine frame, a material transport space is provided between these cylinders, a bottom plate is provided on the outer cylinder, and a material is transported between the bottom plate and the lower end of the inner cylinder. A cut-out gap is interposed therebetween, and a cylinder for adjusting the gap is disposed along the outer periphery of the inner cylinder, and a rotating ring is provided through spokes on a rotating shaft provided at the center of the bottom plate, and the rotating ring is is arranged along the inner periphery of an outer cylinder, a small scraper for transporting material is provided in the space along the bottom plate of the rotating ring, and a material discharge port is opened in the space. In the circle feeder, the lower end of the adjustment cylinder is inclined upward from the material discharge port in the direction of rotation of the spokes, and substantially the entire circumference of the lower end is formed in a spiral shape. (2) The circle feeder according to claim (1), wherein the lower end of the inner cylinder is formed parallel to the lower end of the adjustment cylinder. (3) The method for manufacturing a circle feeder according to claim (1) or (2), wherein the angle of the inclination is appropriately determined from 0 degrees depending on the material.