JP4221010B2 - Screening method and separation method using screen - Google Patents

Description

  The present invention relates to a sieving mesh and a sieving method using a sieving mesh for efficiently separating raw material grains such as feed in which a plurality of different kinds are mixed and the mixture and separating and removing foreign matters.

Conventionally, in order to sort raw materials such as feed mixed with multiple different kinds of materials, and to separate and remove foreign substances, a sieve mesh knitted by crossing steel wires, and a number of through holes in a flat plate are drilled as a mesh It is generally well known to use a sieve screen.
Moreover, as a sieve mesh used for selecting raw materials such as grains, a sieve mesh is formed by forming a plurality of through holes in a flat plate having a predetermined shape as a mesh, and the hole surface of the through hole is predetermined with respect to the plate surface of the flat plate. A sieve mesh characterized by providing an inclined surface inclined at an angle is disclosed and well known. (For example, see Patent Document 1)

Japanese Utility Model Publication No. 6-63176

  However, the separation by the sieve mesh knitted by crossing the steel wires or the sieve mesh having a large number of through-holes formed in a flat plate as a mesh, fractionation of raw material grains such as feed mixed with a plurality of different kinds of materials and mixtures There is a problem that it is not possible to separate and remove the mixed foreign matters efficiently. The reason for this is that, for example, raw material grains such as livestock feed and mixtures are mixed with stalks of grains, and the stems have a round bar shape. This is because the stalks enter the mesh in the vertical state and do not enter the mesh in the horizontal state, and thus cannot be efficiently screened.

  In addition, the technique described in Patent Document 1 provides means for reducing the clogging of the mesh and enabling quick selection in order to arrange the same raw material grains. There are problems such as being unsuitable for separation of a plurality of mixed raw material grains, mixture, and mixed foreign substances.

In view of the above problems, the present inventor has been able to efficiently separate and remove raw material grains and mixtures such as livestock feeds and the like mixed with a plurality of different kinds of substances and the mixed foreign substances as a result of diligent test research. We have succeeded in developing a sieve screen and a separation method using a sieve screen, and means for solving the problem are as described below.
That is,
(1) a large number of through-holes on a flat plate that is formed in the entire surface, will have a plurality of openings is disposed, the opening is formed the flat plate is being Tsukinuka the slanted A sieve screen characterized by having a plate surface protruding in an inclined manner from the edge of the opening to the upper surface.
(2) The sieve mesh according to item (1) above, wherein the plurality of openings formed in the flat plate are arranged so that the positions of the openings are staggered.
(3) preceding the inclination angle of the apertures edge plate surface projecting inclined from the upper surface of, characterized in that formed by the angle set to be fractionated attrition by raw material grains in the thickness to be fractionated ( The sieve mesh according to any one of 1) and (2).
(4) Supplying a raw material in which flat or ball-like different raw materials are mixed to the sieve mesh described in any one of (1) to (3) above, and drilling the flat plate The sieving system is characterized by sieving and separating the different raw material mixture in which the different raw materials are mixed through the plurality of through holes and the plurality of openings.

Then, a through hole formed in the flat plate, the flat plate are formed by Tsukinuka the inclined, has a plate surface projecting slanted from the edge of the opening to the upper surface The flat and small raw material grains and the mixture are sieved from the opening and the foreign matter is inclined to the outer diameter of the through hole and the upper surface of the opening so as not to be sieved from the through hole or the opening. The inclination angle of the plate surface protruding in a shape is set so that the flat raw material grains are sieved out from the opening due to its thickness.

Sieve screen of the present invention as described in the above means, a large number of through-holes on a flat plate that is formed in the entire surface, a plurality of openings is disposed, the opening the flat plate is A feed which is formed by being protruded in an inclined shape and has a plate surface protruding in an inclined shape from the edge of the opening to the upper surface, and a plurality of different kinds of food mixed by using the sieve mesh Etc. and separation / removal of mixed foreign matters can be performed efficiently. In particular, raw materials and mixtures of livestock feed, etc., mainly made from corn, are mixed with flat or ball-shaped foreign matter at the time of drying or processing, and round bar-like foreign matter such as stems, and the foreign matter is separated. Although a great deal of time is required for removal, the present invention can be carried out efficiently in a short time.

  The raw material particles and mixture to be introduced and the mixed foreign matter fall in the vertical direction and hit the sieve mesh, but after hitting on the sieve mesh, the center of gravity is directed to a lower direction, and the flat raw material particles have a floor area. Since it is sieved while moving in contact with the screen surface on the wide surface, it is suitable for sorting by the thickness of the raw material grains and also prevents clogging.

  The best mode for carrying out the present invention will be described with reference to the drawings showing embodiments. FIG. 1 is a perspective view showing an embodiment of a sieve screen according to the present invention, and FIG. 2 is a cross-sectional view taken along line AA of FIG.

As shown in FIG. 1 and FIG. 2, the sieve mesh 1 according to the present invention is projected into a flat plate 2 having a large number of through holes 1a, 1a,. Openings 3, 3,... Having plate surfaces protruding in an inclined manner from the edge to the upper surface are disposed on the upper surface of the plate 2.

  The plate 2 is a plate-shaped steel plate having a thickness of about 2 to 3 mm, in which a large number of through holes 1a, 1a,... Are alternately drilled. The raw material grains and the mixture are sieved, and foreign particles such as the original raw material grains and stems do not pass through the pores so that they are not sieved off. The hole diameter of the through hole 1a is determined by the size of the raw material grains, the mixture, the foreign matter, and the like.

A plurality of openings 3, 3,... Having a plate surface protruding in an inclined shape and protruding in an inclined manner from the edge to the upper surface are formed in the plate 2 in the same direction at a constant interval, The positions of the openings 3, 3,... Are arranged adjacent to each other so as to be staggered. That is, by staggering so that the lower opening 3 is positioned between the horizontal intervals of the openings 3, 3,... As shown in the drawing, the raw material grains and the mixture moving through the horizontal interval and The mixed foreign matter is efficiently captured.

In addition, the opening portions 3, 3,... Are set with the inclination angles 3a,... Of the plate surfaces protruding in an inclined manner from the edge of the opening to the upper surface so as to be sieved by the thickness of the raw material grains. By passing the opening through the thickness, it can be sieved even if it is wide, and a rod-like foreign material such as a stem can be prevented from passing through the opening and prevented from being sieved off. The raw material grains and mixture to be introduced and the mixed foreign matter fall in the vertical direction and hit the sieve mesh, but after hitting on the sieve mesh, the center of gravity is directed to a lower direction, and the flat raw material grains are wide. Since sieving is carried out while moving in contact with the screen surface, it is preferable to sort by the thickness of the raw material grains, and clogging is prevented.

  It should be noted that the lengths of the openings 3, 3,...

Next, an example of sieving with the sieve mesh as described above will be described with reference to FIG. FIG. 3A shows a flat plate 2 that is formed by being protruded in an inclined shape, and has openings 3, 3, each having a plate surface protruding in an inclined manner from the edge of the opening to the upper surface. FIG. 3B shows an example of sieving by the sieve mesh 1 in which the openings 3, 3,... Are projected from the lower surface of the flat plate 2. This is an example.

The material to be sieved is corn dried raw material grains 4,..., Small granular mixture 5,... Crushed by processing, and round bar-shaped foreign matter 6, such as mixed stems.
In addition, this is an example for sieving and removing foreign matter such as raw material grains such as livestock feed mainly composed of corn and stems mixed in the mixture, and is not limited thereto.

  The sieve mesh 1 is configured such that the raw material grains 4,..., The mixture 5,..., Foreign matter 6,. So that it can be sieved.

  The raw material grains 4,... Pass through the opening 3 in the thickness direction of the corn which has become substantially flat due to drying or the like, and the small granular mixture 5,. Are blocked by the opening 3 and are not sieved off, but are sieved while being moved by the oscillation of the sieve mesh 1. The substantially flat raw material grains 4,... Move toward the lower center of gravity on the sieve screen while moving in contact with a wide surface, and therefore enter the opening 3 from the thickness direction. Accordingly, even raw material grains having a flat width can be sieved off.

FIG. 4 shows an example in which the sieve mesh 1 according to the present invention is swung by a motor 7, an inlet hopper 8 is provided at the upper side, and collection receptacles 9, 10 are provided for collecting items sorted and sorted at the lower side. is there. The sieve screen 1 is disposed with the openings 3, 3,... Projecting from the upper surface of the plate 2, and is provided with a slight downward gradient so as to swing and move an object to be sorted and sorted.
The openings 3, 3,... May be arranged so as to protrude from the lower surface of the plate 2 as shown in FIG.

The raw material grains 4,..., The mixture 5,..., The foreign matter 6,... Put into the inlet hopper 8 fall in the vertical direction (arrow opening) and hit the sieve mesh, but after hitting the sieve mesh Is oriented in a direction with a low center of gravity, and the flat raw material grains 4, 4,... Pass through the openings 3, 3,. At the same time, the small granular mixture 5,... Is sieved through the through holes 1a, 1a,... And the openings 3, 3,. Instead, it is collected in the collection receptacle 10 from the final end and separated.
In addition, this is an example for explaining the sieving mesh and the sorting method using the sieving mesh according to the present invention in an easy-to-understand manner, and is not necessarily limited thereto, and the mounting configuration is changed according to various usage modes.

It is a perspective view which shows the Example of the sieve net based on this invention. It is AA sectional drawing of FIG. It is principal part sectional drawing which shows the example of sieving. It is explanatory drawing which shows an example of sieving classification.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Sieve net 1a Through-hole 2 Plate 3 Opening 3a Inclination angle 4 Raw material grain 5 Mixture 6 Foreign material 7 Motor 8 Hopper 9,10 Collection receptacle

Claims (4)

A large number of through-holes on a flat plate that is formed in the entire surface, will have a plurality of openings is disposed, the opening is formed the flat plate is being Tsukinuka the slanted, the opening A sieve mesh characterized by having a plate surface that protrudes in an inclined manner from the edge to the upper surface. 2. The sieve mesh according to claim 1, wherein positions of a plurality of openings formed in the flat plate are alternately arranged. Inclination angle of the apertures plate surface projecting inclined to the top surface from the edge of claim 1 or 2, characterized in that formed by the angle set to be fractionated attrition by raw material grains in the thickness to be fractionated The sieve mesh according to any one of the above. A plurality of through-holes formed in the flat plate by supplying a raw material in which a flat or ball-like different raw material is mixed to the sieve mesh according to any one of claims 1 to 3. And a sieving method using a sieving mesh, wherein the different raw material mixture in which the different raw materials are mixed is sieved and separated through the plurality of openings.

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