JPS6327820Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a screen for sieving lumps such as iron ore, crushed stone, coke, etc. into a predetermined particle size.

[Conventional technology]

Screens used in vibrating sieves include metal screens such as punched metal screens made of steel plates with circular, oval, or rectangular holes in various arrangements, and net screens made of steel wires with various cross sections. There's a screen.

In addition, square or rectangular holes are regularly punched in the rubber belt, and steel cords are placed at regular intervals.
A mesh called a rubber screen, which has strength and tension, is used.

[Problem that the invention attempts to solve]

The above-mentioned metal screen has the disadvantage that materials such as iron ore tend to get stuck in the mesh, which causes clogging and reduces sieving efficiency, and also generates noise during operation.

Rubber screens are effective in eliminating clogging due to their flexibility, but they are too flexible and may cause material to fly off the screen, colliding with surrounding walls and causing damage. In addition, the mesh may expand or be damaged, resulting in problems such as particles of the sieved material not being aligned. Furthermore, in order to maintain the tensile strength of the screen above a certain level, the thickness of the rubber sheet must be considerably increased, resulting in considerable weight and high cost. Furthermore, when it is desired to obtain a rubber screen with a large area, it is not possible to join multiple rubber sheets together due to strength reasons, which limits the size. In addition, with a screen made of rubber material, it is necessary to attach a hook to the end of the screen so that it can be attached to the iron mounting plate of the vibrator. It is necessary to perform fixing work such as clamping the ends of the screen 11 and tightening them from above and below with bolts 14, which poses a problem in that troublesome work is required.

In order to increase the strength of the rubber screen, there is one in which hard rubber is bonded to the bottom and soft rubber is bonded to the top, but this also does not solve the problem of weight and damage.

Furthermore, there are two manufacturing methods for this rubber screen: one is to make a mold and then cast, and the other is to punch a rubber plate with a double structure of hard rubber and soft rubber. The casting method required molds for each size to make rubber screens of a wide variety of sizes, resulting in high costs, and although it was suitable for mass production, it was unsuitable for low-volume, high-mix production.

To punch a double-layered rubber plate, it is necessary to order a single rubber plate that matches the size of the screen, or to cut it from a wider rubber plate. However, there was a drawback that there was a lot of loss and the cost of materials was high.

The present invention aims to eliminate the drawbacks of such conventional metal or rubber screens and provide a screen that has the advantages of both.

[Means for solving problems]

To achieve this purpose, the vibrating screen of the present invention has an upper screen made of a soft rubber material with excellent wear resistance, a lower screen made of a hard rubber material with excellent impact resistance, and a wire mesh or Another feature is that it has a three-layer structure with an intermediate screen made of an iron plate having predetermined punched holes.

〔Example〕

Hereinafter, the present invention will be specifically explained based on embodiments shown in the drawings.

FIG. 1 is a partially cutaway perspective view of the screen of the present invention, and FIG. 2 is a longitudinal sectional front view thereof.

In these figures, the upper screen 1 is made of a soft rubber material with excellent wear resistance, and the lower screen 2 is made of a hard rubber material with excellent impact resistance. The intermediate screen 3 located in between can be made of punched metal, or can also be made of wire mesh. Each screen is firmly joined by adhesive.

These upper, middle, and lower screens each have openings for sieving, and the openings have the same pitch and shape.

The upper screen 1 and the lower screen 2 are rubber plates of a certain area, for example, 500 to 800 square squares, with holes drilled in them, and these rubber plates can be replaced with iron plates or wire meshes that have also been drilled with prescribed holes. It is manufactured by sandwiching and welding the intermediate screen 3 from above and below.

In addition, upper screen 1, lower screen 2
does not need to be a single piece having the area of the entire surface of the screen, and can be manufactured by welding a plurality of veneers having a predetermined width to the intermediate screen 3.

In the figure, reference numeral 4 denotes a hook formed by bending the end of the metal intermediate screen 3, and the hook 4 is hooked onto and fixed to the diaphragm of the vibrator.

[Effect of idea]

As described above, the present invention provides the following effects.

Since the core is made of wire mesh or iron plate, the screen does not stretch during use, making tension adjustment easier and extending its life.

The flapping of the screen during vibration is reduced, and the wear of the screen presser washer is reduced, making it easier to fix.

Since the screens have little flapping, it is not necessary to make the upper and lower rubber screens thicker than necessary, and the weight can be reduced.

After punching holes in the rubber sheet or iron plate,
Since it can be welded, it is suitable for manufacturing a wide variety of products in small quantities, and since it does not require large hole punching presses, cutting dies, large rubber plate manufacturing equipment, or molds, it is inexpensive and allows for case-by-case design.

The rubber sheet does not necessarily have to be one piece with a large area, but it can be made up of two or three rubber plates of a specified size.
It can also be used by joining sheets together, reducing the cost of rubber plates.

Since there are no sharp bends, there is less localized wear and damage caused by the steel of the support.

The splashing of ore is reduced, and noise caused by damage to walls and collisions can be eliminated.

Both rubber and metal screens can be used without changing the screen support.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway perspective view showing the structure of an embodiment of the screen according to the present invention, FIG. 2 is a longitudinal sectional front view thereof, and FIG. 3 is a sectional view of the main part of a conventional rubber screen. 1: Upper screen, 2: Lower screen,
3: Intermediate screen, 4: Hook.

Claims (1)

[Scope of utility model registration request] Three layers: an upper screen made of soft rubber material with excellent wear resistance, a lower screen made of hard rubber material with excellent impact resistance, and an intermediate screen made of wire mesh or iron plate with predetermined punched holes. A vibrating screen with a unique structure.