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First of all, the sieve plate should have sufficient strength, high opening rate and not easy to block holes and other properties. When the vibrating screen vibrates, the sieve plate passes through materials of different shapes and sizes, and under the action of the vibration force, the materials of different particle sizes are separated to achieve the purpose of classification.

1. Slit sieve plate:

Made of stainless steel as screen bars, there are three types of structures: strip type, welded type and braided type. The cross-sectional shape of the sieve bars of the slotted sieve plate is circular, and the slotted sieve plate is suitable for dewatering, de-intermediation and desliming of medium and fine grades.

2. The bar sieve plate is composed of a group of parallelly arranged steel bars with a certain cross-sectional shape. The rods are arranged in parallel, and the interval between the rods is the size of the sieve. Rod screen surface is generally used for fixed screen or heavy-duty vibrating screen, suitable for screening coarse-grained materials with a particle size larger than 50mm.

3. Woven mesh screen:

The woven mesh screen is woven with metal wires pressed with buckles, and the shape of the screen holes is square or rectangle. Its advantages are: light weight and high opening rate; and in the screening process, because the wire has a certain elasticity, it vibrates at a high frequency to make the fine-grained material sticking to the wire fall off, thereby improving the screening efficiency. It is suitable for the screening of medium and fine-grained materials. But the disadvantage is the shorter lifespan.

4. Punching sieve plate

Punching sieve plate is generally made by punching round, square or rectangular sieve holes on a steel plate with a thickness of 5-12mm. Compared with sieve plates with round or square sieve holes, the sieve surface of rectangular sieve holes usually has a larger effective area, lighter weight and higher productivity, and is suitable for processing materials with higher moisture content, but the separation accuracy of screening is poor. .

5. Polyurethane sieve plate:

Polyurethane sieve plate is a mesh product produced with polyurethane as raw material. The pore shape of the sieve plate is divided into: slit, rectangle, circle, square, etc. It has good wear resistance, oil resistance, hydrolysis resistance, bacteria resistance, resistance to Aging performance, widely used in coal washing plants, coking plants, mines, power plants, dredging companies, metallurgy, petroleum, petrochemical and other industries.

The advantages of polyurethane sieve plate:

1. Good wear resistance: long service life, its wear resistance is 3-5 times that of steel sieve plates, and more than 5 times that of ordinary rubber sieve plates.

2. Reduce the maintenance rate: The polyurethane screen plate is not easy to be damaged and has a long service life, so it can greatly reduce the amount of maintenance and the loss of shutdown and maintenance.

3. Low total cost: Although the polyurethane screen of the same specification (area) has a higher one-time investment (about twice) than the stainless steel screen, the service life of the polyurethane screen is 3-5 times that of the stainless steel screen, and the maintenance and replacement The number of times is small, so it is the best choice for economical application.

4. Good moisture resistance: it can work under the condition of water as the cut-off, and in the case of water, oil and other media, the friction coefficient between polyurethane and materials is reduced, which is more conducive to sieving, improves sieve resolution, and avoids wet particles At the same time, due to the reduced friction coefficient, the wear is reduced and the service life is increased.

5. Corrosion resistance: non-flammable, non-toxic and tasteless.

6. Anti-clogging: Due to the reasonable design of the sieve hole and the unique manufacturing process of the sieve plate, the particles of the limit size will not block the sieve hole.

7. Good vibration absorption performance: strong silencing ability, which can reduce noise, and can make the objects on the screen not broken in the process of vibration.

8. The polyurethane sieve plate has a self-cleaning effect, so the screening efficiency is high.

9. Energy saving and consumption reduction, the proportion of polyurethane is small, and the weight is much lighter than that of the same size of the screen, thereby reducing the load of the screen machine, saving power consumption, and extending the life of the screen machine.