Introduction to polyurethane screen plate
Polyurethane screen plate is a mesh product produced with polyurethane as raw material. The hole shapes of the sieve plate are slits, rectangles, circles, and squares. The main application industries are coal washing plants, coking plants, mines, power plants, dredging companies, metallurgy, petroleum, petrochemical and other enterprises. The main application equipment is the vibrating screen.

Features of polyurethane screen plate
1. It has good wear resistance and long service life. Its wear resistance is 3 to 5 times that of steel screen plates and more than 5 times that of ordinary rubber screen plates.

2. The maintenance workload is small, the polyurethane screen plate is not easily damaged and has a long service life, so the maintenance workload and loss of production shutdown can be greatly reduced.

3. The total cost is low. Although the one-time investment of polyurethane screen plates of the same specification (area) is higher (about 2 times) than that of stainless steel screen plates, the service life of polyurethane screen plates is 3 to 5 times that of stainless steel screen plates, and maintenance and replacement are The number of times is small, so the total cost is not high and it is economically very cost-effective.

4. It has good moisture resistance and can work with water as the medium. In the case of water, oil and other media, the friction coefficient between polyurethane and materials is reduced, which is more conducive to screen penetration, improves screening efficiency, and can avoid wet particles. At the same time, due to the reduced friction coefficient, the wear is reduced and the service life is improved.

5. Corrosion-resistant, non-flammable, non-toxic and tasteless.

6. Due to the reasonable design of the sieve holes and the unique manufacturing process of the sieve plate, particles of extreme size will not block the sieve holes.

7. It has good vibration absorption performance and strong silencing ability, which can reduce noise and make the objects on the screen less likely to break during vibration.

8. Due to the characteristics of secondary vibration of polyurethane, the polyurethane screen plate has a self-cleaning effect, so the screening efficiency is high.

9. Save energy and reduce consumption. Polyurethane has a small specific gravity and is much lighter than a steel screen of the same size, thus reducing the load on the screen machine, saving power consumption, and extending the life of the screen machine.

Polyurethane screen plate structure
1. Screen mesh:

Skeleton screen plate, strip hole screen plate, tensioning screen plate, slit screen plate, square hole screen, large hole screen, small hole screen, polyurethane rope woven screen, slit screen.

2. Board:

Traffic warning boards, stamping-resistant boards, scrapers, wear-resistant boards, rubber-coated boards, automobile linings, mechanical pads, wear-resistant scrapers, sandblasting machine guards, road roller scrapers, wear-resistant sheets.

3. Accessories:

Mud pump piston, impeller, vehicle bushing, sheath, buffer block, slide wheel, steel cable casing, printing ink barrier, polyurethane rod, polyurethane spring, polyurethane pad, polyurethane mold, rubber roller, sweeper wheel , polyurethane wheels, polyurethane rubber, plum blossom pads, polyurethane ropes, seals, rollers, mixing scrapers, cyclones.

Polyurethane screen plate uses
Washing and screening of materials in metallurgy (iron ore, limestone, fluorite, cooled blast furnace slag, coke and other raw materials), non-ferrous metals, yellow, coal, chemicals, building materials and hydropower projects, abrasive waste treatment, quarries and other industries. Grading and other industries. New structure model screen plates with various format specifications and screen hole sizes are especially suitable for occasions with strong impact, high hardness and high wear resistance. Wear-resistant screen plates are used for fine crushing and screening of iron ore, raw coal classification, gold, building materials, and screening of sand and gravel in hydropower and nuclear power projects.

Which is better, polyurethane screen plate or rubber screen plate?
Generally speaking, the wear resistance of polyurethane is 10 times that of rubber and 3 to 4 times that of steel. But why doesn’t polyurethane make high-speed car tires? Because ordinary polyurethane has hysteresis heat, which can cause molecular chain breakage after accumulation, which is its fatal flaw and a global problem. In addition, the strength and tearing of ordinary polyurethane are very good at normal temperature, but under the use conditions of 80 degrees, the strength drops to 50% of normal temperature and 20% at 100 degrees, and the tearing also becomes very poor and easy to break. .

In the same way, using ordinary polyurethane to make sieve plates is not necessarily better than rubber. I have been engaged in polyurethane elastomer research for more than 20 years after graduating from college. As far as I know, there are many companies in China that make polyurethane sieve plates, and there should be no one. can solve this problem.

In view of the hysteresis heat problem of polyurethane, ordinary small polyurethane wheels cannot survive for 1 minute at 10 kilograms of force and 3000 revolutions per minute, leaving only a layer of skin.

The conditions for making sieve plates, sand pump impellers and other products are much lower. It is unrealistic to use 10 times the rubber, but several times should be fine.