Why the polyurethane screen has a long life
Writer： admin Time：2020-07-28 16:48 Browse：℃
Why is polyurethane sieve plate longer life than ordinary sieve plate? Many friends have some questions about this. Today, the polyurethane screen manufacturer will give you a brief introduction:
1. TIG welding can form a molten pool of more than 1000 degrees, so its bonding force is metallurgical bonding, and polyurethane sieve plate resistance welding does not form a molten pool, and its bonding force is adhesive bonding. In argon arc welding, there is constant argon gas transportation during welding, so that the solder joints cannot be in contact with oxygen in the air, which effectively prevents the oxidation of the welding material, while resistance welding has no protective measures, and a layer will be formed between the welding points of the screen bar and the support bar The oxide film affects the welding effect and the welding is not firm.
3. Resistance welding uses water cooling in the welding process. The solder joints are suddenly cooled, and the welded parts of the sun bar will become hard, brittle and brittle, which greatly reduces the service life; the solder joints of argon arc welding are naturally cooled and will not Hard and brittle.
4. Argon arc welding is flat plate welding. The surface of the sieve plate is as flat as a mirror without undulating protrusions, and the wear is uniform during use. However, due to the limitation of the resistance welding process, the sieve plate is uneven and has wavy protrusions, which becomes a weak link. It is easily worn by the medium during use.
What is the detailed classification of polyurethane screen
One, according to the manufacturing process, it is divided into: straight slotted screen and punched screen.
Second, the straight slit screen is divided into: all stainless steel screen, polyurethane edge screen and all polyurethane screen.
3, the perforated sieve plate is divided into: stainless steel perforated sieve plate, manganese steel perforated sieve plate and iron plate perforated sieve plate.
Four, the straight-line slotted sieve plate is a rectangular hole with a narrow top and wide bottom.
5, the punching sieve plate has round holes, square holes, and special-shaped holes, and the cross section is the same up and down.
Polyurethane screen product features
1. Polyurethane screen has good wear resistance and long service life. Its wear resistance is 3 to 5 times that of steel screens and 5 times that of general vulcanized rubber screens.
2. The amount of maintenance is small, the polyurethane screen is not easy to be destroyed, and the service life is long, so it can greatly reduce the amount of maintenance and shutdown damage.
3. The total low cost. Although the polyurethane screen of the same specification (total area) has a higher investment (about 2 times) than the one-time project of stainless steel screen, because the service life of the polyurethane screen is 3 to 5 times that of the stainless steel screen, In addition, the frequency of maintenance and replacement is low, so the fixed cost is not high, and the economic development is also very cost-effective.
4. Polyurethane screen has good moisture resistance. It can work under the standard of water as a substance, and under the condition of water, oil and other substances, the friction resistance between the polyurethane material and the raw material is reduced, which is more conducive to screen penetration and improves screening. Efficiency, and can prevent the adhesion of wet and cold particles. In addition, due to the reduced friction index, the damage is reduced and the service life is improved.
5. Anti-corrosion, non-flammable, non-toxic and odorless.
6. ??Because the design of the round hole sieve is effective, the production and processing technology of the grate board is unique, and the particles of extreme specifications are not easy to block the round hole sieve.
7. Good vibration absorption characteristics, strong noise-cancellation ability, can reduce noise, and make the screen material not fragile during the whole process of vibration.
8. Because of the secondary vibration characteristics of the polyurethane material, the polyurethane screen has a self-cleaning effect, so the screening efficiency is high.
9. Energy saving and emission reduction. The proportion of polyurethane material is small, which is much lighter than the steel screen of the same size, which reduces the load of the screener, saves energy consumption and prolongs the service life of the screener.
