CPU has a wide range of hardness, high strength and elongation, excellent wear resistance, excellent comprehensive performance, and is widely used in the following aspects.
1. In terms of mines:
(1) Mining sieve plate and screen mesh: Screening equipment is an important equipment in mining, metallurgy, coal, building materials and other industries. Its key component is the sieve plate that separates solid particles of different sizes. The CPU sieve plate is used to replace the traditional The high-quality steel sieve plate can greatly reduce the weight and energy consumption, and it is easy to mold the sieve holes with reasonable cross-sectional structure and elasticity, which overcomes the problem of reduced screening efficiency caused by material stuck holes. And it can reduce the noise, so that the service life is greatly improved.
(2) Lining of mineral processing equipment: There are many mineral processing equipment for mining, which are the most prone to wear and tear. After adopting CPU lining, the service life can be increased by 3 to 10 times, and the total cost is greatly reduced.
(3) Ball mill lining: Using CPU as cylinder lining not only saves steel, reduces weight, but also saves power and energy consumption, and the service life can be increased by 2 to 5 times.
(4) The hoist friction pad is equipped with a high friction coefficient and high wear-resistant CPU instead of engineering parts, which can greatly improve the hoisting performance and service life.
2. In terms of industry:
(1) Rubber roller:
①Metallurgical rubber rollers: Due to cost considerations, CPU rubber rollers are mainly used in occasions with harsh working conditions and high quality requirements, such as pinch rollers, tension rollers, pressing rollers, conveying rollers, guide rollers, cutting board rollers, support rollers, etc. Rolls and sheet color coated rubber rolls, etc., such as cold rolled rolls are hard rubber rolls, hardness: Shore A90±5, tensile strength> 40MPa, elongation> 400%, Akron abrasion < 0.08cm3/1.61KM, and steel The peeling strength of the shaft core is >500KN/m, the size of the tension rubber roller is large φ1.5~1.7m, the length is 1.7~2m, and the glue thickness is 20mm. It requires high strength, small compression deformation and high wear resistance. Thin plate color coating rubber roller: used to coat stainless steel plate color paint, in addition to wear resistance, it is also required to be resistant to paint corrosion, with good resilience, so that the color printing is uniform and beautiful. (The hardness is usually Shao A40~60)
②Printing rubber rollers: divided into lead printing rubber rollers (Shao A20~30), offset printing rubber rollers (Shao A38~45) and high-speed printing rubber rollers, etc., because the CPU has low hardness, high strength, elasticity, wear resistance, and ink resistance. , very suitable for high-speed printing rubber roller with low hardness.
③Deaf Valley Rubber Roller: Using CPU instead of ordinary rubber roller can increase the service life by 3~4 times without polluting food.
④ Paper-making rubber rollers: Used as extrusion rubber rollers and pulping rubber rollers, the production efficiency can be increased by more than 1 times, and energy consumption and cost can be reduced.
⑤ Textile rubber rollers: used as cutting rollers, wire drawing rollers, drafting rollers, etc., which can prolong the service life.
(2) Rubber tires: Because the CPU has good load-bearing performance, good wear resistance and high strength, it can be used as heavy-duty solid wheels: such as solid wheels for battery cars, self-lifting loading and unloading trucks, mine forklifts and forklifts, etc. It can also be used as various cable pulleys, support pulleys, speed-increasing pulleys for textiles (n=500,000-400,000 r.p.m), shopping mall elevator pulleys, and precision-equipped miniature pulleys.
(3) Tape: There are more than 300 kinds of polyurethane tapes commonly used: large-scale conveyor belts and hoist belts such as mines and docks; medium-sized conveyor belts such as beer and various glass bottles; small synchronous toothed belts, stepless The service life of variable speed belts, high-speed transmission belts, V-belts and V-ribbed belts, and small precision instrument transmission belts is 20 to 30 times longer than that of natural rubber.
(4) Seals: mainly used as oil seals, especially high-pressure oil seals, such as engineering hydraulic seals, forging press seals, oil field mud pump seals and seals with high technical requirements. For example, the leather cup of the main landing gear of the aircraft is made of polyurethane elastic system, and the service life is increased by dozens of times, which effectively guarantees the safe flight of the aircraft. As a seal for liquid hydrogen, it has also achieved good results.
(5) Die cushion: It is matched with metal cutting machine, punching machine and molding, etc. It has a long service life, good processing quality, and basically solves the processing problem of thin plate punching die. Polyurethane is used as the mold lining of the steel pipe straightening machine, which can straighten the steel pipe without damaging the surface of the steel pipe.
(6) Elastic coupling components: long service life and good buffer performance.
3. In the automotive industry: mainly used in wear-resistant parts, shock-absorbing parts and decoration.
(1) Steering shaft ball bowl: No damage after driving for 60,000 kilometers. The performance of the transverse tie rod assembly has also reached the required level.
(2) Sealing rings for electric wheels of 100-ton trucks: meet the high requirements of oil resistance, pressure resistance, high temperature resistance (150°C) and water resistance.
(3) Automobile tires: Great progress has been made in the development of polyurethane tires in foreign countries. It is still normal to drive at a speed of 185kk/h for more than 100,000 hours.
4. Construction industry:
(1) Pavement materials: pavement for indoor and activity grounds.
(2) Ceramic and plaster decoration molds have gradually replaced traditional steel molds.
5. Petroleum industry: The oil mining environment is harsh, and the sand and gravel are severely worn. For example, mud pump oil plugs, valve rubber, cyclones, hydraulic seals, etc. must be made of polyurethane elastic systems.
6. Other aspects:
(1) Sound-permeable elastomer, with a sound transmission rate > 99%, and resistant to seawater, can be used as a transducer seal for ocean sound detection.
(2) In terms of electronic technology, polyurethane elastomers have been successfully used in high-voltage power supplies for potting aircraft, high-voltage electrical sockets for nuclear submarines, high-voltage packages for automobiles and motorcycles, integrated circuit boards and electronic components for automatic control, with long life , works reliably.
The above is the application of the CPU.
