[China Aluminum Network] The main factors of aluminum cracks:
Wiper PU seals type is used for cylinder piston rod of dustproof seals.J tpye PU Wiper is used to prevent contaminants from mixing into hydraulic and sealing systems.
Wiper pu seal ring has a wide working temperature range, a very good dust scraping function, and a reliable excircle positioning.There is no backpressure between the seal ring and the dust ring
Wiper PU J/JA seals Wiper Pu J/Ja Seals,Wiper Seals DPS,Dust Proof Sealing Ring DPS,DPS Seals Shenyang ZhongYe Seals Factory ,
1. The extrusion temperature is too high, the tensile strength of the metal surface decreases, and cracks occur under friction.
2. Due to friction, the metal surface is subjected to additional tensile stress. When the additional tensile stress is greater than the surface metal tensile strength, cracks will occur.
3. When the extrusion speed is too fast, the additional tensile stress on the surface of the metal increases to cause cracks in the profile.
Solution: Strictly control the extrusion process parameters to ensure a reasonable outlet speed and outlet temperature.