The nylon plastic pulley is light in weight and easy to install at high altitude. The nylon pulley has been widely used as a tower crane accessory in various lifting equipment. Because the metal pulley wears speed and the price is too high, it is now
The nylon plastic pulley is light in weight and easy to install at high altitude. The nylon pulley has been widely used as a tower crane accessory in various lifting equipment. Because the metal pulley wears speed and the price is too high, it is now replaced as much as possible.
The nylon plastic pulley is directly polymerized in the mold by alkali catalyzed polymerization. The polymerization and molding are completed at the same time. In addition to the rigidity and self-lubricating properties of the general nylon material, mechanical strength, dimensional stability, wear reduction and wear resistance are superior to others. Nylon products. The comprehensive performance is comparable to that of similar foreign products, and has been successfully applied to various primary and secondary bearing structural components such as chemical machinery and textiles, as well as fishing boat propellers.
The post-treatment of the nylon pulley is to prevent and eliminate residual stress in the article or dimensional changes caused by moisture absorption. Post-treatment methods include heat treatment and humidity control.
PA of nylon pulley has good fluidity and is easy to overflow. It should be used with a self-locking nozzle and should be heated. At the same time, due to the rapid condensation speed of the solution, materials should be prevented from blocking the nozzle, runner, gate, etc., resulting in insufficient products. Mold overflow value is 0.03. Melt viscosity is sensitive to temperature and shear force, but more sensitive to temperature.
Firstly, the melt viscosity is reduced from the barrel temperature. Forming shrinkage range and shrinkage rate, direction is obvious, shrinkage and deformation may occur. PA regrinding should not be used more than three times to avoid discoloration of nylon pulleys or sharp degradation of mechanical and physical properties. Applications should be kept under 25%. Excessive conditions may cause fluctuations in process conditions. When mixed with a new material, the recycled material must be dried.
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