ã€Asia Pump Network News】 Anything in the use of the process will have losses, and only pay more attention when in use, to enhance routine maintenance and repair, to reduce wear and tear. Now that the reasons for the three screw pump wear are what. Three screw pump Three screw pump wear five reasons: 1, each plastic, have an ideal plasticization processing temperature range, the barrel should be controlled processing temperature, so close to this temperature range. Granular plastic into the barrel from the hopper, will first reach the feeding section, the feeding section will inevitably appear dry friction, when these plastics lack of heating, uneven melting, it is likely to cause the cylinder wall and screw surface wear increased. Similarly, in the compression section and the homogenization section, if the molten state of the plastic is disturbed, the abrasion will also be accelerated. 2, speed should be properly adjusted. As part of the plastic with toughening agents, such as fiberglass, minerals or other fillers. The friction of these materials on metallic materials is often much greater than that of molten plastic. Injection of these plastics at high rotational speeds will increase the shearing force on the plastic and at the same time will result in more shredded fibers correspondingly to the reinforcement. The shredded fibers will have sharp ends that will cause wear The power is greatly increased. Inorganic minerals in high-speed sliding metal surface, the scraping effect is not small. Therefore, the speed should not be adjusted too high. 3, the screw rotation in the barrel, the friction between the material and the two, so that the working surface of the screw and the barrel gradually wear: screw diameter is gradually reduced, the inner diameter of the cylinder gradually increased. In this way, screw and barrel with the diameter of the gap, with the gradual wear and tear of both a little bit larger. However, since the resistance of the nose and manifold in front of the barrel is unchanged, this increases the amount of leakage when the material being extruded advances, i.e., the amount of material flowing from the diameter gap to the feed. As a result, plastic machinery production is reduced. This phenomenon in turn makes the material in the barrel residence time increases, resulting in material decomposition. In the case of polyethylene, the hydrogen chloride gas produced by decomposition enhances the corrosion of the screw and barrel. 4, materials such as calcium carbonate and glass fiber filler, can speed up the screw and barrel wear. 5, As the material is not plasticizing evenly, or metal foreign material mixed into the material, so that the screw torque suddenly increases the torque, the torque beyond the limit of the strength of the screw, the screw twist. This is an unconventional accidental damage. Further Reading: pump valve pipe fittings Exhibition 2016 Exhibition of Information Industry, Internet (Xiamen) Technology Co., Ltd. Author: Asian pumps Network Editor: Yao Xiaoxia (QQ / micro letter:) http://beng.liuti.cn/ (Hotline :)
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