Five major development trends of plastic extruders

    High speed and high yield extruder High speed and high yield can enable investors to obtain greater output and high returns with lower investment. However, the high-speed speed of the extruder screw also brings a series of difficulties to be overcome: For example, the reduction of the residence time of the material in the screw will lead to the uneven plasticization of the material, the excessive shear of the material may cause the sudden temperature rise and thermal decomposition of the material, and the difficulty in the control of extrusion stability will cause the geometric size fluctuation of the extruder. The accuracy of related auxiliary devices and control systems must be improved, and the wear of the screw and the barrel will increase. The problems such as how to improve the life of the reducer and bearing in the case of high-speed operation need to be solved.

    The high efficiency of multi-functional plastic extruder is mainly reflected in high output, low energy consumption and low manufacturing cost. In terms of function, screw extruder has not only been used for extrusion molding and mixing processing of polymer materials, its use has been expanded to food, feed, electrodes, explosives, building materials, packaging, pulp, ceramics and other fields. In addition, the "one-step extrusion process" that combines the mixing granulation and extrusion molding process is also worthy of attention.

    The realization of large-scale extrusion molding equipment can reduce the production cost, which is more obvious in the large twin-screw granulation unit, film blowing unit, pipe extrusion unit and so on. The major technical equipment required for national key construction services, and the large extruded granulation unit, one of the three key equipment supporting large-scale ethylene projects, has long relied on imports, so it is necessary to speed up the localization process to meet the development needs of the petrochemical industry. The precision can improve the gold content of the product, such as multi-layer co-extruded composite film, etc., need precision extrusion, and as an important means to achieve precision extrusion, melt gear pump must increase efforts to develop and research.

    Modular and specialized modular production can adapt to the special requirements of different users, shorten the research and development cycle of new products, and strive for greater market share; The specialized production can arrange the various system module components of extrusion molding equipment for fixed-point production or even global procurement, which is very beneficial to ensure the quality of the whole period, reduce costs, and accelerate capital turnover.

    Intelligent and networked extruders in developed countries have generally adopted modern electronic and computer control technology, and the process parameters of the entire extrusion process such as melt pressure and temperature, the temperature of each section of the fuselage, the main screw and feeding screw speed, the feeding amount, the ratio of various raw materials, the current and voltage of the motor are tested online, and the microcomputer is used for closed-loop control. Some companies have adopted online remote monitoring, diagnosis and control for network control of extrusion molding production lines. This is very beneficial to ensure the stability of the process conditions and improve the accuracy of the product.