5 major development trends of plastic extruder

High speed and high productivity

The high speed and high output of the extruder enable investors to obtain higher output and high returns with lower investment. However, the high speed of the extruder screw speed also brings a series of difficulties that need to be overcome: if the residence time of the material in the screw is reduced, the material will be mixed and plasticized unevenly, and the material may be subjected to excessive shearing, which may cause sudden heating and heat of the material. Decomposition, difficult to control the extrusion stability will cause the geometry of the extrudate to fluctuate, the accuracy of the related auxiliary devices and control systems must be improved, and the wear of the screw and the barrel is intensified. High wear-resistance and ultra-high wear-resistant materials are required. Problems such as how to improve the life of the bearing at high speeds need to be solved.

Efficient and multifunctional

The efficiency of plastic extruders is mainly reflected in high output, low energy consumption and low manufacturing cost. In terms of functions, screw extruders have not only been used for extrusion molding and mixing of polymer materials, but their use has been broadened into food, packaging, feed, explosives, building materials, pulp and other fields. In addition, the "one-step extrusion process" in which the kneading granulation and the extrusion molding process are combined into one is also worthy of attention.

Large size and precision

Achieving large-scale extrusion molding equipment can reduce production costs, which is more obvious in large-scale twin-screw granulating units, blown film units, and pipe extrusion units. The major technical equipment required for national key construction services, and the large-scale extrusion granulation unit of one of the three key equipments for large-scale ethylene projects have long relied on imports. Therefore, 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. For example, multi-layer co-extruded composite film needs precision extrusion, and as an important means to achieve precision extrusion, the melt gear pump must be intensively developed.

Modular and specialized

Modular production can adapt to the special requirements of different users, shorten the development cycle of New Products, and strive for a larger market share; and specialized production can arrange the various system module components of extrusion molding equipment to be fixed-point production or even global procurement. It is very beneficial to guarantee 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, process parameters for the entire extrusion process such as melt pressure and temperature, body temperature, main screw and feed screw speed, feed amount, each The parameters of the raw materials, the current and voltage of the motor are measured online, and the closed-loop control of the microcomputer is adopted. Some companies have adopted online remote monitoring, diagnosis and control to network control the extrusion molding line. This is very advantageous for ensuring the stability of the process conditions and improving the accuracy of the product.