Five development trends of plastic extrusion die

The high speed and high yield of plastic extrusion die can make investors obtain higher output and higher return with lower investment. However, the high speed of extruder screw speed also brings a series of difficulties to be overcome: for example, the reduction of material residence time in the screw will lead to uneven material mixing and plasticization, excessive shearing of materials may cause sudden temperature rise and thermal decomposition of materials, and the difficulty in controlling extrusion stability will cause the geometric size fluctuation of extrudates. The accuracy of relevant auxiliary devices and control systems must be improved High, the wear of screw and barrel increases, high wear-resistant and ultra-high wear-resistant materials are needed, and how to improve the service life of reducer and bearing under high-speed operation needs to be solved.

High efficiency and multi-functional plastic extruder is mainly reflected in high output, low energy consumption and low manufacturing cost. In terms of function, screw extruder is not only used for extrusion molding and mixing processing of polymer materials, but also has been extended to food, feed, electrode, explosive, building materials, packaging, pulp, ceramics and other fields. In addition, the "one-step extrusion process" which integrates the mixing granulation and extrusion molding processes is also worthy of attention.

 

Large scale and precision to realize the large-scale extrusion molding equipment can reduce the production cost, which is more obvious in large-scale twin-screw granulation unit, film blowing unit, pipe extrusion unit and so on. The major technical equipment required by the state's key construction services and one of the three key equipment for large-scale ethylene project, large-scale extrusion granulation unit, which is one of the three key equipment for large-scale ethylene project, has been imported for a long time. Therefore, it is necessary to accelerate the process of localization to meet the development needs of petrochemical industry. Precision can improve the gold content of products, such as multi-layer coextrusion composite film and so on. As an important means to realize precision extrusion, melt gear pump must be developed and researched.

 

Modular and specialized modular production can adapt to the special requirements of different users, shorten the R & D cycle of new products and strive for more market share; while specialized production can arrange the fixed-point production and even global procurement of each system module component of extrusion molding equipment, which is very beneficial to ensure the whole period quality, reduce costs and accelerate capital turnover.

 

Modern electronic and computer control technology has been widely used in the intelligent and networked extruders in developed countries. The process parameters of the whole extrusion process, such as melt pressure and temperature, body temperature of each section, rotational speed of main screw and feeding screw, feed rate, ratio of various raw materials, current and voltage of electric machine, etc., are detected on-line, and closed-loop microcomputer control is adopted. Some companies have adopted online remote monitoring, diagnosis and control to control the extrusion production line. This is very beneficial to ensure the stability of process conditions and improve the precision of products.