Ningbo Fangli Technology Co., Ltd. is a mechanical equipment manufacturer with nearly 30 years’ experiences of plastic pipe extrusion equipment, new environmental protection and new materials equipment. Since its establishment Fangli has been developed based on user’s demands. Through continuous improvement, independent R&D on the core technology and digestion & absorption of advanced technology and other means, we have developed PVC pipe extrusion line, PP-R pipe extrusion line, PE water supply / gas pipe extrusion line, which was recommended by the Chinese Ministry of Construction to replace imported products. We have gained the title of “First-class Brand in Zhejiang Province”.
After more than 100 years of development, plastic extruders have been derived from the original single screw into twin-screw, multi screw, or even non screw and other models. The plastic extruder (main machine) can be matched with various plastic molding auxiliary machines such as pipe, film, holding material, monofilament, flat wire, packing belt, extrusion net, plate (sheet) material, profile, granulation, cable coating, etc., to form various plastic extrusion production lines and produce various plastic products. Let's briefly analyze the development trend of precision plastic extruder.
1、The extruder is developing towards large-scale, high-speed and high-efficiency
Extruders with screw diameter of 200-250mm are very common, and special extruders with screw diameter greater than 400mm are not rare. Increasing the screw diameter can improve the production capacity of the extruder. When the screw diameter is doubled, the production capacity of the extruder can be increased several times.
The emergence of high-speed and ultra-high-speed extruders with rotational speed above 300r / min abroad has greatly improved the production capacity of the extruder. However, the increase of rotating speed will bring problems such as poor plasticization, which leads to many new screws, such as separation type, mixing type, barrier type, shunt type, combined type and so on. The length diameter ratio of the screw has also developed from 20:1 to 36:1, and some are as high as 43:1.
The auxiliary equipment of extruder has also been improved and standardized to meet the requirements of different plastic products. Modular production can meet the special requirements of different users, shorten the R & D cycle of new products and strive for greater market share; Specialized production can arrange fixed-point production or even global procurement of various system module components of extrusion equipment, which is very beneficial to ensure the whole period quality, reduce costs and accelerate capital turnover.
3、Intellectualization and networking
Modern electronic and computer control technology has been widely used in extruders in developed countries to detect the process parameters of the whole extrusion process, such as melt pressure and temperature, body temperature of each section, rotating speed of main screw and feeding screw, feeding volume, ratio of various raw materials, current and voltage of motor, and adopt microcomputer closed-loop control. 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 accuracy of products.
In order to meet the requirements of new materials and new processes, new or special extruders continue to appear. Such as three screw extruder, planetary multi screw extruder, screw less extruder, reactive extruder, two-color extruder, foaming extruder, etc.
If you need more information, Ningbo Fangli Technology Co., Ltd. welcomes you to contact for a detailed inquiry, we will provide you with professional technical guidance or equipment procurement suggestions.