Plastic extruder after more than 100 years of development, has been derived from the original single screw double screw, multi screw, even no screw and other models.The plastic extruder (main machine) can be matched with various plastic molding auxiliary machines such as pipe, film, holding material, single filament, flat filament, packing belt, extruding net, plate (sheet) material, special-profile, granulation, cable cladding, etc., to form various plastic extrusion molding production lines and produce all kinds of plastic products.
Development trend of plastic extruder
1. The extruder is developing in the direction of large-scale, high speed and high efficiency
Foreign extruders with screw diameter of 200-250mm are very common, and special extruders with screw diameter greater than 400mm are not rare.The production capacity of the extruder can be increased by increasing the diameter of the screw. When the diameter of the screw is doubled, the production capacity of the extruder can be increased several times.
High speed extruders and ultra-high speed extruders whose speed is more than 300r/min appear abroad, which greatly improves the production capacity of extruders.But after the increase of speed will bring poor plasticization and other problems, which has a lot of new screw, such as separation type, mixing type, barrier type, diversion type, combination type and so on.The length-diameter ratio of the screw also developed from 20:1 to 36:1, some as high as 43:1.
The auxiliary equipment of the extruder has also been improved and standardized to meet the requirements of different plastic products.Modular production can adapt to the special requirements of different users, shorten the research and development cycle of new products, and strive for a larger market share;The specialized production can arrange the system module parts of the extrusion molding equipment for fixed-point production or even global procurement, which is very beneficial to ensure the quality of the whole period, reduce the cost and accelerate the capital turnover.
3. Intelligent and networked
The extruder of developed countries has been widely used modern electronic and computer control technology, the process parameters of the extrusion process such as melt pressure and temperature, paragraphs body temperature, the main screw and feed screw speed, feed rate of the proportion of all kinds of raw materials, such as current voltage of the motor parameters online testing, and USES the microcomputer closed-loop control.Some companies have adopted online remote monitoring, diagnosis and control, and carried out network control on extrusion molding production line.This is very beneficial to ensure the stability of technological conditions and improve the precision of products.
In order to meet the requirements of new materials and new processes, new or special extruders are constantly appearing.Such as three screw extruder and planetary multi screw extruder, no screw extruder, reactive extruder, two color extruder, foam extruder, etc...
What is the industry prospect of plastic extruder?
Because China's extruder products are closely linked to strategic new industries, with the advantages of high efficiency, energy saving and high cost performance, exports to developed countries are mainly in the middle and low end, this part of consumer demand is rigid.Therefore, plastic machinery industry will have broad market prospects.At the same time, we also need to look at the challenges we face!
Post time: Apr-02-2021